Gimpo International Airport an extension to Seoul Station which opened in December 2010. Seoul Subway Line 9 also links the airport to the Gangnam area. For many years, the airport was served by the Gimpo Line, a railway line that no longer exists. In the 1990s, Seoul Subway Line 5 was extended to Gimpo. Gimpo International Airport Gimpo International Airport ( ), commonly known as Gimpo Airport (formerly Kimpo International Airport), is located in the far western end of Seoul, some west of the Central District of Seoul. Gimpo was the main international airport for Seoul and South Korea before being replaced by
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