Longest Flights In The World 2025. They are ordered according to distance, since this metric remains constant, as opposed to flight. With qantas set to take the top spot with a mammoth nonstop route linking london heathrow and sydney come 2025, here is a list of the world’s current top 10 longest flights by distance in.

These flights, which can take as long as 19 hours, connect some of the world’s biggest cities. Qantas airways is set to launch the world’s longest commercial flight by late 2025, connecting london with sydney.