O'Hare International Airport

{{See also|Illinois World War II Army Airfields}}

File:F4F-3WildcatOHareAirport-DLighting.jpg on display in O'Hare's Terminal 2, restored in the markings of "Butch" O'Hare's plane]]

Soon after the opening of Chicago Municipal Airport in 1926, the City of Chicago realized more airport capacity would be needed. The city government investigated various sites in the 1930s but made little progress before America's entry into World War II.

O'Hare began as a manufacturing plant for Douglas C-54 Skymasters during World War II. The site was originally known as Orchard Place, which was previously a small German-American farming community. The {{convert|2|e6sqft|m2}} plant, in the northeast corner of what is now the airport, needed easy access to the workforce of Chicago—the nation's second-largest city at the time, as well as needing railroads and location far from enemy threat. 655 C-54s were built at the plant, more than half of all produced. The airfield, from which the C-54s flew out, was known as Douglas Airport; initially, it had four {{convert|5500|ft|m|adj = on}} runways. This was also the location of the Army Air Force's 803rd Specialized Depot,{{cite web |title=The Early Years: Major Commands |url=https://secure.afa.org/Mitchell/reports/1206_60years.pdf |website=Air Force Association |access-date=August 31, 2018 |archive-url=https://web.archive.org/web/20190412100403/https://secure.afa.org/Mitchell/reports/1206_60years.pdf |archive-date=April 12, 2019 |url-status=live }} a unit charged with storing many captured enemy aircraft; a few representatives of this collection would eventually be transferred to the Smithsonian Institution's National Air and Space Museum.{{cite web|title=Messerschmitt Me 262 A-1a Schwalbe (Swallow)|url=https://airandspace.si.edu/collection-objects/messerschmitt-me-262-1a-schwalbe-swallow|website=Smithsonian: National Air & Space Museum|date=April 22, 2016 |publisher=Smithsonian Institution|access-date=May 24, 2018|archive-url=https://web.archive.org/web/20180612144432/https://airandspace.si.edu/collection-objects/messerschmitt-me-262-1a-schwalbe-swallow|archive-date=June 12, 2018|url-status=live}}{{cite web|title=Junkers Ju 388 L-1|url=https://airandspace.si.edu/collection-objects/junkers-ju-388-l-1|website=Smithsonian: National Air & Space Museum|date=March 19, 2016 |publisher=Smithsonian Institution|access-date=May 24, 2018|archive-url=https://web.archive.org/web/20180612144444/https://airandspace.si.edu/collection-objects/junkers-ju-388-l-1|archive-date=June 12, 2018|url-status=live}}

Douglas Company's contract ended with the war's conclusion. Douglas considered building airliners at Orchard but chose to concentrate civil production at its headquarters in Santa Monica, California. With the departure of Douglas, the complex took the name Orchard Field Airport, and was assigned the IATA code ORD.{{cite web|title=The Wacky Logic Behind Airport Codes|url=https://abcnews.go.com/Travel/history-airport-codes-logic-letter-codes/story?id=11684406|publisher=ABC.com|access-date=August 7, 2017|archive-url=https://web.archive.org/web/20170817100522/https://abcnews.go.com/Travel/history-airport-codes-logic-letter-codes/story?id=11684406|archive-date=August 17, 2017|url-status=live}}

The United States Air Force used the field extensively during the Korean War; the airport then had no scheduled airline service. Although not its primary base in the area, the Air Force used O'Hare as a fighter base; it was home to the 62nd Fighter-Interceptor Squadron flying North American F-86 Sabres from 1950 to 1959.{{cite web|title=62 Fighter Squadron (AETC)|url=https://www.dafhistory.af.mil/About-Us/Fact-Sheets/Display/Article/433226/62-fighter-squadron-aetc/|website=Air Force Historical Research Agency|publisher=United States Air Force|access-date=May 11, 2018|archive-url=https://web.archive.org/web/20180701194107/http://www.afhra.af.mil/About-Us/Fact-Sheets/Display/Article/433226/62-fighter-squadron-aetc/|archive-date=July 1, 2018|url-status=live}} By 1960, the need for O'Hare as an active duty fighter base was diminishing, just as commercial business was picking up at the airport. The Air Force removed active-duty units from O'Hare and turned the station over to Continental Air Command, enabling them to base reserve and Air National Guard units there.{{cite web|title=ABSTRACT|url=http://airforcehistoryindex.org/data/000/462/865.xml|website=airforcehistoryindex.org|publisher=US Air Force|access-date=March 16, 2018|archive-url=https://web.archive.org/web/20110724231012/http://airforcehistoryindex.org/data/000/462/865.xml|archive-date=July 24, 2011|url-status=live}} As a result of a 1993 agreement between the City and the Department of Defense, the reserve base was closed on April 1, 1997, ending its career as the home of the 928th Airlift Wing and of the 126th Air Refueling Wing in 1999. At that time, the remaining {{convert|357|acre|adj=on}} site came under the ownership of the Chicago Department of Aviation.{{cite web|title=1,000 Bid Farewell To O'hare's Air Force Reserve Base|url=https://www.chicagotribune.com/1997/03/24/1000-bid-farewell-to-ohares-air-force-reserve-base/|website=chicagotribune.com|date=March 24, 1997 |publisher=tronc|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401212701/http://articles.chicagotribune.com/1997-03-24/news/9703240150_1_air-force-reservists-base-final-goodbye|archive-date=April 1, 2018|url-status=live}}

In 1945, Chicago mayor Edward Kelly established a board to choose the site of a new airport to meet future demand. After considering various proposals, the board decided upon the Orchard Field site and acquired most of the federal government property in March 1946. The military retained a small parcel of property on the site and the right to use 25% of the airfield's operating capacity for free.

Ralph H. Burke devised an airport master plan based on the pioneering idea of what he called "split finger terminals", allowing a terminal building to be attached to "airline wings" (concourses), each providing space for gates and planes. (Pre-war airport designs had favored ever-larger single terminals, exemplified by Berlin's Tempelhof.) Burke's design also included underground refueling, direct highway access to the front of terminals, and direct rail access from downtown, all of which are utilized at airports worldwide today.{{cite web |last1=Burley |first1=Paul |title=Ralph H. Burke: Early Innovator of Chicago O'Hare International Airport |url=https://www.library.northwestern.edu/libraries-collections/transportation/collection/o-hare-at-50/research-materials/ralph-h-burke.html |website=library.northwestern.edu |publisher=Northwestern University |access-date=December 30, 2019 |archive-date=December 30, 2019 |archive-url=https://web.archive.org/web/20191230015426/https://www.library.northwestern.edu/libraries-collections/transportation/collection/o-hare-at-50/research-materials/ralph-h-burke.html |url-status=live }} O'Hare was the site of the world's first jet bridge in 1958,{{cite news |title=Briefings... |page=58 |url=https://books.google.com/books?id=CJ5OB0Vh8VUC&q=aero-gangplank&pg=PA94 |access-date=August 13, 2018 |work=Flying Magazine |agency=Google |volume=62 |issue=6 |publisher=Ziff-Davis Publishing |date=June 1, 1958 |archive-date=April 17, 2021 |archive-url=https://web.archive.org/web/20210417173334/https://books.google.com/books?id=CJ5OB0Vh8VUC&q=aero-gangplank&pg=PA94 |url-status=live }}{{cite news |title=Airport's Mobile Covered Bridge |volume=44 |work=Life Magazine |issue=16 |publisher=Time-Life Publishing |date=April 21, 1958}} and successfully adapted slip form paving, developed for the nation's new Interstate highway system, for seamless concrete runways.

In 1949, the City renamed the facility O'Hare Airport to honor Edward "Butch" O'Hare, the U.S. Navy's first flying ace and Medal of Honor recipient in World War II.{{cite web|title=YESTERDAY'S CITY – Part III|url=http://polishnews.com/yesterday-s-city-part-iii|website=polishnews.com|date=January 16, 2013|publisher=MH Magazine|access-date=April 7, 2018|archive-url=https://web.archive.org/web/20180407183621/http://polishnews.com/yesterday-s-city-part-iii|archive-date=April 7, 2018|url-status=live}} Its IATA code (ORD) remained unchanged, however, resulting in O'Hare being one of the few IATA codes bearing no connection to the airport's name or metropolitan area.

Scheduled passenger service began in 1955,{{cite web |title=O'Hare History |url=http://www.flychicago.com/OHare/EN/AboutUs/History.aspx |website=Fly Chicago |publisher=Chicago Department of Aviation |access-date=September 1, 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150924013918/http://www.flychicago.com/OHare/EN/AboutUs/History.aspx |archive-date=September 24, 2015 }} but growth was slow at first. Although Chicago had invested over $25 million in O'Hare, Midway remained the world's busiest airport and airlines were reluctant to move until highway access and other improvements were completed.{{cite news |title=Airports for the Jet Age: The U.S. Is Far from Ready |url=http://www.time.com/time/magazine/article/0,9171,937983,00.html |work=Time Magazine |date=October 21, 1957 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120719235640/http://www.time.com/time/magazine/article/0,9171,937983,00.html |archive-date=July 19, 2012 |url-status=dead }} The April 1957 Official Airline Guide listed 36 weekday departures from O'Hare, while Midway had 414. Improvements began to attract the airlines: O'Hare's first international terminal opened in August 1958, and by April 1959 the airport had expanded to {{convert|7,200|acre|ha}} with new hangars, terminals, parking and other facilities. The expressway link to downtown Chicago, now known as the Kennedy Expressway, was completed in 1960. New Terminals{{nbsp}}2 and{{nbsp}}3, designed by C. F. Murphy and Associates, opened on January 1, 1962.{{cite news |date=April 2, 1959 |title=Break Ground at O'Hare for Terminal Unit |url=https://www.newspapers.com/article/chicago-tribune-break-ground-at-ohare-f/33775140/ |access-date=2025-03-29 |newspaper=Chicago Daily Tribune |pages=2 |via=Newspapers.com}}

The biggest factor driving airlines to relocate their operations from Midway to O'Hare was the jet airliner; the first scheduled jet at O'Hare was an American 707 from New York to Chicago to San Francisco on March 22, 1959.Chicago Tribune March 22, 1959, part 1 p3, March 23 part 3 p19 One-mile-square (2.6-kilometer-square) Midway had no space for the runways that 707s and DC-8s required. Airlines had been reluctant to move to O'Hare, but they naturally did not want to split their operations: in July 1962, the last fixed-wing scheduled airline flight in Chicago moved from Midway to O'Hare. Until United returned in July 1964, Midway's only scheduled airline was Chicago Helicopter Airways. The arrival of Midway's traffic quickly made O'Hare the world's busiest airport, serving 10 million passengers annually. Within two years, that number would double, with Chicagoans boasting that more people passed through O'Hare in 12 months than Ellis Island had processed in its entire existence. O'Hare remained the world's busiest airport until it was eclipsed by Hartsfield-Jackson Atlanta International Airport in 1998.

O'Hare had four runways in 1955;{{cite book |url=https://babel.hathitrust.org/cgi/pt?id=uiug.30112033242345&view=1up&seq=18&skin=2021 |title=#18 Illinois airport directory |date=1956 |via=HathiTrust|publisher=Dept. of Transportation, Division of Aeronautics. }} {{convert|8000|foot|m}} runway 14R/32L opened in 1956 and was extended to {{convert|11600|ft|m}} a few years later, allowing nonstops to Europe. Runway 9R/27L (now 10L/28R) opened in 1968 and runway 4R/22L in 1971.

In the 1980s, after passage of US airline deregulation, the first major change at O'Hare occurred when TWA left Chicago for St. Louis as its main mid-continent hub.{{cite web |title=TWA Routes |url=http://airchive.com/html/timetable-and-route-maps/twa/1987-january-1/7236 |work=Airways News |date=January 1, 1987 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120320075618/http://airchive.com/html/timetable-and-route-maps/twa/1987-january-1/7236 |archive-date=March 20, 2012 |url-status=live }} Although TWA had a large hangar complex at O'Hare and had started Constellation nonstops to Paris in 1958, by the time of deregulation its operation was losing $25 million a year under competition from United and American.{{cite news|title=THE AIRLINE BATTLE AT O'HARE|url=https://www.nytimes.com/1983/11/04/business/the-airline-battle-at-o-hare.html|website=The New York Times|date=November 4, 1983 |access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401212738/https://www.nytimes.com/1983/11/04/business/the-airline-battle-at-o-hare.html|archive-date=April 1, 2018|url-status=live}} Northwest likewise ceded O'Hare to the competition and shifted to a Minneapolis/St. Paul and Detroit-centered network by the early 1990s after acquiring Republic Airlines in 1986.{{cite web |title=North America Nonstop Routes |url=http://airchive.com/html/timetable-and-route-maps/northwest/1994-domestic-route-map/7021 |work=Airways News |year=1994 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120320075627/http://airchive.com/html/timetable-and-route-maps/northwest/1994-domestic-route-map/7021 |archive-date=March 20, 2012 |url-status=live }} Delta maintained an O'Hare hub for some time, even commissioning a new Concourse{{nbsp}}L in 1983.{{cite web|last1=Petchmo|first1=Ian|title=The Fascinating History Chicago's O'Hare International Airport: 1960–2000|url=https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-1960-2000/|website=airwaysmag.com|date=April 14, 2014 |publisher=Airways International, Inc.|access-date=April 7, 2018|archive-url=https://web.archive.org/web/20180407182703/https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-1960-2000/|archive-date=April 7, 2018|url-status=live}} Ultimately, Delta found competing from an inferior position at O'Hare too expensive and closed its Chicago hub in the 1990s, concentrating its upper Midwest operations at Cincinnati.

