Seattle-Tacoma International Airport (IATA: SEA, ICAO: KSEA, FAA LID: SEA), also known as Sea-Tac Airport, is located
between Seattle and Tacoma, Washington, United States.
In 2013, the airport served over 34.7 million passengers. The top airlines at the airport in number of passengers carried in 2013 were
Alaska Airlines (51.5%), Delta Air Lines (12.2%), United Airlines (9.9%), and Southwest Airlines (8.6%).
Sea-Tac is at the intersections of State Route 518, State Route 99 and State Route 509.
It is located about 1.5 miles (2.4 km) from Interstate 5. It serves Seattle, Washington and Tacoma, Washington as well as western
Washington state. The airport is a hub for Alaska Airlines, whose headquarters is located near the airport, and its
regional subsidiary Horizon Air. The airport has service to several destinations throughout North America, Europe and
The airport has a Central Terminal building with four concourses (A–D) and two Satellite Terminals (North and South).
The satellite terminals are connected to the central terminal by an underground people mover system.. There are three main
checkpoints at Sea-Tac and a fourth that is opened as needed during peak periods.