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Seattle–Tacoma International Airport

Seattle metropolitan area, Puget Sound region

  • IATASEA
  • ICAOKSEA
  • FAASEA
52.7 million Passengers a year (2025)
Serves
Seattle metropolitan area, Puget Sound region
Operator
Port of Seattle
Owner
Not recorded
Opened
31 October 1944
Elevation
433 ft (132 m)
Runways
3 (longest 3,627 m)
Airlines based here
Alaska Airlines, Delta Air Lines

About the airport

Seattle–Tacoma International Airport (IATA: SEA, ICAO: KSEA, FAA LID: SEA) is the primary international airport serving Seattle and its surrounding metropolitan area in the U.S. state of Washington. It is in the city of SeaTac, which was named after the airport's nickname Sea–Tac, approximately 14 miles (23 km) south of downtown Seattle and 18 miles (29 km) north-northeast of downtown Tacoma. The airport is the busiest in the Pacific Northwest region of North America and is owned by the Port of Seattle. The entire airport covers an area of 2,500 acres (1,000 hectares) and has three parallel runways. It is the primary hub for Alaska Airlines, whose headquarters are near the airport. The airport is also a hub and international gateway for Delta Air Lines, which has expanded at the airport since 2011. As of 2026, 37 airlines operate at Sea–Tac, serving 96 domestic and 37 international destinations in North America, Oceania, Europe, the Middle East, and Asia. Sea–Tac was developed in the 1940s to replace Boeing Field, which had been converted to military use during World War II. A site near Bow Lake was chosen in 1942 and construction…

This summary is adapted from Wikipedia and is available under the Creative Commons Attribution-ShareAlike Licence. Passenger and runway figures come from the same source and can lag the latest annual totals, so check the figures the operator publishes for the current total.