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 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 East Asia.