Singapore Airlines Flights 21 and 22

Singapore Airlines Flights 21 and 22 (SQ21/SIA21 and SQ22/SIA22, respectively) are airline routes operated by Singapore Airlines between Singapore Changi Airport (SIN) and Newark Liberty International Airport (EWR). They were the two longest regularly scheduled non-stop flights in the world, until surpassed by Singapore Airlines Flights 23 and 24 (SQ23 and SQ24) between Singapore Changi Airport and John F. Kennedy International Airport (JFK) in November 2020.

The flights were operated from 28 June 2004 to 23 November 2013, using an Airbus A340-500, and again from 11 October 2018 using an Airbus A350-900ULR until operations were suspended on 25 March 2020 due to the COVID-19 pandemic. Two years and two days later, it resumed the service using the same aircraft type.

The flights cover 15,300 to 17,000 kilometres (9,500 to 10,600 mi; 8,300 to 9,200 nmi) for SQ21 and 17,205 kilometres (10,691 mi; 9,290 nmi) for SQ22. For SQ21, flights flew over the Atlantic Ocean, Europe and Asia but often some flights flew in the opposite direction of SQ22's path. For SQ22, flights flew over the Pacific Ocean, Asia and United States.