The Seattle–Tacoma International Airport: 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 west of Interstate 5. It serves the cities of Seattle and Tacoma, as well as the rest of western Washington state.
The airport has service to destinations throughout North America, Europe, the Middle East and East Asia. The airport is the primary hub for Alaska Airlines, whose headquarters is located near the airport, and its regional subsidiary Horizon Air.
In 2011, the airport served over 32.8 million passengers, making it the 16th-busiest airport in the United States. It ranks 23rd in total aircraft operations and 21st in total cargo volume.
The top-five carriers at the airport in number of passengers carried in 2011 were Alaska Airlines (35.7%), Horizon Air (14.1%), Delta Air Lines (11.6%), United Airlines (11.3%) and Southwest Airlines(8.9%).