Sapporo New Chitose to Tokyo Haneda was the world's busiest domestic route in July, offering 1.1 million scheduled seats and recording 8% year-on-year growth.
The route linking Seoul and Jeju Island, the world's busiest domestic air corridor in 2025, slipped to second place by offering 1.07 million scheduled seats, falling 9% compared with the previous period.
A general view of the Seongsan Ichulbong (Sunrise Peak) volcanic rock formation on Jeju island, South Korea. Photo by AFP
The flight between Seoul and Jeju takes around one hour and 15 minutes and is popular with travelers combining a visit to the South Korean capital with a trip to Jeju Island.
Often dubbed the "Hawaii of South Korea," the island is famed for its volcanic scenery, UNESCO-listed natural attractions, and distinctive cultural heritage, including the haenyeo — female free divers who have harvested seafood for generations.