File:United Airlines corridor, Chicago OHare Airport (6196116901).jpg

The dominant hubs established at O'Hare in the 1980s by United and American continue to operate today. United developed a new two-concourse Terminal{{nbsp}}1 (dubbed "The Terminal for Tomorrow"), designed by Helmut Jahn. It was built between 1985 and 1987 on the site of the original Terminal{{nbsp}}1; the structure, which includes 50 gates, is best known for its curved glass forms and the connecting underground tunnel between Concourses{{nbsp}}B and{{nbsp}}C.{{cite news |title=United's Flashy Terminal Ready For Takeoff |first=Gary |last=Washburn |url=https://www.chicagotribune.com/1987/08/04/uniteds-flashy-terminal-ready-for-takeoff/ |newspaper=Chicago Tribune |date=August 4, 1987 |access-date=July 2, 2012 |archive-url=https://web.archive.org/web/20130315165728/http://articles.chicagotribune.com/1987-08-04/news/8702260809_1_walkway-concourse-neon |archive-date=March 15, 2013 |url-status=live }} The tunnel is illuminated with a neon installation titled Sky's the Limit (1987) by Canadian artist Michael Hayden, which plays an airy, slow-tempo version of Rhapsody in Blue.[https://reportedlost.com/chicago-ohare-international-airport/ Chicago O'Hare International Airport] {{Webarchive|url=https://web.archive.org/web/20200628010944/https://reportedlost.com/chicago-ohare-international-airport/ |date=June 28, 2020 }}. Reported Lost&Found. Retrieved June 24, 2020 American renovated and expanded its existing facilities in Terminal{{nbsp}}3 from 1987 to 1990; those renovations feature a flag-lined entrance hall to Concourses{{nbsp}}H/K.{{cite book |last1=McGovern-Petersen |first1=Laurie |editor1-first=Alice |editor1-last=Sinkevitch |title=AIA Guide to Chicago |chapter=Chicago O'Hare International Airport |chapter-url={{google books|aQE21zTaju8C|page=278|plainurl=yes}} |edition=2nd |date=2004 |publisher=Harcourt |location=Orlando, Florida |isbn=0-15-602908-1 |page=278 |access-date=February 8, 2013}}

The demolition of the original Terminal 1 in 1984 to make way for Jahn's design forced a "temporary" relocation of international flights into facilities called "Terminal{{nbsp}}4" on the ground floor of the airport's central parking garage. International passengers were then transferred by bus to and from their aircraft. Relocation finally ended with the completion of the 21-gate International Terminal in 1993 (now called Terminal{{nbsp}}5); it contains all customs facilities. Its location, on the site of the original cargo area and east of the terminal core, necessitated the construction of a peoplemover, which connected the terminal core with the new terminal as well as remote rental and parking lots.

Following deregulation and the buildup of the American and United hubs, O'Hare faced increasing delays from the late 1980s onward due to its inefficient runway layout; the airfield had remained unchanged since the addition of its last new runway (4R/22L) in 1971.Flightguide Vol. II, Revision 5/71, Airguide Publications/Monty Navarre, Monterrey CA O'Hare's three pairs of angled runways were meant to allow takeoffs into the wind, but they came at a cost: the various intersecting runways were both dangerous and inefficient. Official reports at the end of the 1990s ranked O'Hare as one of the worst-performing airports in the United States based on the percentage of delayed flights.{{cite web |title=Chicago, IL: Chicago O'Hare International (ORD) |url=http://www.transtats.bts.gov/airports.asp?pn=1&Airport=ORD&Airport_Name=Chicago,%20IL:%20O%20Hare&carrier=FACTS |publisher=Bureau of Transportation Statistics |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20120312030823/http://www.transtats.bts.gov/airports.asp?pn=1&Airport=ORD&Airport_Name=Chicago,%20IL:%20O%20Hare&carrier=FACTS |archive-date=March 12, 2012 |url-status=live }} In 2001, the Chicago Department of Aviation committed to an O'Hare Modernization Plan (OMP). Initially estimated at $6.6 billion, the OMP was to be paid by bonds issued against the increase in the federal passenger facility charge enacted that year and federal airport improvement funds.{{cite web|title=Lessons Learned From the Chicago O'Hare Modernization Program|url=https://www.enotrans.org/wp-content/uploads/2015/08/Chicago-paper.pdf?x43122|website=enotrans.com|publisher=Eno Center for Transportation|access-date=April 6, 2018|archive-date=May 1, 2021|archive-url=https://web.archive.org/web/20210501154819/https://www.enotrans.org/wp-content/uploads/2015/08/Chicago-paper.pdf?x43122|url-status=live}} The modernization plan was approved by the FAA in October 2005 and involved a complete reconfiguration of the airfield. The OMP included the construction of four new runways, lengthening two existing runways, and decommissioning three old runways to provide O'Hare with six parallel runways and two crosswind runways.{{cite web |last1=Hinz |first1=Greg |title=Here's how O'Hare's $8.5 billion makeover is moving along |url=https://www.chicagobusiness.com/greg-hinz-politics/heres-how-ohares-85-billion-makeover-moving-along |website=Crain's Chicago Business |date=September 25, 2019 |publisher=Crain Communications, Inc. |access-date=September 26, 2019 |archive-url=https://web.archive.org/web/20190926143835/https://www.chicagobusiness.com/greg-hinz-politics/heres-how-ohares-85-billion-makeover-moving-along |archive-date=September 26, 2019 |url-status=live }}

The OMP was the subject of legal battles, both with suburbs who feared the new layout's noise implications as well as with survivors of persons interred in a cemetery the city proposed to relocate; some of the cases were not resolved until 2011.{{cite web|last1=Petchmo|first1=Ian|title=The Fascinating History Chicago's O'Hare International Airport: 2000 to Present|url=https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-2000-to-present/|website=www.airwaysmag.com|date=April 21, 2014 |publisher=Airways International, Inc|access-date=May 10, 2018|archive-url=https://web.archive.org/web/20180510184104/https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-2000-to-present/|archive-date=May 10, 2018|url-status=live}} These issues, plus the reduction in traffic as a result of the Great Recession, delayed the OMP's completion; construction of the sixth and final parallel runway (9C/27C) began in 2016.{{cite web|title=Runway realignment at O'Hare (map)|url=http://www.chicagotribune.com/chi-getting-around-ohare-runway-gfx-20150720-htmlstory.html|website=chicagotribune.com|date=July 20, 2015 |publisher=Chicago Tribune|access-date=March 31, 2018|archive-url=https://web.archive.org/web/20180401075435/http://www.chicagotribune.com/chi-getting-around-ohare-runway-gfx-20150720-htmlstory.html|archive-date=April 1, 2018|url-status=live}} Its completion in 2020, along with an extension of runway 9R/27L completed in 2021, concluded the OMP.{{cite web |last1=Wessell |first1=Todd |title=$6 Billion, 16-Year O'Hare Modernization Project Ends Construction |date=September 10, 2021 |url=https://www.journal-topics.com/articles/6-billion-16-year-ohare-modernization-project-ends-construction/ |publisher=Journal & Topics |access-date=November 9, 2021 |archive-date=November 9, 2021 |archive-url=https://web.archive.org/web/20211109141327/https://www.journal-topics.com/articles/6-billion-16-year-ohare-modernization-project-ends-construction/ |url-status=live }}

File:O'Hare_Control_Tower_2022.jpg

In 2018, the city and airlines committed to Phase{{nbsp}}I of a new Terminal Area Plan dubbed O'Hare 21. The plan calls for two all-new satellite concourses to the southwest of Concourse C, and to expand Terminals 2 and 5 with additional gates, lounges, and updates to operations all over the airport. (Terminal 5 has ten new gates in addition to its newly expanded facilities, plus two additional gates to each accommodate an Airbus A380.){{cite news|last1=Spielman|first1=Fran|title=City Council approves $8.5 billion O'Hare expansion plan by 40-to-1 vote|url=https://chicago.suntimes.com/chicago-politics/city-council-poised-to-approve-8-5-billion-ohare-expansion-plan/|newspaper=Chicago Sun-Times|location=Chicago|publisher=Chicago Public Media|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401103403/https://chicago.suntimes.com/chicago-politics/city-council-poised-to-approve-8-5-billion-ohare-expansion-plan/|archive-date=April 1, 2018|url-status=dead}} The expansion will enable same-terminal transfers between international and domestic flights, faster connections, improved facilities and technology for TSA and customs inspections and much larger landside amenities such as shopping and restaurants. A principal feature of the plan is the reorganization of the terminal core into an "alliance hub," the first in North America; airside connections and layout will be optimized around airline alliances. This will be made possible by the construction of the O'Hare Global Terminal (OGT) where Terminal{{nbsp}}2 currently stands. The OGT and two new satellite concourses will allow for expansion for both American's and United's international operations as well as easy interchange with their respective Oneworld (American) and Star Alliance (United) partner carriers, eliminating the need to transfer to Terminal 5.

The project will add over {{convert|3|e6sqft|m2}} to the airport's terminals, add a new customs processing center in the OGT, reconstruct gates and concourses (new concourses will be a minimum of {{convert|150|ft|m}} wide), increase the gate count from 185 to 235, and provide 25% more ramp space at every gate throughout the airport to accommodate larger aircraft.{{cite news|last1=Ruthhart|last2=Byrne|first1=Bill|first2=John|date=March 29, 2018|title=$4 billion bond approval earns Emanuel key victory as council green lights O'Hare overhaul|url=https://www.chicagotribune.com/2018/03/29/4-billion-bond-approval-earns-emanuel-key-victory-as-council-green-lights-ohare-overhaul/|newspaper=Chicago Tribune|publisher=Tribune Publishing|location=Chicago|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401084025/http://www.chicagotribune.com/news/local/politics/ct-met-rahm-emanuel-ohare-airport-overhaul-city-council-20180328-story.html|archive-date=April 1, 2018|url-status=live}} After an international design competition that featured public voting on five final architectural proposals, the Studio ORD group, led by architect Jeanne Gang (in collaboration with SCB, Corgan, Milhouse, and STL Architect), was selected to design the OGT,{{cite press release |title=City of Chicago Announces Selection of Studio ORD to Lead Historic O'Hare Expansion |url=https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1540 |website=O'Hare International Airport|location=Chicago |publisher=Chicago Department of Aviation |access-date=March 27, 2019 |archive-url=https://web.archive.org/web/20190327222020/https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1540 |archive-date=March 27, 2019 |url-status=live }}{{cite web |title=Studio Gang to design Chicago O'Hare airport terminal |url=https://www.dezeen.com/2019/03/27/chicago-ohare-global-terminal-concourse-studio-ord-studio-gang/ |website=dezeen.com |date=March 27, 2019 |access-date=April 6, 2019 |archive-url=https://web.archive.org/web/20190331105350/https://www.dezeen.com/2019/03/27/chicago-ohare-global-terminal-concourse-studio-ord-studio-gang/ |archive-date=March 31, 2019 |url-status=live }} while Skidmore, Owings & Merrill LLP will design Satellites{{nbsp}}1 and{{nbsp}}2.{{cite web |title=City of Chicago Announces Selection of SOM, LLP To Design Two Satellite Concourses at O'Hare |url=https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1562 |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=July 15, 2019 |archive-date=May 1, 2021 |archive-url=https://web.archive.org/web/20210501154819/https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1562 |url-status=live }} By terms of the agreement, total costs of $8.5 billion for the project are to be borne by bonds issued by the city, which will be retired by airport usage fees paid by airlines. O'Hare 21 is scheduled for completion of the two satellite terminals in 2028, and overall completion in 2030.{{cite news|url=https://chicago.curbed.com/2019/1/17/18185431/ohare-design-competition-global-terminal|title=Here are the five designs competing for O'Hare's $8.5B expansion|first=Jay|last=Koziarz|date=January 17, 2019|work=Curbed Chicago|location=Chicago|publisher=Vox Media|access-date=October 1, 2020|archive-date=October 13, 2020|archive-url=https://web.archive.org/web/20201013110807/https://chicago.curbed.com/2019/1/17/18185431/ohare-design-competition-global-terminal|url-status=live}}{{Cite news |last=Hinz |first=Greg |date=November 21, 2022 |title=Massive O'Hare project clears last hurdle |language=en-US |magazine=Crain's Chicago Business |publisher=Crain Communications |location=Chicago |url=https://www.chicagobusiness.com/politics/ohare-project-add-gates-redo-terminals-gets-faa-approval |url-access=subscription |access-date=December 1, 2022}}{{Update inline|date=December 2023|reason=This appears to no longer be on schedule.}}

By November 2023, the project's cost had ballooned far over budget, leading both American Airlines and United Airlines to call for the global terminal project to be cancelled or scaled back.{{Cite web |date=November 28, 2023 |title=As O'Hare expansion price tag climbs, airport's two biggest carriers want project scaled back – or grounded |url=https://chicago.suntimes.com/city-hall/2023/11/28/23979601/ohare-expansion-united-american-airlines-global-international-terminal-gates-flights-chicago |access-date=December 15, 2023 |website=Chicago Sun-Times |language=en}} On May 3, 2024, American Airlines and United Airlines were able to reach an agreement with the City of Chicago to allow the project to continue. In the agreement, the replacement of Terminal 2 would be accelerated, while the addition of Satellite 2 concourse would be delayed. The replacement of Terminal 2 with the OGT was deemed more critical to complete first instead of the Satellite 2 concourse.{{Cite news |date=May 3, 2024 |title=American, United reach agreement with City of Chicago on $8.5B O'Hare Airport overhaul |url=https://www.nbcchicago.com/news/local/chicago-ohare-airport-renovation-american-airlines-united-airlines/3428340/ |access-date=2024-06-28 |publisher=NBC Chicago |language=en-US}}{{Cite news |date=September 7, 2024 |title=Full Updated Timeline Revealed For O'Hare Expansion As City Begins Offering Bonds |url=https://chicagoyimby.com/2024/09/69654.html |access-date=2024-11-13 |language=en-US}} The design of Satellite 1 concourse was presented to the public on May 29, 2024, it was planned to complete Satellite 1 concourse by 2028.{{Cite news |date=May 29, 2024 |title=O'Hare modernization: City unveils designs for Satellite Concourse 1 at O'Hare Global Terminal |url=https://abc7chicago.com/post/mayor-brandon-johnson-update-satellite-concourses-1-2/14882286/ |access-date=2024-11-13 |language=en-US}}

File:Concourse at O'Hare International Airport near gates B11 and B12.jpg

File:Chicago Airport - ND0 5470.jpg

O'Hare has four numbered passenger terminals with nine lettered concourses and a total of 215 gates—the most of any airport in the world.{{cite web |title=Terminal Map |url=https://www.flychicago.com/ohare/map/Pages/default.aspx |website=O'Hare International Airport|publisher=Chicago Department of Aviation |location=Chicago|access-date=March 19, 2021 |archive-date=April 17, 2021 |archive-url=https://web.archive.org/web/20210417183655/https://www.flychicago.com/ohare/map/pages/default.aspx |url-status=live }}

