Which is the world's busiest international route?
Averaging 84 trips a day, a one-hour flight between Singapore and Malaysian capital Kuala Lumpur is the world's busiest international route, according to OAG Aviation Worldwide. In the top-20 list, New York-Toronto was the busiest route outside Asia. The world's busiest domestic route remains between a South Korean island and capital Seoul where planes made nearly 65,000 trips in 2017.