In this article, we’ve compiled a list of the top 10 busiest routes by number of seat capacity in 2023. All of the top 10 routes were domestic, and most were in Asia.  1. Jeju International (CJU) – Seoul Gimpo (GMP), South Korea Seat Capacity in 2023: 13,728,786 seats Change vs 2022: -12% (Ranking: 1) Change vs 2019: -21% (Ranking: 1) Major Airlines: Korean Air, Asiana Airlines, JejuAir, Air Busan, T’way Air Maintaining its stronghold as the busiest route, the … Continue reading World’s Top 10 Busiest Routes of 2023