In 2025, the world’s busiest air routes aren’t between Europe and the US. They’re overwhelmingly in Asia-Pacific, driven by short domestic flights that run at a near-constant pace. OAG’s latest ranking shows just how much these corridors work like shuttles, and what that says about the way people travel today.
Seoul never feels finished, and that is exactly why it stays compelling. The city keeps adding layers, mixing everyday routines and bold buildings, without ever trying to make the whole picture perfectly coherent.
Seoul runs on two airports that do not serve the same purpose, and knowing how they work can genuinely simplify your trip. This guide breaks everything down so you can move between the city and your terminal without stress.