The World's Busiest Flights by Region ✈️

What We're Showing

This graphic shows the busiest domestic flights by region in 2025, based on data from OAG.

Key Takeaways

• South Korea hosts the world’s busiest domestic flight route, with 14.4 million scheduled seats between Jeju and Seoul Gimpo in 2025.
• In North America, Vancouver–Toronto ranks as the busiest route in 2025 with 3.7 million seats, just ahead of Los Angeles–New York JFK.