At the moment, the world's longest nonstop flight is the route between New York and Singapore. With a calculated distance of 15,349km and almost 19 hours of flying, the route operated by Singapore Airlines is the longest in the world.

As of 2026, Singapore Airlines holds the record for the world's longest commercial flight by time and distance. The route from New York (JFK) to Singapore (SIN) clocks in at an average "block time" of 18 hours and 50 minutes, covering approximately 9,537 miles. The return flight can sometimes exceed 19 hours depending on the jet stream. This ultra-long-haul journey is operated using a specially configured Airbus A350-900ULR (Ultra Long Range), which notably lacks a standard Economy class, featuring only Premium Economy and Business Class to reduce weight and maximize passenger comfort. However, Qantas is currently challenging this record in late 2026 with "Project Sunrise," which will launch non-stop flights from Sydney to London and New York, expected to take between 20 and 22 hours. These flights represent the ultimate frontier of aviation technology, utilizing advanced air filtration and circadian-rhythm lighting to help passengers survive nearly an entire day in a single pressurized tube.