Jeju City Jeju City Jeju ("Jeju-si"; ) is the capital of Jeju Province in South Korea and the largest city on Jeju Island. The city is served by Jeju International Airport (IATA code CJU). Located on an island off the Korean Peninsula, Jeju has mild, warm weather during much of the year. The city is a well-known resort, with prestigious hotels and public casino facilities. In 2011, 9.9 million passengers flew between the two cities of Seoul and Jeju, making the Gimpo–Jeju route the world's busiest passenger air route. Jeju welcomes over ten million visitors from mainland Korea, Japan, and China every
Incheon International Airport 19th in the world and eighth in Asia by passenger traffic. In 2016, the airport served a total of 57,849,814 passengers. The airport opened for business in early 2001 to replace the older Gimpo International Airport, which now serves mostly domestic destinations plus shuttle flights to alternate airports in China, Japan, and Taiwan. The airport was originally planned to be built in three phases, incrementally increasing airport capacity as the demand grew. This was changed, however, to four phases after the airport was opened. In Phase 1, the airport had a capacity of 30 million passengers annually, and a cargo