In 2025, Singapore Airlines operates the world’s longest commercial flight from New York JFK to Singapore Changi at 15,332 km, followed by its Newark to Singapore service at 15,329 km.
Both routes use the Airbus A350-900 and have been operated by Singapore Airlines for several years, showing how a single carrier and a single aircraft type can define the limits of commercial aviation.

https://aviationa2z.com/index.php/2026/05/24/10-longest-flights-in-the-world-2026/#