Top 20 international airline routes of the world

The busiest airline routes in the world have been revealed, and 15 of them are in the Asia Pacific.

Kuala Lumpur (KUL) to Singapore (SIN) took the title of the busiest airline route in the world, according to a new ranking from British global travel data provider OAG. This route has more than 30,000 flights every year. Other busy routes include Hong Kong (HKG) to Shanghai (PVG) and New York (JFK) to Toronto (YYZ), which was the busiest route in North America on last year's list, too.

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