Most flights into Seoul get there in the larger sized Incheon Airport which is found about 60km clear of downtown Seoul, but some arrive into Gimpo Airport which is located nearer to the city (around 20km away). Both the bus network and Subway / Metro community in Seoul is efficient https://whatiskoreankaraokestyle11110.blogofoto.com/68901329/5-easy-facts-about-seoul-gangnam-퍼펙트가라오케-nightlife-place-described