From K-Pop to K-Airlines: Three Charts on South Korea's Aviation Success | Aviation Market Analysis | OAG

South Korea’s aviation sector continues to exceed its relative scale, and nowhere is this more striking than on the world’s busiest airline route. Jeju International (CJU) – Seoul Gimpo (GMP) tops OAG’s global rankings for the busiest domestic route in December 2025, with 1.46 million seats, and grew at the fastest rate among the Top 10 busiest domestic routes. Using three airline capacity data points from November 2025, this blog explores the dynamics shaping South Korea's air travel landscape