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, Qantas holds the title for the longest commercial flight with its "Project Sunrise" routes. These non-stop flights connect Sydney to London and Sydney to New York, covering distances of approximately 10,500 miles and lasting between 19 and 22 hours. These flights utilize specially modified Airbus A350-1000ULR (Ultra Long Range) aircraft, which feature enhanced cabin comfort to help passengers endure the nearly day-long journey. Previously, Singapore Airlines held the record with its Singapore to Newark route (about 18-19 hours). Qantas's initiative has fundamentally changed ultra-long-haul travel, allowing passengers to skip layovers in hubs like Dubai or Singapore entirely.