• {{visible anchor|Terminal 1}} is used for United Airlines, Lufthansa and All Nippon Airways flights. It has 52 gates on two concourses, lettered B–C.
• {{visible anchor|Terminal 2}} is used for most United Express and some United flights, as well as all Air Canada, Alaska Airlines, and JetBlue flights. It has 41 gates on two concourses, lettered E–F.
• {{visible anchor|Terminal 3}} is used for American Airlines, Aer Lingus, British Airways, Iberia, Japan Airlines, and Spirit Airlines flights. It has 80 gates on four concourses, lettered G, H, K, and L.
• {{visible anchor|Terminal 5}} is used for Delta Air Lines, Frontier Airlines and Southwest Airlines flights, as well as all international airlines that do not depart from Terminals 1–3.{{cite press release | url=https://www.chicago.gov/city/en/depts/doa/provdrs/dbata/news/2022/april/april62022.html | title=Chicago Department of Aviation Completes First Phase of O'Hare Gate Renumbering at Terminal 5|publisher=Office of Emergency Management and Communications|location=Chicago}}{{cite report|url=https://www.igcinc.org/wp-content/uploads/2021/09/ORD-Common-Use-Stand-Info-Mar-27-2022-thru-Oct-29-2022-DRAFT-2021-0907.pdf|title=ORD Common Gate Use Information|publisher=Chicago Department of Aviation|location=Chicago}} Terminal 5 is also used for non-pre–cleared international arrivals, as it currently contains the airport's U.S. Customs and Border Protection facilities.{{cite web |title=International Traveler - O'Hare Airport |url=https://www.flychicago.com/ohare/myflight/international/pages/default.aspx |access-date=March 19, 2021 |archive-date=April 17, 2021 |archive-url=https://web.archive.org/web/20210417183650/https://www.flychicago.com/ohare/myflight/international/pages/default.aspx |url-status=live }} It has 35 non-sequential gates on a single concourse with the highest number being 40, lettered M. There are 3 gates in this terminal that can accommodate an Airbus A380- the largest commercial airplane in the world.{{Cite web |title=O'Hare Gate 380 Expansion |url=https://www.gregoryramon.com/commercial/ohare-gate-380-expansion |access-date=2025-03-07 |website=Gregory Ramon Design Studio |language=en-US}}

Terminals 1–3 are connected airside via a walkway.{{cite web |title=Connecting Traveler - O'Hare |url=https://www.flychicago.com/ohare/tofrom/connecting/pages/default.aspx |website=O'Hare International Airport |publisher=Chicago Department of Aviation|location=Chicago |access-date=March 11, 2023 |archive-date=March 6, 2023 |archive-url=https://web.archive.org/web/20230306061743/https://www.flychicago.com/ohare/tofrom/connecting/pages/default.aspx |url-status=live }} Terminal 5 is separated from the others by taxiways and does not have a walkway between it and Terminals 1–3; passengers transferring between Terminal 5 and the others can only do so landside via a shuttle bus or the Airport Transit System, requiring rescreening at security, or via an airside shuttle bus that runs between Terminal 5 and Terminals 1 and 3 every 15 minutes from 11:30 am to 9:30 pm.

O'Hare has two sets of parallel runways, one on either side of the terminal complex. Each airfield has three parallel east–west runways (9L/27R, 9C/27C, and 9R/27L on the north side; 10L/28R, 10C/28C, and 10R/28L on the south side) and a crosswind runway oriented northeast–southwest (4L/22R on the north, 4R/22L on the south). The north crosswind runway, 4L/22R, sees limited usage due to intersecting 9R/27L and 9C/27C;{{cite web|title=O'Hare Modernization Final Environmental Impact Statement, Appendix F, Table F-39|url=https://www.faa.gov/airports/airport_development/omp/eis/feis/Media/Appendix%20F/Appendix-F.pdf|website=faa.gov|publisher=Federal Aviation Administration|access-date=April 5, 2018|archive-url=https://web.archive.org/web/20180405153034/https://www.faa.gov/airports/airport_development/omp/eis/feis/Media/Appendix%20F/Appendix-F.pdf|archive-date=April 5, 2018|url-status=live}} however, runway 22L is often used for takeoffs during what is called "west flow" on the main runways. The airfield is managed by three FAA air traffic control towers. O'Hare has a voluntary nighttime (22:00–07:00) noise abatement program.{{cite web|title=Fly Quiet Program|url=http://www.flychicago.com/community/ORDnoise/FlyQuiet/Pages/default.aspx|website=flychicago.com|publisher=City of Chicago Department of Aviation|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401213908/http://www.flychicago.com/community/ORDnoise/FlyQuiet/Pages/default.aspx|archive-date=April 1, 2018|url-status=live}}

In 2015, runway 32R/14L was permanently closed after 72 years of service, in favor of the new runway 10R/28L. In 2019, runway 32L/14R was also closed.{{cite web |url=https://worldwideaviation.solutions/blog/2015/8/20/runway-14l-32r-closed |title=Runway 14L/32R closed |publisher=worldwideaviation |date=August 20, 2015 |accessdate=December 8, 2023}}

Currently, O'Hare has the most runways of any civilian airport in the world, totaling eight."FAA: Construction can start on new O'Hare terminals". (November 25, 2022). Hometown Register, p.A2 col.2

The Hilton Chicago O'Hare is between the terminal core and parking garage and is currently the only hotel on airport property. It is owned by the Chicago Department of Aviation and operated under an agreement with Hilton Hotels, who extended their agreement with the city by ten years in 2018.{{cite web |last1=Hinz |first1=Greg |title=City inks new deal with Hilton to run upgraded O'Hare hotel |url=https://www.chicagobusiness.com/greg-hinz-politics/city-inks-new-deal-hilton-run-upgraded-ohare-hotel |website=chicagobusiness.com |date=October 30, 2018 |publisher=Crain Communications, Inc. |access-date=April 10, 2019 |archive-url=https://web.archive.org/web/20190407081705/https://www.chicagobusiness.com/greg-hinz-politics/city-inks-new-deal-hilton-run-upgraded-ohare-hotel |archive-date=April 7, 2019 |url-status=live }}

The Airport Transit System shuttles passengers between the terminal core (Terminals 1–3), Terminal 5, and the O'Hare Multi-Modal Facility (MMF).{{cite web |title=Transportation Between Terminals |url=https://www.flychicago.com/ohare/ServicesAmenities/services/Pages/tbt.aspx |access-date=November 9, 2021 |archive-date=November 9, 2021 |archive-url=https://web.archive.org/web/20211109133511/https://www.flychicago.com/ohare/ServicesAmenities/services/Pages/tbt.aspx |url-status=live }} The system, which re-opened on November 3, 2021, resumed round-the-clock service starting at 5 a.m. on Monday, April 18, 2022,{{cite web|url=

https://www.chicago.gov/city/en/depts/doa/provdrs/dbata/news/2022/april/04142022.html | title=O'Hare Airport Transit System (ATS) Returns To 24-Hour Service - Chicago Department of Aviation | publisher=Chicago.gov

}} after a nearly six-year renovation.{{cite web |url=https://chicago.cbslocal.com/2021/11/02/ohare-people-mover-reopens-behind-schedule-over-budget/ |title=O'Hare People Mover To Start Running Again Wednesday, Years Behind Schedule And Millions Over Budget – CBS Chicago |publisher=Chicago.cbslocal.com |date=November 2, 2021 |access-date=January 12, 2022 |archive-date=November 9, 2021 |archive-url=https://web.archive.org/web/20211109041645/https://chicago.cbslocal.com/2021/11/02/ohare-people-mover-reopens-behind-schedule-over-budget/ |url-status=live }} Meanwhile, free shuttle buses also continue to run 24/7 and contribute to congestion, boarding on the upper (departures) level of all terminals. The Bus Shuttle center, located on the ground level of the parking garage between Terminals 1–3 and directly opposite the Hilton Hotel, provides a temporary boarding location for local hotel shuttles and regional public transport buses.{{cite web |title=Multi-Modal Facility |url=https://www.flychicago.com/ohare/tofrom/MultimodalFacility/pages/default.aspx |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=March 9, 2019 |archive-url=https://web.archive.org/web/20181120095347/https://www.flychicago.com/ohare/tofrom/MultimodalFacility/Pages/default.aspx |archive-date=November 20, 2018 |url-status=live }} The O'Hare Multi-Modal Facility is the home of all on-airport car rental firms as well as some extended parking. In addition, the Chicago-area commuter rail system, Metra, has a transfer station of its North Central Service (NCS) located at the northeast corner of the MMF; however, the NCS currently operates an occasional schedule on weekdays only.{{cite web |title=Maps and Schedules - NCS |url=https://metrarail.com/maps-schedules/train-lines/NCS |website=metrarail.com |publisher=Commuter Rail Division of the Regional Transportation Authority |access-date=July 15, 2019 |archive-url=https://web.archive.org/web/20190419111926/https://metrarail.com/maps-schedules/train-lines/NCS |archive-date=April 19, 2019 |url-status=live }}

The CTA Blue Line's north terminus is at {{cta|O'Hare}} and provides direct service to downtown via the Milwaukee–Dearborn subway in the Loop and continuing to west suburban Forest Park. Trains depart at intervals ranging from every four to thirty minutes, 24 hours a day.{{cite web |title=Blue Line 'L' |url=https://www.transitchicago.com/assets/1/6/rail-tt_blue.pdf |website=transitchicago.com |publisher=Chicago Transit Authority |access-date=January 25, 2020 |archive-date=October 25, 2018 |archive-url=https://web.archive.org/web/20181025150111/https://www.transitchicago.com/assets/1/6/rail-tt_blue.pdf |url-status=live }} The station is located on the lower level of the parking garage, and can be accessed directly from Terminals{{nbsp}}1–3 via tunnel and from Terminal{{nbsp}}5 via shuttle bus.

Pace, Peoria Charter, Van Galder Bus Company, and Wisconsin Coach Lines operate bus service to O'Hare, stopping at the MMF.

O'Hare is directly served by Interstate 190, which offers interchanges with Mannheim Road (U.S. 12 and 45), the Tri-State Tollway (Interstate 294), and Interstate 90. I-90 continues as the Kennedy Expressway into downtown Chicago and becomes the Jane Addams Memorial Tollway northwest to Rockford and the Wisconsin state line.

There are presently two main cargo areas at O'Hare. The South Cargo Area was relocated in the 1980s from the airport's first air cargo facilities, located east of the terminal core, where Terminal{{nbsp}}5 now stands. Many of the structures in this new cargo area then had to be rebuilt, again, to allow for the OMP and specifically runway 10R/28L; as a result, what is now called the South Cargo Area is located between 10R/28L and 10C/28C. This large collection of facilities, in three sections (Southwest, South Central, and Southeast), was established mainly by traditional airline-based air cargo; Air France Cargo, American, JAL Cargo, KLM, Lufthansa Cargo, Northwest and United all built purpose-built, freestanding cargo facilities,{{cite web|title=Chicago O'Hare International Airport: Advanced Airfield Familiarization Manual|url=http://app.flychicago.com/badging/advanced_airfield_familiarization_9.2016.pdf|website=flychicago.com|publisher=Chicago Department of Aviation|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402163510/http://app.flychicago.com/badging/advanced_airfield_familiarization_9.2016.pdf|archive-date=April 2, 2018|url-status=live}} although some of these are now leased out to dedicated cargo firms. In addition, the area contains two separate facilities for shipper FedEx and one for UPS.

The Northeast Cargo Area (NEC) is a conversion of the former military base (the Douglas plant area) at the northeast corner of the airport property. It is a new facility designed to increase O'Hare's cargo capacity by 50%. Two buildings currently make up the NEC: a {{convert|540000|sqft|m2}} building completed in 2016,{{cite web |last=Desormeaux |first=Hailey |url=https://www.americanshipper.com/main/news/ohare-opens-new-cargo-center-66358.aspx |title=O'Hare opens new cargo center | News |publisher=American Shipper |date=December 22, 2016 |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20171222051329/https://www.americanshipper.com/main/news/ohare-opens-new-cargo-center-66358.aspx |archive-date=December 22, 2017 |url-status=live }} and a {{convert|240000|sqft|m2}} building that was completed in 2017.{{cite web |author=DVV Media Group GmbH |url=http://www.aircargonews.net/news/airport/single-view/news/chicago-opens-second-phase-of-cargo-expansion.html |title=Chicago opens second phase of cargo expansion ǀ Air Cargo News |date=August 22, 2017 |publisher=Aircargonews.net |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20171222052920/http://www.aircargonews.net/news/airport/single-view/news/chicago-opens-second-phase-of-cargo-expansion.html |archive-date=December 22, 2017 |url-status=live }} A third structure will complete the NEC with another {{convert|150000|sqft|m2}} of warehouse space.{{cite web|last1=Burns|first1=Justin|title=Chicago O'Hare opens second phase of new cargo facility|url=https://www.aircargoweek.com/chicago-ohare-opens-phase-cargo-facility/|website=aircargoweek.com|date=August 23, 2017|publisher=Azura International|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402102248/https://www.aircargoweek.com/chicago-ohare-opens-phase-cargo-facility/|archive-date=April 2, 2018|url-status=live}}

The current capability of the cargo areas provide {{convert|2|e6sqft|m2}} of airside cargo space with parking for 40 wide-body freighters matched with over {{convert|2|e6sqft|m2}} of landside warehousing capability. O'Hare shipped over {{convert|1700000|t|short ton|abbr=off}} in 2018, fifth among airports in the U.S.{{cite web |title=Year-To-Date Operations, Passengers, Cargo Summary By Class; As of December 2018; O'Hare International Airport |url=https://www.flychicago.com/business/CDA/factsfigures/Pages/airtraffic.aspx |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=July 15, 2019 |archive-url=https://web.archive.org/web/20190914012140/https://www.flychicago.com/business/CDA/factsfigures/Pages/airtraffic.aspx |archive-date=September 14, 2019 |url-status=live }} (Select: O'Hare / 2081 / December)

In 2011, O'Hare became the first major airport to build an apiary on its property; every summer, it hosts as many as 75 hives and a million bees. The bees are maintained by 30 to 40 ex-offenders with little to no work experience and few marketable skills; they are primarily recruited from Chicago's North Lawndale neighborhood. They are taught beekeeping but also benefit from the bees' labor, turning it into bottled fresh honey, soaps, lip balms, candles and moisturizers marketed under the [https://beelovebuzz.com/ beelove] product line.{{cite web |title=beelove link |url=https://beelovebuzz.com/ |website=beelove |publisher=Sweet Beginnings, LLC |access-date=July 15, 2019 |archive-url=https://web.archive.org/web/20190715012727/https://beelovebuzz.com/ |archive-date=July 15, 2019 |url-status=live }}{{cite web|last1=Baskas|first1=Harriet|title=Bee colonies take flight once more, with some help from airport apiaries|url=https://www.cnbc.com/2017/08/04/bee-colonies-take-flight-once-more-with-some-help-from-airport-apiaries.html|website=cnbc.com|date=August 6, 2017|publisher=CNBC, LLC|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402163501/https://www.cnbc.com/2017/08/04/bee-colonies-take-flight-once-more-with-some-help-from-airport-apiaries.html|archive-date=April 2, 2018|url-status=live}} More than 500 persons have completed the program, transferring to jobs in manufacturing, food processing, customer service, and hospitality; the repeat-offender rate is reported to be less than 10%.{{cite web|title=Apiary: The First Major On-Airport Apiary in the U.S.|url=http://www.flychicago.com/community/environment/apiary/pages/default.aspx|website=flychicago.com|publisher=Chicago Department of Aviation|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402163336/http://www.flychicago.com/community/environment/apiary/pages/default.aspx|archive-date=April 2, 2018|url-status=live}}

The CDA's Airport Airfield Operations section is based out of the {{cvt|150|ft|-1}} tall prototype tower architect I.M. Pei designed for the FAA in the 1960s -1970s.

