carrier, Asiana Airlines, was established in 1988 and originally served Seoul, Jeju and Busan domestically and Bangkok, Singapore, Japan and Los Angeles internationally. By 2006, Asiana served 12 domestic cities, 66 cities in 20 foreign countries for commercial traffic and 24 cities in 17 countries for cargo traffic. Combined, South Korean airlines currently serve 297 international routes. Smaller airliners, such as Air Busan, Jin Air, Eastar Jet and Jeju Air, provide domestic service and Japan/Southeast Asian route with lower fares. South Korea contains the busiest passenger air corridor as measured by passengers per year. Over ten million people traveled between Seoul Gimpo Airport and Jeju in 2015 alone. As competition is fierce and prices affordable, the trend has been increasingly towards more air travel on this route. Similarly, air travel is also growing between Jeju and other mainland airports. There is discussion about a Jeju Undersea Tunnel which would make many of these domestic flights redundant. Along other routes, air travel competes with the KTX high speed rail service and has declined in the 2000s and 2010s. Airports Construction of South Korea's largest airport, Incheon International Airport, was completed in 2001, in time for the 2002 FIFA World Cup. By 2007, the airport was serving 30 million passengers a year. The airport has been selected as the "Best Airport Worldwide" for four consecutive years since 2005 by Airports Council International. Seoul is also served by Gimpo International Airport (formerly Kimpo International Airport). International routes mainly serve Incheon, while domestic services mainly use Gimpo. Other major airports are in Busan and Jeju. There are 103 airports in South Korea (1999 est.) and these may be classified as follows. Airports with paved runways: total: 67 over 3,047 m: 1 2,438 to 3,047 m: 18 1,524 to 2,437 m: 15 914 to 1,523 m: 13 under 914 m: 20 (1999 est.) Airports with unpaved runways: total: 36 over 3,047 m: 1 914 to 1,523 m: 3 under 914 m: 32 (1999 est.) Heliports: 203 (1999 est.) Pipelines South–North Pipeline Korea Trans Korea Pipeline These pipelines are for petroleum products. Additionally, there is a parallel petroleum, oils and lubricants (POL) pipeline being completed See also Transportation in North Korea The Korea Transport Institute Plug-in electric vehicles in South Korea References External links Korea Expressway Corporation Freeway system map Korean Air Asiana Airlines Incheon International Airport Gimpo International Airport