Incheon International Airport (IIA) (IATA: ICN, ICAO: RKSI) (sometimes referred to as Seoul–Incheon International Airport) is the largest airport in South Korea, the primary airport serving the Seoul Capital Area, and one of the largest and busiest airports in the world. As of 2021, the airport has been rated by Skytrax as the fourth best airport in the world. Skytrax also has rated the airport as the world’s best international transit airport and one of the world’s cleanest airports. The airport is one of Skytrax’s 5-star airports and also has been awarded for the best airport security in 2021. The airport opened for business on 29 March 2001 to replace the older Gimpo International Airport, which now serves mostly domestic destinations and shuttle flights to several East Asian metropolitan areas including Tokyo, Osaka, Beijing, Shanghai, and Taipei. Incheon International Airport is located west of Incheon’s city center, on an artificially created piece of land between Yeongjong and Yongyu Islands. The two islands were originally separated by shallow sea. That area between the two islands was reclaimed for the construction project, effectively connecting the once separate Yeongjong and Yongyu islands. The reclaimed area as well as the two islands are all part of Jung-gu, an administrative district of Incheon. The airport holds a record of being ranked the Best Airport Worldwide for 11 consecutive years by the Airports Council International (ACI)’s Airport Service Quality Award from 2005 to 2016, and has also been rated the world’s best among airports of its size (25–40 million passengers) and region (Asia-Pacific) since 2012 due to the institution’s decision to discontinue the Best Airport Worldwide category. Incheon International Airport’s terminal has 111 boarding gates altogether, with 44 in Terminal 1, 30 in Concourse A (connected to terminal 1), and 37 in Terminal 2. The airport was constructed to share the demand for air transport in the 21st century and to serve as a hub airport in Northeast Asia. (Source: https://en.wikipedia.org/wiki/Incheon_International_Airport) Incheon has 4 active runways. Two parallel paved asphalt runways, 15L/33R and 15R/33L, each 3,750m-long, 60m-wide (12304 x 197 ft) runs east-side of the airfield, while the the 3rd runway, 16L/34R 4000m x 60m (13,123ft x 197ft) and the new 4th runway 16R/34L (opened June 2021) 3,750m x 60m (12304ft x 197ft) runs west-side of the airfield. All 4 runways are capable of servicing Airbus A380s/Boeing B747s and are CAT IIIa certified.