Resthaven Cemetery, which predates the airport, is situated across from the FedEx facility. Over 300 people are interred at Resthaven, which was allowed to remain on the airport grounds post-OMP while another cemetery, St. Johannes, had to be relocated.{{Cite web |last=Meriwether|first=Andrew |date=2025-03-12 |title= Why is there a cemetery at O'Hare Airport? |url= https://www.wbez.org/curious-city/2025/03/12/why-is-there-a-cemetery-at-ohare-airport |access-date=2025-03-13 |website=WBEZ |language=en-US}}

{{Airport destination list | 3rdcoltitle = Refs | 3rdcolunsortable=yes

| Aer Lingus | Dublin | {{cite web|url=https://www.aerlingus.com/html/flights-time-table.html|title=Timetables|publisher=Aer Lingus|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170219100623/https://www.aerlingus.com/html/flights-time-table.html|archive-date=February 19, 2017|url-status=live}}

| Aeroméxico | Guadalajara, Mexico City | {{cite web|url=https://booking.aeromexico.com/SSW2010/D5DE/flightSchedulePage.html|title=Timetables|publisher=Aeroméxico|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20181119011305/https://booking.aeromexico.com/SSW2010/D5DE/flightSchedulePage.html|archive-date=November 19, 2018|url-status=live}}

| Air Canada | Montréal–Trudeau, Toronto–Pearson, Vancouver | {{cite web|url=https://www.aircanada.com/ca/en/aco/home/book/routes-and-partners/flight-schedules.html|title=Flight Schedules|publisher=Air Canada|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180323072516/https://www.aircanada.com/ca/en/aco/home/book/routes-and-partners/flight-schedules.html|archive-date=March 23, 2018|url-status=live}}

| Air Canada Express | Montréal–Trudeau, Toronto–Pearson | {{cite web|url=https://www.aircanada.com/ca/en/aco/home/book/routes-and-partners/flight-schedules.html|title=Flight Schedules|publisher=Air Canada|access-date=Feb 10, 2025}}

| Air France | Paris–Charles de Gaulle | {{cite web|url=http://www.airfrance.ca/CA/en/local/resainfovol/horaires/horaires.do|title=Air France flight schedule|publisher=Air France|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171116223753/https://www.airfrance.ca/CA/en/local/resainfovol/horaires/horaires.do|archive-date=November 16, 2017|url-status=live}}

| Air India | Delhi | {{cite web|url=https://aviationsourcenews.com/airline/usa-bound-air-india-continues-its-march-of-progress/|title=USA-bound: Air India continues its march of progress|publisher=Aviation Source News|date=February 29, 2024|accessdate=April 15, 2024}}

| Air New Zealand | Auckland (suspended){{cite web |title=Air New Zealand Extends Chicago Suspension into 2Q25 |url=https://www.aeroroutes.com/eng/240419-nz2q25ord |website=Aeroroutes |access-date=19 April 2024}} | {{cite web|title=Flight schedules – Air New Zealand|url=https://www.airnewzealand.co.nz/flight-schedules|access-date=March 27, 2018|archive-url=https://web.archive.org/web/20180925185414/https://www.airnewzealand.co.nz/flight-schedules|archive-date=September 25, 2018|url-status=live}}

| Air Serbia | Belgrade | {{cite web | url=https://www.exyuaviation.com/2022/11/air-serbia-schedules-chicago-launch.html | title=Air Serbia schedules Chicago launch | date=November 17, 2022 }}

| Alaska Airlines | Anchorage, Portland (OR), San Diego (begins October 4, 2025),{{cite web |title=Alaska Airlines Fall 2025 Network Adjustments |url=https://www.aeroroutes.com/eng/250422-asfall25 |website=Aeroroutes |access-date=22 April 2025}} San Francisco (ends August 20, 2025),{{cite web |url= https://airlinegeeks.com/2025/04/19/alaska-axes-four-routes/ |title= Alaska Axes Four Routes|date=April 19, 2025|access-date=April 20, 2025|website=AirlineGeeks }} Seattle/Tacoma | {{cite news|title=Flight Timetable|newspaper=Alaska Airlines|url=https://www.alaskaair.com/content/travel-info/timetables.aspx|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170202123138/https://www.alaskaair.com/content/travel-info/timetables.aspx|archive-date=February 2, 2017|url-status=live|last1=Airlines|first1=Alaska}}{{cite web |url=https://ancairport.com/flights/destinations/ |access-date=February 20, 2023 |title=Destinations |website=Ted Stevens Anchorage International Airport |archive-url=https://web.archive.org/web/20230131124443/https://ancairport.com/flights/destinations/ |archive-date=January 31, 2023 |url-status=live}}

| All Nippon Airways | Tokyo–Haneda, Tokyo–Narita | {{cite web|title=Timetables [International Routes]|url=https://www.ana.co.jp/en/us/book-plan/airinfo/timetable/international/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180624092943/https://www.ana.co.jp/en/us/book-plan/airinfo/timetable/international/|archive-date=June 24, 2018|url-status=live}}

| American Airlines | Albuquerque, Atlanta, Austin, Boston, Cancún, Charlotte, Cleveland, Dallas/Fort Worth, Denver, Des Moines, Fort Lauderdale, Fort Myers, Grand Rapids, Hartford, Honolulu (resumes October 26, 2025),{{cite web |title=American to Resume Its Longest Domestic Route |url=https://www.airwaysmag.com/new-post/american-resume-longest-domestic |website=Airways |access-date=21 February 2025}} Houston–Intercontinental, Indianapolis, Kansas City, Las Vegas, London–Heathrow, Los Angeles, Miami, Minneapolis/St. Paul, Montego Bay, Newark, New Orleans, New York–JFK, New York–LaGuardia, Orange County (CA), Orlando, Philadelphia, Phoenix–Sky Harbor, Punta Cana, Raleigh/Durham, Sacramento, St. Louis, Salt Lake City, San Antonio, San Diego, San Francisco, San José del Cabo, San Juan, Seattle/Tacoma, Spokane (begins June 5, 2025),{{cite web|url=https://www.kxly.com/news/lilac-to-windy-spokane-airport-to-have-daily-direct-flights-to-chicago/article_12c7663a-bbf6-11ef-9de6-2761c8457ef6.html|title=Lilac to Windy City: Spokane Airport to have daily, direct flights to Chicago|publisher=KXLY|date=December 16, 2024|accessdate=February 22, 2025}} Tampa, Tucson, Washington–National, West Palm Beach
Seasonal: Anchorage,{{cite web|url=https://www.aeroroutes.com/eng/241108-aa3q25ordanc|title=American Airlines 3Q25 Chicago - Anchorage Aircraft Changes|publisher=AeroRoutes|date=November 8, 2024|accessdate=November 14, 2024}} Aruba,{{cn|date=May 2025}} Athens,{{cite web |title=American Airlines More International Schedule Changes for Summer 2025 |date=February 2025 |url=https://aviationa2z.com/index.php/2025/02/01/american-airlines-international-schedule-changes-for-summer-2025/}} Baltimore,{{cn|date=May 2025}} Barcelona, Bozeman,{{cn|date=May 2025}} Buffalo,{{cn|date=May 2025}} Calgary,{{cn|date=May 2025}} Charleston (SC),{{cn|date=May 2025}} Cozumel,{{cn|date=May 2025}} Curaçao (begins December 6, 2025), Destin/Fort Walton Beach,{{cn|date=May 2025}} Detroit,{{cn|date=May 2025}} Dublin, Eagle/Vail,{{cn|date=May 2025}} Glacier Park/Kalispell,{{cn|date=May 2025}} Grand Cayman,{{cn|date=May 2025}} Guatemala City (resumes November 6, 2025), Jackson Hole,{{cn|date=May 2025}} Jacksonville (FL),{{cn|date=May 2025}} Liberia (CR),{{cn|date=May 2025}} Madrid,{{cite web|url=https://www.travelandleisure.com/chicago-philadelphia-and-charlotte-are-all-getting-new-flights-to-europe-on-american-airlines-8706828|title=American Airlines Is Adding 5 New Routes to Europe — See Where|website=Travel+Leisure|date=September 5, 2024|accessdate=September 5, 2024}} Naples,{{cite web |title=American Airlines NS25 Intercontinental Network Changes – 03NOV24 |url=https://www.aeroroutes.com/eng/241104-aans25inc |website=Aeroroutes |access-date=4 November 2024}} Nashville,{{cn|date=May 2025}} Nassau,{{cn|date=May 2025}} Omaha,{{cn|date=May 2025}} Palm Springs,{{cn|date=May 2025}} Paris–Charles de Gaulle,{{cn|date=May 2025}} Pittsburgh,{{cn|date=May 2025}} Portland (OR),{{cn|date=May 2025}} Providence,{{cn|date=May 2025}} Providenciales,{{cn|date=May 2025}} Puerto Vallarta,{{cn|date=May 2025}} Rome–Fiumicino,{{cn|date=May 2025}} San José (CR) (resumes November 2, 2025), St. Croix (begins December 6, 2025), St. Maarten (begins November 8, 2025), St. Thomas,{{cn|date=May 2025}} Sarasota,{{cn|date=May 2025}} Savannah,{{cn|date=May 2025}} Vancouver{{cn|date=May 2025}} | {{cite web|title=Flight schedules and notifications|url=https://www.aa.com/travelInformation/flights/schedule|access-date=December 17, 2024|archive-url=https://web.archive.org/web/20170202010611/https://www.aa.com/travelInformation/flights/schedule|archive-date=February 2, 2017|url-status=live}}

| American Eagle | Akron/Canton (begins October 6, 2025),{{cite web|url=https://www.travelandtourworld.com/news/article/united-states-costa-rica-guatemala-new-american-airlines-expansion-at-chicago-ohare-enhances-international-tourism-connections/|title=United States, Costa Rica, Guatemala: New American Airlines Expansion at Chicago O'Hare Enhances International Tourism Connections|website=Travel and Tour World|date=May 2, 2025|accessdate=May 3, 2025}} Albany, Appleton, Asheville, Aspen, Atlanta, Austin, Baltimore, Bangor, Birmingham (AL), Bismarck (resumes June 5, 2025), Bloomington/Normal, Boise (resumes June 5, 2025),{{Cite web |last=Velani |first=Bhavya |date=2024-11-23 |title=American Airlines Adds Three and Cuts Six Routes While United Adds 3 and Drops 4 |url=https://aviationa2z.com/index.php/2024/11/23/american-airlines-united-drops-three-new-routes/ |access-date=2024-11-25 |website=Aviation A2Z |language=en-US}} Boston, Buffalo, Cedar Rapids/Iowa City, Champaign/Urbana, Charleston (SC), Chattanooga (resumes October, 6 2025),{{Cite web |title=American Airlines Resumes Chicago – Chattanooga From Oct 2025 |url=https://www.aeroroutes.com/eng/250528-aaoct25ordcha |access-date=2025-05-28 |website=AeroRoutes |language=en-CA}} Cincinnati, Cleveland, Colorado Springs (resumes June 5, 2025),{{Cite web |date=2024-12-10 |title=American Airlines to Restore Service to Chicago from Colorado Springs |url=https://www.aviationpros.com/airports/news/55248561/american-airlines-to-restore-service-to-chicago-from-colorado-springs |access-date=2024-12-10 |website=Aviation Pros |language=en}} Columbia (MO), Columbus–Glenn, Dayton, Des Moines, Detroit, El Paso, Evansville,{{cite web | url=https://flyevv.com/about-evansville-regional-airport/news/new-nonstop-flights-to-chicago | title=NEW! Nonstop flights to Chicago! }} Fargo, Fayetteville/Bentonville, Flint, Fort Wayne, Grand Rapids, Green Bay, Greensboro, Greenville/Spartanburg, Harrisburg, Hartford, Huntsville, Indianapolis, Jacksonville (FL), Kalamazoo, Kansas City, Knoxville, La Crosse, Lansing, Lexington, Little Rock, Louisville, Madison, Manhattan (KS), Marquette, Memphis, Milwaukee, Minneapolis/St. Paul, Moline/Quad Cities, Nashville, Newark, New Orleans, Norfolk, Oklahoma City, Omaha, Peoria, Pittsburgh, Providence, Raleigh/Durham, Rapid City, Richmond, Roanoke (begins August 6, 2025), Rochester (MN), Rochester (NY), St. Louis, Salt Lake City, Sioux Falls, Springfield (IL), Springfield/Branson, Syracuse, Toronto–Pearson, Traverse City, Tulsa, Waterloo (IA), Wausau, White Plains, Wichita, Wilkes-Barre/Scranton
Seasonal: Albuquerque,{{cn|date=May 2025}} Billings,{{cn|date=May 2025}} Bozeman,{{cn|date=May 2025}} Burlington (VT),{{cn|date=May 2025}} Calgary,{{cn|date=May 2025}} Dallas/Fort Worth,{{cn|date=May 2025}} Halifax (begins June 21, 2025),{{cite news |last1=Shon |first1=Stella |title=American Airlines Adds Flights to Quebec, Calgary, Bozeman, and More From These U.S. Hubs |url=https://www.yahoo.com/lifestyle/american-airlines-adds-flights-quebec-174648790.html?guccounter=1 |access-date=24 December 2024 |work=Yahoo Life |publisher=Travel + Leisure |date=2024-12-23}} Hayden/Steamboat Springs,{{cite web |title=American Resumes Chicago – Hayden/Steamboat Springs From late-Dec 2023 |url=https://www.aeroroutes.com/eng/231002-aanw23ordhdn |website=Aeroroutes |access-date=October 2, 2023}} Hilton Head,{{cn|date=May 2025}} Houston–Intercontinental,{{cn|date=May 2025}} Hyannis (begins June 21, 2025),{{cite web|url=https://www.aeroroutes.com/eng/241010-aans25hya|title=AMERICAN AIRLINES EXPANDS CAPE COD SERVICE IN NS25|publisher=AeroRoutes|date=October 10, 2024|accessdate=October 10, 2024}} Idaho Falls (begins August 6, 2025),{{cite web |title=American Airlines launches seasonal Flights between Chicago and Idaho Falls |date=April 19, 2025 |url=https://www.jetsaver.com/blogs/american-airlines-launches-seasonal-flights-between-chicago-and-idaho-falls}} Key West,{{cn|date=May 2025}} Manchester (NH),{{cn|date=May 2025}} Martha's Vineyard,{{cn|date=May 2025}} Missoula,{{cn|date=May 2025}} Montréal–Trudeau,{{cn|date=May 2025}} Myrtle Beach,{{cn|date=May 2025}} Nantucket,{{cn|date=May 2025}} Panama City (FL),{{cn|date=May 2025}} Pensacola,{{cn|date=May 2025}} Portland (ME),{{cn|date=May 2025}} Quebec City,{{cn|date=May 2025}} Wilmington (NC){{cn|date=May 2025}} |

