Singapore Airlines Flights 23 and 24

{{Short description|The longest regularly scheduled nonstop flight(s) in the world}}

{{Infobox aircraft flight

| operator = Singapore Airlines

| name = Singapore Airlines Flight 23

| takeoff_site = SQ23: New York–JFK
SQ24: Singapore Changi

| landing_site = SQ23: Singapore Changi
SQ24: New York–JFK

| distance_travelled = 16,500 km (SQ23)
17,250 km (SQ24)

| aircraft = Airbus A350-900ULR

}}

Singapore Airlines Flights 23 and 24 (SQ23/SIA23 and SQ24/SIA24, respectively) are the longest regularly scheduled non-stop flights in the world, operated by Singapore Airlines between Singapore Changi Airport and New York–JFK.{{Cite web|last=Pallini|first=Thomas|title=Inside the new world's longest flight: What it's like to fly on Singapore Airlines' new route between Singapore and New York|url=https://www.businessinsider.com/inside-the-new-worlds-longest-flight-singapore-airlines-a350-tour-2020-11|access-date=2021-01-01|website=Business Insider|archive-date=November 25, 2021|archive-url=https://web.archive.org/web/20211125002148/https://www.businessinsider.com/inside-the-new-worlds-longest-flight-singapore-airlines-a350-tour-2020-11|url-status=live}} The route launched on 9 November 2020.{{cite news |title=World's longest flight to launch between Singapore and New York |url=https://www.independent.co.uk/travel/news-and-advice/worlds-longest-flight-singapore-airlines-new-york-b1181596.html |access-date=26 February 2023 |work=The Independent |date=20 October 2020 |language=en}}

The route has a great circle distance of {{convert|15349|km|mi nmi|0|abbr=}}.{{Cite web|last=|first=|date=|title=Great Circle Map Distance SIN-JFK|url=http://www.gcmap.com/mapui?P=sin–JFK|url-status=live|archive-url=https://web.archive.org/web/20211008043742/http://www.gcmap.com/mapui?P=SIN–JFK|archive-date=October 8, 2021|access-date=2021-01-01|website=www.gcmap.com}} However, SQ24 to New York is typically flown a ground distance of around {{cvt|17,250|km|mi nmi}}{{Cite web|title=SQ24 (SIA24) Singapore Airlines Flight Tracking and History 25-May-2021 (SIN / WSSS-KJFK)|url=https://flightaware.com/live/flight/SIA24/history/20210524/1715Z/WSSS/KJFK|url-status=live|access-date=2021-05-30|website=FlightAware|language=en|archive-date=June 2, 2021|archive-url=https://web.archive.org/web/20210602212915/https://flightaware.com/live/flight/SIA24/history/20210524/1715Z/WSSS/KJFK}} over the Pacific Ocean where jet stream winds can assist; while SQ23 back to Singapore sometimes opts, instead of the westward polar route, to fly a ground distance of {{cvt|16,500|km|mi nmi}}{{Cite web|title=SQ23 (SIA23) Singapore Airlines Flight Tracking and History 15-Jan-2021 (KJFK-SIN / WSSS)|url=http://flightaware.com/live/flight/SIA23/history/20210116/0330Z/KJFK/WSSS|access-date=2021-01-18|website=FlightAware|language=en|archive-date=January 28, 2021|archive-url=https://web.archive.org/web/20210128122309/https://flightaware.com/live/flight/SIA23/history/20210116/0330Z/KJFK/WSSS|url-status=live}} eastward, across the Atlantic Ocean, when favorable jet stream winds assist to save both flying time and fuel. The flights are scheduled to take over 19 hours and 18 hours respectively.

The flights originally used an Airbus A350-900.{{Cite web|title=Singapore Airlines To Begin Non-Stop Services To New York's JFK International Airport|url=https://www.singaporeair.com/en_UK/sg/media-centre/press-release/article/?q=en_UK/2020/October-December/ne1720-201020|access-date=2021-01-01|website=www.singaporeair.com|language=en|archive-date=November 2, 2021|archive-url=https://web.archive.org/web/20211102171308/https://www.singaporeair.com/en_UK/sg/media-centre/press-release/article/?q=en_UK%2F2020%2FOctober-December%2Fne1720-201020|url-status=live}} On January 16, 2021, the route was changed to operate using an Airbus A350-900ULR.{{Cite web|title=Singapore Airlines Expands U.S. Flight Schedule|url=https://www.travelagentcentral.com/transportation/singapore-airlines-expands-u-s-flight-schedule|access-date=2021-07-08|website=Travel Agent Central|date=December 18, 2020 |language=en|archive-date=August 3, 2021|archive-url=https://web.archive.org/web/20210803121256/https://www.travelagentcentral.com/transportation/singapore-airlines-expands-u-s-flight-schedule|url-status=live}}{{Cite web|title=January 2021 SQ23 Flights from New York to Singapore|url=https://www.flightera.net/en/flight/Singapore+Airlines-New+York-Singapore/SQ23/Jan-2021#flight_list|access-date=2022-01-20|website=Flightera.net|language=en|archive-date=January 20, 2022|archive-url=https://web.archive.org/web/20220120103423/https://www.flightera.net/en/flight/Singapore+Airlines-New+York-Singapore/SQ23/Jan-2021#flight_list|url-status=live}}