Which is the World’s Busiest Overseas Route?

OAG Aviation Worldwide Ltd. published a report in which it says that the planes have made 30,537 trips in between Singapore and Kuala Lumpur in 12 months. The flight takes about a one-hour flight to link the smallest countries on the planet with its next-door neighbour and its one of the world's busiest international route. The world's busiest air route is barred none which is between Seol and island of South Korea.