| Arajet | Punta Cana (begins November 15, 2025){{cite web | url= https://www.streetinsider.com/dr/news.php?id=24826516&gfv=1 | title= Arajet Announces Chicago O'Hare Route, Now Servicing Five Major U.S. Cities | date=20 May 2025 }} | {{cite web|title=Destinations|url= https://www.arajet.com/en/destinations|website=Arajet}}

| Austrian Airlines | Vienna | {{cite web|url=https://www.austrian.com/sk/Info/Flightinformation/Timetable?sc_lang=sk&cc=SK|title=Austrian Timetable|publisher=Austrian Airlines|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20190331094119/https://www.austrian.com/sk/Info/Flightinformation/Timetable?sc_lang=sk&cc=SK|archive-date=March 31, 2019|url-status=live}}

| Avelo Airlines | Seasonal: New Haven{{cite web|url= https://www.morningstar.com/news/pr-newswire/20250403da56860/avelo-airlines-opens-wilmington-nc-base-of-operations-inaugurates-7-new-nonstop-routes-and-adds-chicago-ohare|title= Avelo Airlines Opens Wilmington, N.C. Base of Operations, Inaugurates 7 New Nonstop Routes and Adds Chicago O'Hare|publisher=Morningstar|date=April 3, 2025|accessdate=April 3, 2025}} | {{cite web|url=https://www.aveloair.com/destinations/|title=Destinations|website=Avelo Airlines|access-date=January 18, 2022|archive-date=November 7, 2023|archive-url=https://web.archive.org/web/20231107173629/https://www.aveloair.com/destinations/|url-status=live}}

| Avianca | Bogotá | {{Cite web |last=Mazó |first=Edgardo Gimenez |date=2024-07-09 |title=Avianca to Operate Daily Flights Between Bogotá and Chicago |url=https://aviacionline.com/2024/07/avianca-to-operate-daily-flights-between-bogota-and-chicago/ |access-date=2024-07-09 |website=Aviacionline |language=es}}

| Avianca Costa Rica | Seasonal: Guatemala City,{{cn|date=May 2025}} San José (CR){{cite web |title=AVIANCA COSTA RICA RESUMES 2 US ROUTES FROM DEC 2023|url=https://www.aeroroutes.com/eng/230913-avdec23us |website=Aeroroutes |access-date=September 13, 2023}} | {{cite web |title=Check itineraries |url=https://www.avianca.com/br/en/electronic-services/check-itineraries/ |access-date=August 5, 2018}}

| Avianca El Salvador | Seasonal: San Salvador (resumes June 3, 2025) | {{cite web |url=https://www.aeroroutes.com/eng/250207-avns25salord| title=Avianca Resumes San Salvador-Chicago Service in NS25 | date= 7 February 2025 |publisher=aeroroutes.com}}

| British Airways | London–Heathrow | {{cite web|url=https://www.britishairways.com/travel/schedules/public/en_gb|title=Timetables|publisher=British Airways|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170330083400/https://www.britishairways.com/travel/schedules/public/en_gb|archive-date=March 30, 2017|url-status=live}}

| Cathay Pacific | Hong Kong{{cite web|url=https://www.aeroroutes.com/eng/230515-cxoct23ord|title=Cathay Pacific Resumes Chicago Service from Oct 2023|publisher=AeroRoutes|date=May 15, 2023|accessdate=May 15, 2023}} | {{cite web|url=https://www.cathaypacific.com/cx/en_CA/book-a-trip/timetable.html|title=Flight Timetable|publisher=Cathay Pacific|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170701155740/https://www.cathaypacific.com/cx/en_CA/book-a-trip/timetable.html|archive-date=July 1, 2017|url-status=live}}

| Contour Airlines | Burlington (IA) (begins July 1, 2025),{{cite web |title=Contour Airlines Adds Chicago – Burlington IA From July 2025 |url=https://www.aeroroutes.com/eng/250520-lf3q25ordbrl |website=Aeroroutes |access-date=20 May 2025}} Cape Girardeau,{{cite web |title=Contour Airlines October 2024 Network Additions |url=https://www.aeroroutes.com/eng/240725-lfoct24 |website=Aeroroutes |access-date=25 July 2024}} Fort Leonard Wood, Kirksville, Manistee,{{cite web |title=Contour Airlines Adds Chicago – Manistee Service From Oct 2024 |url=https://www.aeroroutes.com/eng/240924-lfoct24mbl |website=Aeroroutes |access-date=24 September 2024}} Marion, Owensboro
Seasonal: Lewisburg (WV){{Cite web |last=Report |first=WV News |date=2025-04-03 |title=New Direct Flights Make Traveling from Chicago to The Greenbrier Easier in 2025 |url=https://www.wvnews.com/news/wvnews/new-direct-flights-make-traveling-from-chicago-to-the-greenbrier-easier-in-2025/article_92654e1a-b5e0-4293-ac5e-0ed77ffb6405.html |access-date=2025-04-04 |website=WV News |language=en}}| {{Cite web|url=https://www.contourairlines.com/plan-and-book/items/route-map|title=Route Map|access-date=June 20, 2021|archive-date=June 24, 2021|archive-url=https://web.archive.org/web/20210624203032/https://www.contourairlines.com/plan-and-book/items/route-map|url-status=live}}

| Copa Airlines | Panama City–Tocumen | {{cite web|url=https://www.copaair.com/en/web/ca/timetables|title=Flight Schedule|publisher=Copa Airlines|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171109191849/https://www.copaair.com/en/web/ca/timetables|archive-date=November 9, 2017|url-status=live}}

| Delta Air Lines | Atlanta, Boston, Detroit, Minneapolis/St. Paul, New York–LaGuardia, Salt Lake City, Seattle/Tacoma | {{cite web|title=FLIGHT SCHEDULES|url=https://www.delta.com/flightinfo/viewFlightSchedulesSetup.action|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20150621123636/http://www.delta.com/flightinfo/viewFlightSchedulesSetup.action|archive-date=June 21, 2015|url-status=live}}

| Delta Connection | New York–JFK, New York–LaGuardia |

| Denver Air Connection | Dubuque,{{Cite web|url=https://www.kcrg.com/2024/08/27/live-commercial-air-service-return-dubuque-regional-airport/|title=Dubuque Regional Airport adds daily service to Chicago starting in November|access-date=August 27, 2024|website=KCRG|date=August 27, 2024 }} Ironwood, Jackson (TN),{{cite web |title=Denver Air Connection Adds Jackson Tennessee Service From Dec 2024 |url=https://www.aeroroutes.com/eng/240911-kgnw24mkl |website=Aeroroutes |access-date=11 September 2024}} Muskegon{{cite web|url=https://www.fox17online.com/news/local-news/lakeshore/muskegon/muskegon-county-airport-adding-denver-air-connection|title=Muskegon County Airport adding Denver Air Connection|website=Fox 17 News|date= September 19, 2024|accessdate=2024-09-20}} | {{cite web|url=https://denverairconnection.com/|title=Denver Air Connection - Reliable, On-Time Flights|website=Denver Air Connection|access-date=April 14, 2021|archive-date=April 15, 2021|archive-url=https://web.archive.org/web/20210415155721/https://denverairconnection.com/|url-status=live}}

| Emirates | Dubai–International | {{cite web|url=https://www.emirates.com/ca/english/destinations_offers/timetables/flightschedule.aspx|title=Flight Schedules|publisher=Emirates|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170630185434/https://www.emirates.com/ca/english/destinations_offers/timetables/flightschedule.aspx|archive-date=June 30, 2017|url-status=live}}

| Ethiopian Airlines | Addis Ababa | {{cite web|title=Schedule – Fly Ethiopian|url=https://www.ethiopianairlines.com/AA/EN/book/booking/flight-schedule|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20190331065638/https://www.ethiopianairlines.com/AA/EN/book/booking/flight-schedule|archive-date=March 31, 2019|url-status=live}}

| Etihad Airways | Abu Dhabi | {{cite web|url=http://www.etihad.com/en-ca/plan-and-book/flight-timetables/|title=Flight Timetables|publisher=Etihad Airways|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170421022706/http://www.etihad.com/en-ca/plan-and-book/flight-timetables/|archive-date=April 21, 2017|url-status=live}}

| EVA Air | Taipei–Taoyuan | {{cite web|url=https://booking.evaair.com/flyeva/EVA/B2C/flight-schedules.aspx|title=Timetables |publisher=EVA Air|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170516001221/http://booking.evaair.com/flyeva/EVA/B2C/flight-schedules.aspx|archive-date=May 16, 2017|url-status=live}}

| Finnair | Seasonal: Helsinki{{Cite web |title=Finnair NS25 Long-Haul Service Expansion – 21OCT24 |url=https://www.aeroroutes.com/eng/241021-ayns25inc |access-date=2025-01-31 |website=AeroRoutes |language=en-CA}} | {{cite web| title=Finnair flight timetable|url=https://www.finnair.com/at/gb/information-services/flights/timetable|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180612140402/https://www.finnair.com/at/gb/information-services/flights/timetable|archive-date=June 12, 2018|url-status=live}}

| Frontier Airlines | Atlanta, Austin,{{cite web |title=Frontier Airlines 1Q25 Various Network Resumptions |url=https://www.aeroroutes.com/eng/241120-f91q25 |website=Aeroroutes |access-date=20 November 2024}} Cancún, Charlotte,{{cite web |title=Frontier Airlines Announces New Routes, Expanding Operations Across 38 Airports |url=https://news.flyfrontier.com/frontier-airlines-announces-new-routes-expanding-operations-across-38-airports/ |website=Frontier |access-date=18 March 2025}} Dallas/Fort Worth, Denver, Fort Myers, Houston–Intercontinental,{{Cite web|url=https://news.flyfrontier.com/frontier-airlines-announces-17-new-routes-across-multiple-airports--spanning-the-us-and-caribbean/|title=Frontier Airlines Announces 17 New Routes Across Multiple Airports, Spanning the U.S. and Caribbean|website=Frontier Airlines Announces 17 New Routes Across Multiple Airports, Spanning the U.S. and Caribbean}} Las Vegas,{{cite web |title=Frontier Airlines 2Q24 Las Vegas Domestic Service Resumptions |url=https://www.aeroroutes.com/eng/240123-f92q24las |website=Aeroroutes |access-date=January 23, 2024}} Los Angeles,{{cite news |last1=Ewing |first1=Ryan |title=Frontier Adds 14 Routes, Returns to Two Airports |url=https://airlinegeeks.com/2025/02/18/frontier-adds-14-routes-returns-to-two-airports/ |access-date=18 March 2025 |work=Airline Geeks |date=18 February 2025}} Nashville,{{cite web|title=Frontier Airlines to expand Nashville service this spring.|website=The Tennessean |url=https://www.tennessean.com/story/news/local/2024/02/28/nashville-frontier-airlines-chicago-ohare-new-route/72771334007/}} Orlando, Philadelphia,{{cite web|title=Frontier Airlines increases summer schedule at PHL by 47% with 10 new routes|date=February 7, 2024 |url=https://www.bizjournals.com/philadelphia/news/2024/02/07/frontier-airlines-new-routes-phliadelphia-airport.html|access-date= February 7, 2024}} Phoenix–Sky Harbor, Punta Cana, Salt Lake City,{{Cite web|title=Frontier Airlines Announces New Routes, Expanding Operations Across 12 Airports|date=April 4, 2024|url=https://news.flyfrontier.com/frontier-airlines-announces-new-routes-expanding-operations-across-12-airports/|access-date= April 5, 2024}} San Diego (begins June 12, 2025),{{Cite web|title=Frontier Airlines Introducing three new routes through San Diego| access-date=March 25, 2025| url=https://fox5sandiego.com/news/business/frontier-airlines-introducing-three-new-routes-through-san-diego/amp/| archive-date=March 25, 2025 |archive-url=https://fox5sandiego.com/|url-status=live |website=FOX 5 San Diego KUSI news| date=March 25, 2025}} Sarasota, Tampa, West Palm Beach{{cite web | url=https://news.flyfrontier.com/frontier-airlines-announces-22-new-routes-launching-in-december/ | title=Frontier Airlines Announces 22 New Routes Launching in December}}
Seasonal: Baltimore (begins July 7, 2025){{cite web|title= Frontier Adds Baltimore-Chicago, Trenton-Myrtle Beach|url= https://www.airwaysmag.com/new-post/frontier-baltimore-chicago-trenton-myrtle-beach |website=Airways |access-date=May 6, 2025}} | {{cite web|title=Frontier|url=https://www.flyfrontier.com|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170912053526/https://www.flyfrontier.com/|archive-date=September 12, 2017|url-status=live}}

| Iberia | Madrid | {{cite web|title=Flight times – Iberia|url=https://www.iberia.com/gb/schedules/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180317232127/https://www.iberia.com/gb/schedules/|archive-date=March 17, 2018|url-status=live}}

| Icelandair | Reykjavík–Keflavík | {{cite web|url=http://www.icelandair.ca/information/travel-guide/timetable/|title=Flight Schedule|publisher=Icelandair|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171116064841/http://www.icelandair.ca/information/travel-guide/timetable/|archive-date=November 16, 2017|url-status=live}}

| ITA Airways | Seasonal: Rome–Fiumicino{{cite web |last1=Liu |first1=Jim |title=ITA Airways Schedules Chicago April 2024 Launch |url=https://www.aeroroutes.com/eng/231012-azns24ord |website=aeroroutes.com |access-date=4 February 2025 |date=12 October 2023}} | {{cite web|url=https://www.itaspa.com/en_it/fly-ita/ita-world/network.html|title=ITA AIRWAYS WORLD|website=Itaspa.com|access-date=February 22, 2022}}

