There are many airports in the country that connect Seoul to major provincial cities, and some provincial cities between them. It’s an inexpensive and convenient way to travel to Korea, quite safe and fast. You can (and even depending on the periods and destinations, you have to) book by phone (the operators speak English), and, in most cases, you can collect your ticket at the last moment, at the airport or in one of the agencies. neighborhood trip. At the airport, the system is very well done, very fast too, because you can collect your ticket and check in at the same time at one of the many counters in the terminal. All this at the last minute if you don't have any luggage. Seoul's domestic airport is at Gimpo (where you can also find flights to China, Japan and Taiwan), the international airport is on an island off Incheon (see Seoul). There are two other international airports, in Busan (Gimhae) and Jeju, but the latter is mostly served by domestic flights. The Seoul-Jeju line is the busiest in the world!