World's Busiest Routes

Of the 10 routes over 35,000 kilometers that had the most direct flights between March 2018 and February 2019, eight originated in the U.S., according to OAG's Busiest Routes 2019 report. The busiest crossborder routes of any distance were Kuala Lumpur-Singapore Changi with over 30,187 flights and Hong Kong-Taipei with 28,447. Fifteen of the 20 busiest crossborder routes originate and end in the Asia/Pacific region. OAG excluded carriers that operate fewer than 500 scheduled flights per year.