| Japan Airlines | Tokyo–Haneda, Tokyo–Narita{{cite web|url=https://airlinegeeks.com/2025/01/21/japan-airlines-to-expand-u-s-network/|title=Japan Airlines to Expand U.S. Network|publisher=Airline Geeks|date=January 21, 2025|accessdate=January 21, 2025}} | {{cite web|title=Japan Airlines Timetables|url=http://www.jal.co.jp/en/inter/route/time/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20181015202347/http://www.jal.co.jp/en/inter/route/time/|archive-date=October 15, 2018|url-status=live}}

| JetBlue | Boston, New York–JFK | {{cite web |title=Where We Jet: Flight Destinations |url=https://www.jetblue.com/route-map/?origin=ORD |website=JetBlue.com |publisher=JetBlue Airways |access-date=January 16, 2020 |archive-date=April 6, 2023 |archive-url=https://web.archive.org/web/20230406143432/https://www.jetblue.com/route-map/?origin=ORD |url-status=dead }}

| KLM | Amsterdam | {{cite web|url=https://www.klm.com/travel/ca_en/prepare_for_travel/up_to_date/timetable/index.htm|title=View the Timetable|publisher=KLM|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170912011516/https://www.klm.com/travel/ca_en/prepare_for_travel/up_to_date/timetable/index.htm|archive-date=September 12, 2017|url-status=live}}

| Korean Air | Seoul–Incheon | {{cite web|url=https://www.koreanair.com/global/en/booking/schedule-flight.html#schedule|title=Flight Status and Schedules|publisher=Korean Air|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180628234008/https://www.koreanair.com/global/en/booking/schedule-flight.html#schedule|archive-date=June 28, 2018|url-status=live}}

| LOT Polish Airlines | Kraków, Warsaw–Chopin | {{cite web|url=http://www.lot.com/lt/en/flights-schedule|title=Timetables|publisher=LOT Polish Airlines|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170506070656/http://www.lot.com/lt/en/flights-schedule|archive-date=May 6, 2017|url-status=live}}

| Lufthansa | Frankfurt, Munich | {{cite web|url=http://www.lufthansa.com/ca/en/Online-timetable|title=Timetable – Lufthansa Canada|publisher=Lufthansa|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171109191434/http://www.lufthansa.com/ca/en/Online-timetable|archive-date=November 9, 2017|url-status=live}}

| Qatar Airways | Doha | {{cite web|title=Flight timetable|url=https://booking.qatarairways.com/nsp/views/timeTableIndex.xhtml|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171004005550/https://booking.qatarairways.com/nsp/views/timeTableIndex.xhtml|archive-date=October 4, 2017|url-status=live}}

| Royal Jordanian | Amman–Queen Alia | {{cite web| title=Route Map| url=http://www.rj.com/en/destinations/route_map| publisher=Royal Jordanian Airlines| access-date=April 5, 2017| archive-url=https://web.archive.org/web/20180805082904/https://www.rj.com/en/destinations/route_map| archive-date=August 5, 2018| url-status=dead}}

| Scandinavian Airlines | Copenhagen | {{cite web|title=Timetable – SAS|url=https://www.flysas.com/en/us/Generic/Services/Timetable/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180317232132/https://www.flysas.com/en/us/Generic/Services/Timetable/|archive-date=March 17, 2018|url-status=live}}

| Southern Airways Express | Burlington (IA) (ends June 30, 2025),{{Cite web|url=https://www.regulations.gov/document/DOT-OST-2001-8731-0178|title=Regulations.gov|website=www.regulations.gov}} Quincy, West Lafayette{{Cite web|url=https://www.basedinlafayette.com/p/return-of-passenger-flights-out-of|title= Return of passenger flights out of Purdue set for May 15 |website=basedinlafayette.com |date= February 3, 2024 |access-date=February 5, 2024}} | {{cite web |url=https://iflysouthern.com/ |title=Southern Route Map |publisher=Southern Airways Express |access-date=October 31, 2022 }}

| Southwest Airlines | Austin, Baltimore, Cancún, Dallas–Love, Denver, Las Vegas, Nashville, Orlando, Phoenix–Sky Harbor | {{cite web |title=Southwest Airlines - Check Flight Schedules |url=https://www.southwest.com/air/flight-schedules/ |access-date=February 15, 2021 |archive-date=October 13, 2020 |archive-url=https://web.archive.org/web/20201013193450/https://www.southwest.com/air/flight-schedules/ |url-status=live }}

| Spirit Airlines | Baltimore,{{Cite web|url=https://aviationa2z.com/index.php/2025/03/08/spirit-airlines-expands-with-20-new-routes-cuts-5-destinations/ |title=Spirit Airlines Expands with 20+ New Routes |date=March 7, 2025 |publisher=Aviation A2Z |accessdate=March 7, 2025 |archive-url=https://web.archive.org/web/20250308025823/https://aviationa2z.com/index.php/2025/03/08/spirit-airlines-expands-with-20-new-routes-cuts-5-destinations/ |archive-date=2025-03-08 |url-status=live}} Cancún, Dallas/Fort Worth, Fort Lauderdale, Fort Myers, Houston–Intercontinental, Las Vegas, Los Angeles, Miami, New Orleans, New York–LaGuardia, Nashville, Newark,{{cite web |title=Spirit Airlines June/July 2024 Latest Network Additions |url=https://www.aeroroutes.com/eng/240410-nkjun24 |website=Aeroroutes |access-date=10 April 2024}} Orlando, San Juan, Tampa
Seasonal: Myrtle Beach,{{cn|date=May 2025}} Phoenix–Sky Harbor{{cn|date=May 2025}} | {{cite web| title=Where We Fly| url=https://www.spirit.com/RouteMaps.aspx| publisher=Spirit Airlines| access-date=March 17, 2018| archive-url=https://web.archive.org/web/20171223042503/https://www.spirit.com/routemaps.aspx| archive-date=December 23, 2017| url-status=live}}

| Sun Country Airlines | Minneapolis/St. Paul | {{cite web |title=Route Map & Flight Schedule |url=https://www.suncountry.com/Explore/Route-Map.html |access-date=March 17, 2018 |archive-url=https://web.archive.org/web/20180815090927/https://www.suncountry.com/Explore/Route-Map.html |archive-date=August 15, 2018 |url-status=live }}

| {{nowrap|Swiss International Air Lines}} | Zurich | {{cite web|title=Timetable|url=https://www.swiss.com/CH/EN/book/flight-information/timetable.html|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180317232924/https://www.swiss.com/CH/EN/book/flight-information/timetable.html|archive-date=March 17, 2018|url-status=live}}

| TAP Air Portugal | Lisbon | {{cite web| title=Flight Schedule| url=https://www.flytap.com/en-pt/| publisher=TAP Air Portugal| access-date=November 29, 2018| archive-url=https://web.archive.org/web/20181120084622/https://www.flytap.com/en-pt/| archive-date=November 20, 2018| url-status=live}}

| Turkish Airlines | Istanbul | {{cite web|url=https://www.turkishairlines.com/en-us/flights/|title=Online Flight Schedule|publisher=Turkish Airlines|access-date=April 8, 2019|archive-url=https://web.archive.org/web/20190410174518/https://www.turkishairlines.com/en-us/flights/|archive-date=April 10, 2019|url-status=live}}

| United Airlines | Albany, Albuquerque, Amsterdam, Aruba, Atlanta, Austin, Baltimore, Boston, Bozeman, Brussels, Buffalo, Burlington (VT), Calgary, Cancún, Cedar Rapids/Iowa City, Charleston (SC), Charlotte, Cincinnati, Cleveland, Columbus–Glenn, Dallas/Fort Worth, Denver, Des Moines, Detroit, Fort Lauderdale, Fort Myers, Frankfurt, Grand Rapids, Guatemala City, Harrisburg, Hartford, Honolulu, Houston–Intercontinental, Jacksonville (FL), Kahului, Kansas City, Las Vegas, London–Heathrow, Los Angeles, Madison, Memphis, Mexico City, Miami, Minneapolis/St. Paul, Montego Bay, Munich, Nashville, New Orleans, New York–LaGuardia, Newark, Norfolk, Omaha, Ontario,Velani, Bhavya [https://aviationa2z.com/index.php/2025/01/31/united-airlines-three-new-routes-from-chicago/ United Airlines Adds Three New Routes from Chicago], Aviation A to Z, January 31, 2025, retrieved 2025-01-31 Orange County (CA), Orlando, Paris–Charles de Gaulle, Pensacola (FL), Philadelphia, Phoenix–Sky Harbor, Pittsburgh, Portland (ME), Portland (OR), Puerto Vallarta, Punta Cana, Raleigh/Durham, Reno/Tahoe, Richmond, Rochester (NY), Sacramento, Salt Lake City, San Antonio, San Diego, San Francisco, San Jose (CA), San José del Cabo, San Juan, São Paulo–Guarulhos, Sarasota, Savannah, Seattle/Tacoma, Sioux Falls, St. Louis, Syracuse, Tampa, Tel Aviv (suspended),{{citation needed|date=February 2024}} Tokyo–Haneda, Toronto–Pearson, Traverse City, Vancouver, Washington–Dulles, Washington–National, Wichita, Zurich
Seasonal: Anchorage,{{cn|date=May 2025}} Athens,{{cite web|url=https://liveandletsfly.com/united-airlines-chicago-athens/|title=United Airlines Adds Chicago – Athens Service|language=English|date=January 24, 2024|accessdate=January 24, 2024}} Barcelona,{{cn|date=May 2025}} Belize City,{{cn|date=May 2025}} Boise,{{cn|date=May 2025}} Colorado Springs,{{cn|date=May 2025}} Cozumel,{{cn|date=May 2025}} Dublin,{{cn|date=May 2025}} Eagle/Vail,{{cn|date=May 2025}} Edinburgh,{{cn|date=May 2025}} Edmonton,{{cite web |title=United Resumes 2 Edmonton Routes From late-May 2025 |url=https://www.aeroroutes.com/eng/241125-uamay25yeg |website=Aeroroutes |access-date=25 November 2024}} Fairbanks,{{cn|date=May 2025}} Fresno,{{cn|date=May 2025}} Glacier Park/Kalispell,{{cn|date=May 2025}} Grand Cayman,{{cn|date=May 2025}} Greenville/Spartanburg,{{cn|date=May 2025}} Hayden/Steamboat Springs,{{cn|date=May 2025}} Indianapolis,{{cn|date=May 2025}} Ixtapa/Zihuatanejo,{{cn|date=May 2025}} Jackson Hole,{{cn|date=May 2025}} Key West,{{cn|date=May 2025}} Knoxville,{{cn|date=May 2025}} Liberia (CR),{{cn|date=May 2025}} Kailua-Kona,{{cn|date=May 2025}} Milan–Malpensa,{{cn|date=May 2025}} Missoula,{{cn|date=May 2025}} Montréal–Trudeau,{{cite web|url=https://www.flightconnections.com/flights-from-ord-to-yul|title=Direct flights from Chicago to Montreal|publisher=flightconnections.com|access-date=May 30, 2025}} Montrose,{{cn|date=May 2025}} Myrtle Beach,{{cn|date=May 2025}} Nassau,{{cn|date=May 2025}} Palm Springs,{{cn|date=May 2025}} Panama City (FL),{{cn|date=May 2025}} Providence,{{cn|date=May 2025}} Providenciales,{{cn|date=May 2025}} Rapid City,{{cn|date=May 2025}} Reykjavík–Keflavík,{{cn|date=May 2025}} Rome–Fiumicino,{{cn|date=May 2025}} St. Lucia–Hewanorra,{{cn|date=May 2025}} St. Maarten,{{cn|date=May 2025}} St. Thomas,{{cn|date=May 2025}} San José (CR),{{cn|date=May 2025}} Shannon,{{cn|date=May 2025}} Tucson,{{cn|date=May 2025}} West Palm Beach{{cn|date=May 2025}} | {{cite web|title=Timetable|url=https://www.united.com/web/en-US/apps/travel/timetable/default.aspx|publisher=United Airlines Holdings|location=Chicago|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170128165254/https://www.united.com/web/en-US/apps/travel/timetable/default.aspx|archive-date=January 28, 2017|url-status=live}}

