Seattle's Line 1 serves the airport at the SeaTac/Airport Station with frequent service to downtown Seattle and the University of Washington.
The station opened on December 19, 2009, and is connected to the airport terminal via a pedestrian bridge to the airport parking garage.
Another pedestrian bridge over International Boulevard is used to access the city of SeaTac, nearby airport hotels, and King County Metro buses including RapidRide A Line.
A 1.6-mile extension of the Link line south to Angle Lake Station at South 200th Street opened on September 24, 2016.

The airport is also served both by the King County Metro bus system and Sound Transit regional express buses.

Tukwila Station, which is approximately 5 miles east of the airport, is served by Sounder commuter rail and Amtrak Cascades regional inter-city rail with service north to Vancouver, Canada, and service south to Portland and Eugene in Oregon.
This station can be reached in about 30 minutes via the Central Link light rail or the RapidRide A Line bus service and transferring at Tukwila International Boulevard station to the RapidRide F Line bus service.

The airport is served by door-to-door shuttle services (Shuttle Express and Speedi Shuttle) and several scheduled airporter bus services.
Airporters include Bellair Charters to Yakima and Bellingham, and the Quick Shuttle to downtown Vancouver, Canada, through Quick Shuttle, with other pick-up stops at downtown Seattle, Bellingham International Airport, and drop-off stops just inside the Canadian–U.S. boundary and at the Vancouver International Airport.

Taxis, limousines, and transportation network companies (Lyft, Uber and Wingz) are also available.
Seattle's Line 1 serves the airport at the SeaTac/Airport Station with frequent service to downtown Seattle and the University of Washington. The station opened on December 19, 2009, and is connected to the airport terminal via a pedestrian bridge to the airport parking garage. Another pedestrian bridge over International Boulevard is used to access the city of SeaTac, nearby airport hotels, and King County Metro buses including RapidRide A Line. A 1.6-mile extension of the Link line south to Angle Lake Station at South 200th Street opened on September 24, 2016.
The airport is also served both by the King County Metro bus system and Sound Transit regional express buses.
Tukwila Station, which is approximately 5 miles east of the airport, is served by Sounder commuter rail and Amtrak Cascades regional inter-city rail with service north to Vancouver, Canada, and service south to Portland and Eugene in Oregon. This station can be reached in about 30 minutes via the Central Link light rail or the RapidRide A Line bus service and transferring at Tukwila International Boulevard station to the RapidRide F Line bus service.
The airport is served by door-to-door shuttle services (Shuttle Express and Speedi Shuttle) and several scheduled airporter bus services. Airporters include Bellair Charters to Yakima and Bellingham, and the Quick Shuttle to downtown Vancouver, Canada, through Quick Shuttle, with other pick-up stops at downtown Seattle, Bellingham International Airport, and drop-off stops just inside the Canadian–U.S. boundary and at the Vancouver International Airport.
Taxis, limousines, and transportation network companies (Lyft, Uber and Wingz) are also available.
Seattle–Tacoma International Airport