The Seattle--Tacoma International Airport (IATA: SEA, ICAO: KSEA, FAA LID: SEA), also known as Sea--Tac Airport or Sea--Tac, is an American airport. It is located in SeaTac, Washington, at the intersections of State Routes 99, 509, and 518, about 1.5 miles (2.4 kilometres) west of Interstate 5. It serves the cities of Seattle and Tacoma, as well as the rest of Western Washington.
The airport has service to destinations throughout North America, Europe, the Middle East, and East Asia. It is the primary hub for Alaska Airlines, whose headquarters is located near the airport, as well as its regional subsidiary Horizon Air.
In 2013, the airport served over 34.7 million passengers, making it the 15th-busiest airport in the United States. It ranks 23rd in total aircraft operations and 21st in total cargo volume. The airport is the largest generator of vehicle trips in the state, and its 13,000-car parking garage is the world's largest parking structure under one roof.
The top five carriers at the airport in number of passengers carried in 2012 were Alaska Airlines (35.06%), Horizon Air (14.1%), Delta Air Lines (11.6%), Southwest Airlines (8.5%), and United Airlines (5.7%).
