The world’s busiest air route isn’t London to Paris or New York to Los Angeles, but the trip between Seoul and a tiny island off the coast of South Korea. Planes made 65,000 trips between the Korean capital and Jeju island -- a journey of little more than an hour -- in 2017, equivalent to 178 flights a day, according to data from OAG Aviation Worldwide Ltd. That’s almost double the 35,000 trips on the busiest North American route: Los Angeles to San Francisco. Asian cities dominated the list, cementing the region’s status as the world’s fastest-growing travel market. Among the 10 busiest routes in the world last year, Los Angeles-San Francisco was the only North American entry and there wasn’t a single European destination. The top European route in OAG’s rankings was Dublin-London Heathrow with about 14,500 flights.