Seattle-Tacoma International Airport
Also known as: Sea-Tac Airport, Seattle Airport, SEA Airport, SeaTac.
Private transfer from SEASee pricesSee pricesAbout Seattle-Tacoma International Airport
Seattle-Tacoma International Airport (SEA), known as Sea-Tac, serves Seattle, Tacoma and the Puget Sound region of Washington. It sits in the city of SeaTac, about 14 miles (23 km) south of downtown Seattle and 18 miles (29 km) north of downtown Tacoma, and handled a record 52.7 million passengers in 2025.
Sea-Tac is the main hub of Alaska Airlines and a hub and international gateway for Delta Air Lines. United, Southwest, American and many foreign airlines also fly here, with routes across the United States and to Asia, Europe, Canada and Mexico.
The Main Terminal holds check-in and baggage claim, with Concourses A to D, and two satellite terminals, North and South, linked by the SEA Underground train. The International Arrivals Facility, east of Concourse A, opened in 2022.
The Link light rail 1 Line stops at the airport and runs north through downtown Seattle. Most travelers continue to downtown, Bellevue, Tacoma or the cruise terminals on the Seattle waterfront.
Airport operator, runways and traffic
- Operator
Port of Seattle
- Runways
Three parallel runways, 8,500 to 11,900 ft
- Passengers per year
About 52.7 million in 2025, a record
- Opened
1944; scheduled flights from 1947
- Hubs
Alaska Airlines (main hub) and Delta Air Lines
Arrival tips for Seattle-Tacoma International Airport
Your plane arrives at Concourse A, B, C or D or at the North or South Satellite. From the satellites, take the SEA Underground train to the Main Terminal, where baggage claim is.
If you arrive on an international flight, you clear US Customs and Border Protection in the International Arrivals Facility, east of Concourse A, opened in 2022. If you are eligible, Global Entry or Mobile Passport Control can shorten the line.
Domestic passengers go straight to baggage claim in the Main Terminal.
Taxis, ride apps (Lyft, Uber and Wingz) and pre-booked drivers each have their own pickup areas; check your terminal door in your confirmation. The Link light rail station is reached from the parking garage, and shuttle buses run to the rental car facility in about five minutes.
Ground transportation
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Book a transfer from SEAPrivate transfer from Sea-Tac
A pre-booked driver meets you at the Main Terminal and takes you to downtown Seattle, Bellevue, Tacoma or the cruise terminals. Handy with luggage or a cruise departure.
Link light rail
The 1 Line runs from SeaTac/Airport station north through downtown Seattle. Cheap and avoids freeway traffic.
Taxi from Sea-Tac
Taxis are managed by the Port of Seattle and pick up at the official taxi area.
Uber, Lyft and Wingz
Ride apps pick up at their designated area.
Rental car
Shuttle buses run to the consolidated rental car facility in about five minutes.
Moving between terminals
- 1
SEA Underground
A three-line automated train linking the Main Terminal concourses with the North and South Satellites.
Terminals
One Main Terminal with check-in and baggage claim, four concourses and two satellites.
Concourse A
Delta and other domestic airlines, next to the International Arrivals Facility.
Concourse B
Delta, United and Southwest.
Concourse C
Alaska Airlines only.
Concourse D
Alaska and American.
North Satellite
Alaska Airlines only, reached by the SEA Underground train.
South Satellite
All foreign airlines and some Delta international flights, reached by the SEA Underground train.
Airlines and destinations
Main airlines at Sea-Tac and the concourse each uses.
Alaska Airlines Concourse C
Also Concourse D and the North Satellite.
American Airlines Concourse D
Delta Air Lines Concourse A
Also Concourse B and some international flights from the South Satellite.
Southwest Airlines Concourse B
United Airlines Concourse B
Facilities
International Arrivals Facility
Opened in 2022 east of Concourse A, for US customs and immigration.
SEA Underground
Automated train to the North and South Satellites.
Link light rail station
SeaTac/Airport station on the 1 Line to downtown Seattle.
Rental car facility
A consolidated facility reached by a five-minute shuttle bus ride.
Accessibility and passenger assistance
Requesting assistance
Request wheelchair or mobility assistance through your airline when you book, and confirm it at least 48 hours before you fly.
Reduced mobility
The satellites are reached by train; ask your airline for assistance from the gate to baggage claim if needed.
Service animals
Rules for service and emotional support animals are set by each airline, so check with yours before you travel and carry the required documents.
Assistance on arrival
Airline staff meet passengers who requested assistance at the aircraft and accompany them through customs and baggage claim to the curb.
Frequently asked questions
How far is Sea-Tac airport from downtown Seattle?
Seattle-Tacoma International Airport is in SeaTac, about 14 miles (23 km) south of downtown Seattle and 18 miles (29 km) north of downtown Tacoma. The Link light rail 1 Line runs from the airport through downtown Seattle.
Is there a train from Sea-Tac to downtown Seattle?
Yes. Sound Transit's Link light rail stops at SeaTac/Airport station on the 1 Line, with trains north through downtown Seattle toward Lynnwood.
Which concourse does Alaska Airlines use at Sea-Tac?
Alaska Airlines, whose main hub is Sea-Tac, uses Concourse C, Concourse D and the North Satellite. Delta uses Concourses A and B, and foreign airlines use the South Satellite.
Where do international flights arrive at Sea-Tac?
International arrivals clear US Customs and Border Protection in the International Arrivals Facility, which opened in 2022 east of Concourse A. Many international flights park at the South Satellite.
How do I get to the rental cars at Sea-Tac?
Take the shuttle bus from the Main Terminal to the consolidated rental car facility, a ride of about five minutes. The facility opened in 2012 and houses the airport's rental companies.