Sudogwon
Incheon International Airport (IIA; ) (sometimes referred to as Seoul–Incheon International Airport) is the largest airport in South Korea. It is the primary airport serving the Seoul Capital Area and one of the largest and busiest airports in the region. As of 2020, it has been rated as the world's fourth best and one of the cleanest airports by Skytrax along with Singapore Changi Airport and Tokyo Haneda Airport.