As international air journey settled into a brand new rhythm in 2025, OAG’s newest Busiest Flight Routes in the World report presents a transparent image of the place travellers have been flying the most throughout the yr. Based on scheduled seat capability, the rankings spotlight the air corridors that carried the highest volumes of passengers worldwide, and they’re overwhelmingly concentrated in one area.
Nine of the world’s prime ten busiest routes function inside the Asia-Pacific, underlining the area’s dense metropolis pairings, high-frequency flights and sustained demand for short-haul journey. Leading the checklist is Jeju (CJU)–Seoul Gimpo (GMP), which retains its long-held crown as the world’s busiest airline route, clocking 14.4 million scheduled seats in 2025 alone. Japan claims each the second and third spots, reflecting the nation’s deeply entrenched tradition of home air journey and the scale at which its main cities stay related all through the yr. India additionally makes a robust displaying. The Mumbai–Delhi hall ranks as the eighth-busiest home route globally, with 7,642,016 scheduled seats in 2025, an emphatic marker of how indispensable this air bridge continues to be for enterprise, leisure and on a regular basis motion between the two metros.
How was this checklist compiled?
OAG compiles these annual rankings by analysing scheduled seat capability throughout the calendar yr, counting flights in each instructions to find out the most closely travelled airline routes worldwide.