| United Express | Akron/Canton, Albany, Allentown, Appleton, Asheville, Billings, Birmingham (AL), Boise, Buffalo, Cedar Rapids/Iowa City, Charleston (SC), Charleston (WV), Charlottesville (VA), Chattanooga, Cincinnati, Cleveland, Colorado Springs, Columbia (MO) (resumes September 25, 2025),{{Cite web|title=United sets service to COU to resume|url=https://www.komu.com/news/midmissourinews/united-airlines-returning-to-cou-with-flights-to-denver-chicago/article_1b3692a9-12a5-4c2e-9b67-1a4c45454b46.html}} Columbia (SC), Columbus–Glenn, Dayton, Decatur, Des Moines, Detroit, Eau Claire,{{cite news |last1=Shill |first1=Kristen |title=US DOT chooses SkyWest to service Chippewa Valley Regional Airport |url=https://www.wqow.com/eye-on-eau-claire/us-dot-chooses-skywest-to-service-chippewa-valley-regional-airport/article_3748b128-7072-11ef-954f-6bf57a7fa599.html |access-date=18 March 2025 |work=WQOW |date=11 September 2024}}{{cite web |title=Volaire Aviation Consulting (SkyWest Start Date) |url=https://www.regulations.gov/document/DOT-OST-2009-0306-0076 |website=Department of Transportation |access-date=18 March 2025}} Duluth, El Paso, Fargo, Fayetteville/Bentonville, Flint, Fort Dodge, Fort Wayne, Grand Rapids, Green Bay, Greensboro, Greenville/Spartanburg, Gunnison/Crested Butte,{{cite news |title=United Express NW24 Domestic Service Additions |website=Aeroroutes |url=https://www.aeroroutes.com/eng/241010-uanw24express |access-date=10 October 2024}} Harrisburg, Houghton, Huntsville, Indianapolis, Johnstown (PA), Kansas City, Knoxville, Lexington, Lincoln, Little Rock, Louisville, Madison, Mason City, Memphis, Milwaukee, Moline/Quad Cities, Montréal–Trudeau, Monterrey, Morgantown (WV),{{cite web | title=SkyWest to begin flying out of Morgantown in December | website=The Dominion Post | url=https://www.dominionpost.com/2024/09/17/haws-citys-new-air-carrier-to-take-off-this-year/ | ref={{sfnref | The Dominion Post}} | access-date=2024-09-23}} Nashville, New Orleans, Oklahoma City, Omaha, Ottawa, Peoria, Pittsburgh, Portland (ME), Providence, Richmond, Roanoke, Rochester (NY), Saginaw, St. Louis, Salina, Savannah, Sioux City, Sioux Falls, South Bend, Springfield/Branson, State College, Syracuse, Toronto–Pearson, Traverse City, Tucson, Tulsa, Watertown (SD),{{Cite web|url=https://www.regulations.gov/document/DOT-OST-2011-0138-0150|title=Regulations.gov|website=www.regulations.gov}} West Lafayette (begins August 5, 2025),{{Cite web|url=https://www.purdueexponent.org/campus/general_news/purdue-skywest-flight-united/article_6baf8abb-697f-41da-9606-aef3f5422285.html|title= Purdue, SkyWest to start new commercial flights to Chicago |website=purdueexponent.org |date= April 4, 2025 |access-date=April 4, 2025}} Wichita, Wilkes-Barre/Scranton, Winnipeg{{cite web |title=United to resume direct flights between Winnipeg and both Denver, Chicago in May |url=https://www.cbc.ca/news/canada/manitoba/chicago-denver-flights-return-winnipeg-1.7093889|website=CBC News |access-date=January 25, 2024}}
Seasonal: Albuquerque,{{cn|date=May 2025}} Aspen,{{cn|date=May 2025}} Bangor,{{cn|date=May 2025}} Bozeman,{{cn|date=May 2025}} Burlington (VT),{{cn|date=May 2025}} Glacier Park/Kalispell,{{cn|date=May 2025}} Great Falls,{{cn|date=May 2025}} Halifax, Harlingen,{{cite web | url=https://www.krgv.com/news/aeropuerto-internacional-de-harlingen-anuncia-dos-nuevas-rutas-sin-escala | title=Aeropuerto Internacional de Harlingen anuncia dos nuevas rutas sin escala | date=November 29, 2023 }} Hartford,{{cn|date=May 2025}} Hayden/Steamboat Springs,{{cn|date=May 2025}} Hilton Head,{{cn|date=May 2025}} Jacksonville (FL),{{cn|date=May 2025}} Joplin,{{cn|date=May 2025}} Key West,{{cn|date=May 2025}} Minneapolis/St. Paul,{{cn|date=May 2025}} Montrose,{{cn|date=May 2025}} Myrtle Beach,{{cn|date=May 2025}} Nantucket,{{cn|date=May 2025}} New York–LaGuardia,{{cn|date=May 2025}} Norfolk,{{cn|date=May 2025}} Panama City (FL),{{cn|date=May 2025}} Pellston, Pensacola (FL),{{cn|date=May 2025}} Québec City,{{cite web |title=United Resumes Winnipeg and Chicago – Quebec in NS24 |url=https://www.aeroroutes.com/eng/240126-uans24ca |website=Aeroroutes |access-date=January 26, 2024}} Raleigh/Durham,{{cn|date=May 2025}} Rapid City,{{cn|date=May 2025}} Rhinelander,{{Cite web |last=Fisher |first=Sadie |date=2024-12-20 |title=Rhinelander-Oneida County Airport announces new seasonal flights to Chicago |url=https://www.waow.com/news/rhinelander-oneida-county-airport-announces-new-seasonal-flights-to-chicago/article_b542a41a-beda-11ef-8378-4f87c8ac0178.html |access-date=2024-12-20 |website=WAOW |language=en}} Salt Lake City,{{cn|date=May 2025}} San Antonio,{{cn|date=May 2025}} Sault Ste. Marie (MI),{{Cite web |title=United NS25 Domestic Network Changes – 22DEC24 |url=https://www.aeroroutes.com/eng/241227-uans25us |access-date=2024-12-27 |website=AeroRoutes |language=en-CA}} Spokane,{{cn|date=May 2025}} Sun Valley,{{cn|date=May 2025}} Wilmington (NC){{cite web |title=United Schedules Additional Seasonal Domestic Routes in NS24 |url=https://www.aeroroutes.com/eng/240219-uans24dom |website=Aeroroutes |access-date=February 19, 2024}} |

| Viva | Guadalajara, León/Del Bajío, Mexico City, Mexico City–AIFA (begins November 13, 2025),{{cite web |url= https://airlinegeeks.com/2025/04/15/viva-aerobus-adds-7-new-u-s-routes/ |title= Viva Aerobus Adds 7 New U.S. Routes |website=AirlineGeeks|date=April 15, 2025 |access-date=April 15, 2025}} Monterrey, Morelia | {{cite web|title=VivaAerobus Flight Schedule|url=https://www.vivaaerobus.com/en|access-date=August 16, 2019|archive-url=https://web.archive.org/web/20180405152831/https://www.vivaaerobus.com/en|archive-date=April 5, 2018|url-status=live}}

| Volaris | Guadalajara, León/Del Bajío, Mexico City, Morelia, Querétaro | {{citation needed|date=February 2025}}

| WestJet | Seasonal: Calgary, Edmonton (begins June 28, 2025){{cite web |title=WestJet July/August 2025 US Service Reductions – 04MAY25 |url=https://www.aeroroutes.com/eng/250504-ws3q25us |website=Aeroroutes |access-date=4 May 2025}} | {{cite web |title=WestJet boosts cross-border and domestic connectivity in Calgary |url= https://www.aviacionline.com/westjet-boosts-cross-border-and-domestic-connectivity-in-calgary|publisher=Aviacionline.com |date=February 14, 2023 |access-date=February 11, 2024}}

}}

{{Airport destination list | 3rdcoltitle = Refs | 3rdcolunsortable=yes

| AeroLogic | Frankfurt |

| AeroUnion | Mexico City–AIFA |

| AirBridgeCargo | Dallas/Fort Worth, Houston–Intercontinental, Luxembourg (all suspended) | {{cite web|title=Our Network|url=http://www.airbridgecargo.com/en/page/29/our-network|access-date=September 12, 2017|archive-url=https://web.archive.org/web/20170913044440/http://www.airbridgecargo.com/en/page/29/our-network|archive-date=September 13, 2017|url-status=live}}

| Air Canada Cargo | Toronto–Pearson | {{cite web|url=https://www.freightweek.org/index.php/en/latest-news/8285-air-canada-cargo-adds-freighter-service-to-chicago|title=Air Canada Cargo adds freighter service to Chicago|publisher=Freight Week|date=April 23, 2024|accessdate=April 24, 2024}}

| Air China Cargo | Anchorage, Beijing–Capital, Frankfurt, New York–JFK, Shanghai–Pudong, Tianjin |

| Air France Cargo | Dublin, Glasgow–Prestwick, New York–JFK, Paris–Charles de Gaulle |

| ANA Cargo | Tokyo–Narita | {{cite web |url=https://www.aviationwire.jp/archives/188724 |title=ANAカーゴの777F、成田－シカゴ就航 初の北米路線 |access-date=January 2, 2020 |archive-date=December 11, 2019 |archive-url=https://web.archive.org/web/20191211183602/https://www.aviationwire.jp/archives/188724 |url-status=live }}

| Asiana Cargo | Anchorage, Atlanta, New York–JFK, Seattle/Tacoma, Seoul–Incheon |

| ASL Airlines Belgium | Liège |

| Atlas Air | Amsterdam, Anchorage, Cincinnati, Dallas/Fort Worth, Frankfurt, Hong Kong, Honolulu, Los Angeles, Liège, Miami, Milan–Malpensa, New York–JFK, Seoul–Incheon, Stuttgart, Tokyo–Narita | {{cite web|title=Atlas Air Schedule|url=http://jumpseat.atlasair.com/travel/schedule.asp|website=Atlas Air|access-date=December 18, 2023|archive-date=August 13, 2023|archive-url=https://web.archive.org/web/20230813134854/http://jumpseat.atlasair.com/travel/schedule.asp|url-status=dead}}

| Cargolux | Anchorage, Atlanta, Dallas/Fort Worth, Hong Kong, Indianapolis, Kuala Lumpur–International, Los Angeles, Luxembourg, New York–JFK, Singapore, Zhengzhou |

| Cathay Cargo | Anchorage, Hong Kong, New York–JFK, Portland (OR) |

| China Airlines Cargo | Anchorage, Houston–Intercontinental, Nagoya–Centrair, San Francisco, Seattle/Tacoma, Taipei–Taoyuan |

| China Cargo Airlines | Anchorage, Atlanta, Dallas/Fort Worth, Shanghai–Pudong |

| China Southern Cargo | Guangzhou, Shanghai–Pudong | {{cite web|url=http://www.csnva.org/our-routes.html |title=China Southern Cargo Schedule |access-date=March 28, 2013 |url-status=dead |archive-url=https://web.archive.org/web/20140119045603/http://www.csnva.org/our-routes.html |archive-date=January 19, 2014}}

| DHL Aviation | Anchorage, Calgary, Cincinnati, Newark, New York–JFK |

| Emirates SkyCargo | Copenhagen, Dubai–Al Maktoum, Maastricht/Aachen, Miami | {{cite web |url=http://www.skycargo.com/english/about-us/our-network/routemap.aspx |title=SkyCargo Route Map |website=Emirates SkyCargo |access-date=May 9, 2013 |archive-url=https://web.archive.org/web/20130216065220/http://www.skycargo.com/english/about-us/our-network/routemap.aspx |archive-date=February 16, 2013 |url-status=live }}

| Etihad Cargo | Frankfurt | {{cite web|url=https://www.wfs.aero/our-services-etihad-cargo-enhances-us-cool-chain-capabilities-with-wfs-partnership/ |title=Our Services: Etihad Cargo Enhances US cool Chain Capabilities with WFS Partnership |date=October 18, 2023 |access-date=June 10, 2024 }}

| EVA Air Cargo | Anchorage, Dallas/Fort Worth, Taipei–Taoyuan |

| FedEx Express | Fort Worth/Alliance, Greensboro, Indianapolis, Los Angeles, Memphis, Milwaukee, Newark, Oakland, Omaha, Pittsburgh, Portland (OR), Seattle/Tacoma |

| Korean Air Cargo | Anchorage, Halifax, Los Angeles, San Francisco, Seattle/Tacoma, Seoul–Incheon, Toronto–Pearson |

| LATAM Cargo Chile | Campinas | {{cite web |title=City of Chicago Welcomes LATAM Cargo to O'Hare International Airport |url=https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1529 |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=February 26, 2019 |archive-url=https://web.archive.org/web/20190227060711/https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1529 |archive-date=February 27, 2019 |url-status=live }}

| LOT Polish Airlines | Warsaw–Chopin |

| Lufthansa Cargo | Anchorage, Atlanta, Frankfurt, Guadalajara, Los Angeles, Manchester (UK), Mexico City–AIFA, New York–JFK | {{cite press release |first=Łukasz |last=Malinowski |title=Cargo Jet i PLL LOT Cargo uruchomiły trasę z Pyrzowic do Chicago |trans-title=Jet Cargo and LOT Polish Airlines Cargo Has Launched a Route from Katowice to Chicago |language=pl |url=http://www.rynekinfrastruktury.pl/artykul/55/1/cargo-jet-i-pll-lot-cargo-uruchomily-trase-z-pyrzowic-do-chicago.html |publisher=Katowice International Airport |date=February 14, 2012 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20130801090027/http://www.rynekinfrastruktury.pl/artykul/55/1/cargo-jet-i-pll-lot-cargo-uruchomily-trase-z-pyrzowic-do-chicago.html |archive-date=August 1, 2013 |url-status=live }}

| Martinair | Oslo |

| MSC Air Cargo | Indianapolis, Liège | {{cite web | url=https://www.msc.com/en/solutions/air-cargo-solution/business-hub/air-cargo-schedule | title=Air cargo schedule }}

| Nippon Cargo Airlines | Anchorage, Dallas/Fort Worth, Edmonton, Los Angeles, New York–JFK | {{cite web |title=The customized AeroLogic network |url=http://www.aerologic.aero/network |website=Aero Logic |access-date=August 13, 2013 |archive-url=https://web.archive.org/web/20130808224442/http://aerologic.aero/network |archive-date=August 8, 2013 |url-status=live }}{{cite web |url=http://globalnews.ca/news/3663253/edmonton-adds-to-cargo-load-with-a-regular-flight-to-tokyo/ |title=Edmonton adds to cargo load with a regular flight to Tokyo – Edmonton |publisher=Globalnews.ca |date=August 14, 2017 |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20170819092242/http://globalnews.ca/news/3663253/edmonton-adds-to-cargo-load-with-a-regular-flight-to-tokyo/ |archive-date=August 19, 2017 |url-status=live }}

| Qantas Freight | Anchorage, Auckland, Chongqing, Honolulu, Los Angeles, Melbourne, Sydney | {{cite map |title=Qantas Freight International Network Map |publisher=Qantas Freight |url=http://www.qantas.com.au/cargo/pdf/FreightNetworkMap.pdf |format=PDF |access-date=September 1, 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150924083444/http://www.qantas.com.au/cargo/pdf/FreightNetworkMap.pdf |archive-date=September 24, 2015 }}{{cite web |url=http://info.flightmapper.net/flight/Qantas_QF_7552 |title=Qantas flight QF 7552 schedule |website=Info.flightmapper.net |date=April 27, 2016 |access-date=April 27, 2016 |archive-url=https://web.archive.org/web/20151116154030/http://info.flightmapper.net/flight/Qantas_QF_7552 |archive-date=November 16, 2015 |url-status=live }}{{cite news |title=Qantas Freight Launches Chongqing Route |url=http://aircargoworld.com/qantas-freight-launches-chongqing-route/ |work=Air Cargo World |date=April 19, 2012 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20150925094727/http://aircargoworld.com/qantas-freight-launches-chongqing-route/ |archive-date=September 25, 2015 |url-status=live }}{{cite web |title=Qantas Freighter Network Northern Summer Schedule 2010 |url=http://www.qantas.com.au/freight/pdf/QFFreighterscheduleJune2010.pdf |website=Qantas Freight |date=June 2010|access-date=July 15, 2012|archive-url=https://web.archive.org/web/20101230000848/http://www.qantas.com.au/freight/pdf/QFFreighterscheduleJune2010.pdf|archive-date=December 30, 2010}}

