South Korea’s Jeju (CJU)-Seoul Gimpo (GMP) is the World’s Busiest Airline Route in 2025, Latest OAG Data Reveals

23/12/2025 10:57 AM

LONDON, Dec 23 (Bernama) -- OAG, the leading data platform for the global travel industry, today revealed its ranking of 2025’s Busiest Airline Routes. The analysis is powered by OAG's Global Airline Schedules Data and provides an overview of global route performance and trends.

Jeju to Seoul Gimpo is the busiest airline route of 2025 with 14.4 million seats scheduled, a modest 1% increase versus 2024. There is room yet for growth on this route, which is still 17% short of regaining its capacity level of 2019. Seven carriers operate on this intensely competitive route.

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