If you were to rank the busiest air routes in the world, where would the route between Seoul and the South Korean island of Jeju land on your list? If it wouldn’t make your list at all, we’re certainly not judging. On air-travel intelligence company OAG’s list, however, Jeju to Seoul ranks number one. According to Google Flights, approximately 120 flights run in either direction between the two destinations every day. Let’s explore why millions make the trip every year.

— Read on curiosity.com/topics/the-worlds-busiest-air-route-goes-to-an-island-youve-probably-never-heard-of-curiosity