| Qatar Airways Cargo | Amsterdam, Brussels, Doha, Los Angeles, Milan–Malpensa, Ostend/Bruges,{{cite web|url=https://www.aviation24.be/airports/ostend-bruges/officially-added-to-qatar-airways-cargo-network/|title=Ostend-Bruges Airport officially added to Qatar Airways Cargo Network|first=Bart|last=Noëth|date=May 31, 2021|access-date=June 2, 2021|archive-date=June 2, 2021|archive-url=https://web.archive.org/web/20210602214231/https://www.aviation24.be/airports/ostend-bruges/officially-added-to-qatar-airways-cargo-network/|url-status=live}} Singapore | {{cite web|title=Qatar Airways to Begin Chicago Freighter Service |url=http://www.ameinfo.com/239240.html |work=AMEinfo |date=August 2, 2010 |access-date=November 3, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20100803064848/http://www.ameinfo.com/239240.html |archive-date=August 3, 2010}}{{cite news |title=Qatar Airways to begin Chicago freighter service |work=Air Cargo News |url=http://www.aircargonews.net/news/single-view/news/qatar-airways-to-begin-chicago-freighter-service.html |date=August 10, 2010 |access-date=September 1, 2015 |archive-url=https://web.archive.org/web/20150925050718/http://www.aircargonews.net/news/single-view/news/qatar-airways-to-begin-chicago-freighter-service.html |archive-date=September 25, 2015 |url-status=live }}{{cite news |url=http://www.joc.com/air-cargo/cargo-airlines/qatar-airways/qatar-airways-start-milan-chicago-freighter-service_20130606.html |title=Qatar Airways to Start Milan-Chicago Freighter Service |work=The Journal of Commerce |date=June 6, 2013 |access-date=June 29, 2013 |archive-url=https://web.archive.org/web/20131103200757/http://www.joc.com/air-cargo/cargo-airlines/qatar-airways/qatar-airways-start-milan-chicago-freighter-service_20130606.html |archive-date=November 3, 2013 |url-status=live }}{{cite web |title=Qatar Airways Cargo Announces Inclusion of Singapore on its Popular Transpacific Freighter Route |url=https://www.qatarairways.com/en/press-releases/2019/July/SIN777F.html |website=Qatar Airways |date=July 16, 2019 |access-date=October 3, 2020 |archive-date=December 28, 2020 |archive-url=https://web.archive.org/web/20201228055750/https://www.qatarairways.com/en/press-releases/2019/July/SIN777F.html |url-status=live }}

| Silk Way Airlines | Baku | {{cite web |title=Silk Way Launches Direct Flights to Chicago |url=http://www.aviationpros.com/news/12260892/silk-way-west-airlines-launches-direct-flights-to-chicago |access-date=October 2, 2016 |date=September 23, 2016 |url-status=dead |archive-url=https://web.archive.org/web/20161001041826/http://www.aviationpros.com/news/12260892/silk-way-west-airlines-launches-direct-flights-to-chicago |archive-date=October 1, 2016 }}

|{{nowrap|Singapore Airlines Cargo}} | Anchorage, Atlanta, Brussels, Dallas/Fort Worth, Los Angeles, Seattle/Tacoma | {{cite web |title=Singapore Airlines Cargo |url=http://www.siacargo.com/FPSearch.aspx |website=Singapore Airlines Cargo |access-date=June 10, 2013 |date=September 2015 |url-status=dead |archive-url=https://web.archive.org/web/20130517195359/http://www.siacargo.com/fpsearch.aspx |archive-date=May 17, 2013}}

| Suparna Airlines | Anchorage, Shanghai–Pudong |

| Turkish Cargo | Istanbul, Maastricht/Aachen, Shannon, Toronto–Pearson | {{cite news |title=Turkish freighter goes to Chicago |url=http://www.aircargonews.net/en/news/airlines/freighter/single-view/news/turkish-freighter-goes-to-chicago.html |work=Air Cargo News |date=April 7, 2015 |access-date=April 12, 2015 |archive-url=https://web.archive.org/web/20150701232251/http://www.aircargonews.net/en/news/airlines/freighter/single-view/news/turkish-freighter-goes-to-chicago.html |archive-date=July 1, 2015 |url-status=dead}}{{cite web |url=https://www.routesonline.com/news/38/airlineroute/276359/turkish-cargo-adds-7-destinations-in-jan-2018/ |title=Turkish Airlines Cargo added new destinations from 2018 |publisher=Routesonline.com |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20171222221644/https://www.routesonline.com/news/38/airlineroute/276359/turkish-cargo-adds-7-destinations-in-jan-2018/ |archive-date=December 22, 2017 |url-status=live }}

| UPS Airlines | Cologne/Bonn, Columbus–Rickenbacker, Dallas/Fort Worth, Louisville, Miami, Philadelphia, Portland (OR) |

}}

{{Airport-Statistics|iata=ORD}}

The following is a list of major crashes or incidents that occurred to planes at O'Hare, on approach, or just after takeoff from the airport:{{cite web |title=Chicago–O'Hare International Airport, IL profile |website=Aviation Safety Network |url=http://aviation-safety.net/database/airport/airport.php?id=ORD |date=July 13, 2008 |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20101007233524/http://aviation-safety.net/database/airport/airport.php?id=ORD |archive-date=October 7, 2010 |url-status=live }}

• On September 17, 1961, Northwest Orient Airlines Flight 706, a Lockheed L-188 Electra, crashed upon takeoff, killing all 37 on board.{{cite web|title=ASN Aircraft accident Lockheed L-188C Electra N137US Chicago–O'Hare International Airport, IL (ORD)|work=Aviation Safety Network|url=http://aviation-safety.net/database/record.php?id=19610917-3|access-date=July 15, 2012|archive-url=https://web.archive.org/web/20121023113918/http://aviation-safety.net/database/record.php?id=19610917-3|archive-date=October 23, 2012|url-status=live}}
• On August 16, 1965, United Airlines Flight 389, a Boeing 727, crashed into Lake Michigan, {{convert|30|mi|km}} east of O'Hare while on approach, killing all 30 on board.{{cite web |title=ASN Aircraft accident Boeing 727-22 N7036U Lake Michigan, MI |website=Aviation Safety Network |url=http://aviation-safety.net/database/record.php?id=19650816-0 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120425023708/http://aviation-safety.net/database/record.php?id=19650816-0 |archive-date=April 25, 2012 |url-status=live }}
• On December 27, 1968, North Central Airlines Flight 458, a Convair CV-580, crashed into a hangar at O'Hare, killing 27 on board and one on the ground.{{cite web |title=ASN Aircraft accident Convair CV-580 N2045 Chicago–O'Hare International Airport, IL (ORD) |website=Aviation Safety Network |url=http://aviation-safety.net/database/record.php?id=19681227-0 |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20130801071758/http://aviation-safety.net/database/record.php?id=19681227-0 |archive-date=August 1, 2013 |url-status=live }}
• On December 20, 1972, North Central Airlines Flight 575, a Douglas DC-9, crashed upon takeoff after colliding with Delta Airlines Flight 954, a Convair CV-880 which was taxiing across the active runway; 10 passengers on the DC-9 were killed.{{cite web |title=ASN Aircraft accident McDonnell Douglas DC-9-31 N954N Chicago–O'Hare International Airport, IL (ORD) |work=Aviation Safety Network |url=http://aviation-safety.net/database/record.php?id=19721220-1 |date=December 20, 1972 |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20130801070925/http://aviation-safety.net/database/record.php?id=19721220-1 |archive-date=August 1, 2013 |url-status=live }}
• On May 25, 1979, American Airlines Flight 191, a McDonnell Douglas DC-10 on a Memorial Day weekend flight to Los Angeles International Airport, had its left engine detach while taking off from runway 32R, then stalled and crashed into a field some {{convert|4600|ft|}} away. 273 died, including two on the ground, in the deadliest single-aircraft crash in United States history, and the worst aviation disaster in U.S. history prior to the September 11, 2001 attacks.{{cite web |title=ASN Aircraft accident McDonnell Douglas DC-10-10 N110AA Chicago – O'Hare International Airport, IL (ORD) |url=http://aviation-safety.net/database/record.php?id=19790525-2 |website=Aviation Safety Network |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20110110032908/http://aviation-safety.net/database/record.php?id=19790525-2 |archive-date=January 10, 2011 |url-status=live }}{{cite news |first=Cory |last=Franklin |title=Commentary: American Airlines Flight 191 still haunts |work=Chicago Tribune |url=http://www.chicagotribune.com/news/opinion/commentary/ct-american-airlines-ohare-crash-flight-191-hospital-perspec-0525-jm-20150522-story.html |date=May 24, 2015 |access-date=September 1, 2015 |archive-url=https://web.archive.org/web/20150909201404/http://www.chicagotribune.com/news/opinion/commentary/ct-american-airlines-ohare-crash-flight-191-hospital-perspec-0525-jm-20150522-story.html |archive-date=September 9, 2015 |url-status=live }}
• On March 19, 1982, a United States Air Force KC-135 Stratotanker crashed upon approach to O'Hare {{convert|40|mi|km}} northwest of the city (near Woodstock), killing 27 people on board.{{cite web |title=ASN Aircraft accident Boeing KC-135A-BN Stratotanker 58-0031 Greenwood, IL |url=http://aviation-safety.net/database/record.php?id=19820319-0 |work=Aviation Safety Network |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20100531163517/http://aviation-safety.net/database/record.php?id=19820319-0 |archive-date=May 31, 2010 |url-status=live }}
• On February 9, 1998, American Airlines Flight 1340, a Boeing 727, crashed upon landing from Kansas City, injuring 22 passengers.{{cite web |title=ASN Aircraft accident Boeing 727 N845AA Chicago–O'Hare International Airport, IL (ORD) |url=http://aviation-safety.net/database/record.php?id=19980209-0 |website=Aviation Safety Network |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20130801082311/http://aviation-safety.net/database/record.php?id=19980209-0 |archive-date=August 1, 2013 |url-status=live }}
• On July 23, 2006, there was a near miss involving United Airlines Flight 1015, a Boeing 737-322, and Atlas Air Flight 6972, a Boeing 747-47UF. All 131 occupants survive without injury.{{Cite web |title=Serious incident Boeing 737-322 N315UA, Sunday 23 July 2006 |url=https://asn.flightsafety.org/wikibase/370284 |access-date=2024-08-06 |website=asn.flightsafety.org}}
• On October 28, 2016, American Airlines Flight 383 aborted takeoff on runway 28R after a fire broke out in the right engine of the Boeing 767-300ER; 20 passengers and one flight attendant were injured.{{cite web|title=Uncontained Engine Failure and Subsequent Fire American Airlines Flight 383 Boeing 767-323, N345AN|url=https://ntsb.gov/investigations/AccidentReports/Reports/AAR1801.pdf|website=ntsb.gov|publisher=National Transportation Safety Board|access-date=April 4, 2018|archive-url=https://web.archive.org/web/20180405024843/https://ntsb.gov/investigations/AccidentReports/Reports/AAR1801.pdf|archive-date=April 5, 2018|url-status=live}}
• On June 13, 2022, a particularly intense supercell coincided with the landing of American Airlines Flight 151 from Paris Charles de Gaulle, which caused extreme turbulence where ground ASOS reported a record-tying wind gust of {{cvt|84|mph|km/h}}. One passenger was physically removed from their seat as a result, suffering severe injuries. The passenger was not wearing a seatbelt at the time of the incident. A lawsuit against the airline was filed in 2024.{{cite web |url=https://cookcountyrecord.com/stories/660937914-airline-faces-lawsuit-over-severe-turbulence-injuries |title=Airline Faces Lawsuit Over Severe Turbulence Injuries |work=Cook County Record |date=22 June 2024 |access-date=11 April 2025 |location=Cook County, Illinois }}
• On May 18, 2025, a DoorDash delivery driver drove onto the runway and tarmac of the airport. He was spotted by ATC. {{Cite web|url=https://www.cbsnews.com/chicago/news/delivery-driver-secured-areas-ohare/|title=Delivery driver finds way onto secured areas at O'Hare, drives miles before being spotted - CBS Chicago|first=Sara|last=Machi|date=May 18, 2025|website=www.cbsnews.com}}

• List of airports with triple takeoff/landing capability
• List of airports in Illinois
• List of the world's busiest airports, for a complete list of the busiest airports in the world
• Transportation in Chicago

{{reflist}}

• {{Air Force Historical Research Agency}}

{{Sister project links|O'Hare International Airport|voy=O'Hare International Airport}}

{{div col}}

• {{Official website|https://www.flychicago.com/ohare/}}
• [https://ord21.com/home/Pages/default.aspx O'Hare Modernization Program], City of Chicago
• [https://chicago.legistar.com/LegislationDetail.aspx?ID=3357763&GUID=936BA777-935A-43D1-BCD7-DE1164AF51AC&Options=&Search= Council Ordinance authorizing ORD21] (with TAP attached, O2018-1124 (V1).pdf), City of Chicago
• [https://web.archive.org/web/20110727133851/http://nwchicagohistory.org/nwch_ohare.html O'Hare History], Northwest Chicago Historical Society
• The Fascinating History of Chicago's O'Hare International Airport: [https://web.archive.org/web/20151017161106/http://airwaysnews.com/blog/2014/04/07/chicago-ohare-history/ 1920–1960], [https://web.archive.org/web/20151017161106/http://airwaysnews.com/blog/2014/04/14/the-fascinating-history-chicagos-ohare-international-airport-1960-2000/ 1960–2000], [https://web.archive.org/web/20151017161105/http://airwaysnews.com/blog/2014/04/21/the-fascinating-history-chicagos-ohare-international-airport-2000-to-present/ 2000 to Present]
• {{cite web|last=Olson|first=William|title=Sustainable Airport Design Takes Flight: The O'Hare Modernization Program|url=http://www.greenbeanchicago.com/index.php/sustainable-airport-design-takes-flight-ohare-modernization-program/|work=GreenBeanChicago.com|date=January 4, 2010|access-date=November 12, 2013|archive-date=November 12, 2013|archive-url=https://web.archive.org/web/20131112013549/http://www.greenbeanchicago.com/index.php/sustainable-airport-design-takes-flight-ohare-modernization-program/|url-status=dead}}
• {{FAA-diagram|00166}}

{{US-airport|ORD}}

• [https://radar.airport-frequencies.com/ Live KORD airplane map radar]
• {{cite report |url=https://www.justice.gov/sites/default/files/atr/legacy/2006/04/27/209455.pdf |title=Comments on Congestion And Delay Reduction at Chicago O'Hare International Airport |docket=FAA-2005-20704 |publisher=United States Deaprtment of Justice Antitrust Division |date=May 24, 2005 |last1=Pate |first1=R. Hewitt |last2=McDonald |first2=Bruce |last3=Gillespie |first3=William H. |access-date=September 2, 2011}}
• [https://www.bigorre.org/aero/meteo/KORD/en O'Hare International Airport aviation weather] {{in lang|es|en|fr|zh}}

{{div col end}}

{{O'Hare International Airport|state=expanded}}

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{{Major US Airports}}

{{Greater Chicago Airports}}

{{Aviation in Illinois}}

{{Authority control}}

{{DEFAULTSORT:O'hare International Airport}}

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