Transportation in Seoul 2005 AETRA passenger survey, jointly administered by the IATA and Airports Council International, voted it the best airport in the world. It was named by Skytrax as the world's 5th best airport for 2006. Incheon and Gimpo are linked to Seoul by highways, and Gimpo is also linked by subway (line #5). The Incheon International Airport Railroad airport express (or AREX, and styled as A'REX) station is located in the Transport Centre adjacent to the main terminal building and provides high-speed services to Gimpo Airport and Seoul station. There are four types of buses: Seoul has many big intercity/express bus
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