Seattle-Tacoma International Airport
Seattle-Tacoma International Airport, commonly known as Sea-Tac, lies approximately 22 kilometers south of downtown Seattle in the city of SeaTac, Washington. It serves as the primary international gateway for the Pacific Northwest region of the United States. The airport opened in 1949, built to replace Boeing Field as the area's main commercial airport, and has since grown into one of the busiest in North America.
Overview
Seattle-Tacoma International Airport, commonly known as Sea-Tac, lies approximately 22 kilometers south of downtown Seattle in the city of SeaTac, Washington. It serves as the primary international gateway for the Pacific Northwest region of the United States. The airport opened in 1949, built to replace Boeing Field as the area's main commercial airport, and has since grown into one of the busiest in North America.
Seattle-Tacoma International Airport is most useful when its route network, ground transport and terminal setup match the trip you are taking. Before booking, compare the scheduled departure time with the airport location, connection window and any baggage or check-in requirements attached to your airline.
Airlines
Sea-Tac is a major hub for Alaska Airlines, which is headquartered in the Seattle area, and serves as a significant hub for Delta Air Lines. Numerous international carriers operate here, including British Airways, Lufthansa, Air France, Emirates, Korean Air, and All Nippon Airways, connecting the Pacific Northwest with Europe, Asia, and the Middle East.
For any airport, the operating airline matters as much as the marketing airline shown in a search result. Codeshares, partner flights and regional affiliates can affect check-in desks, terminal use, baggage handling and support if a flight is delayed or changed.
Terminals and Transfers
Sea-Tac operates a single main terminal with multiple concourses and two satellite buildings connected by an underground transit system. The North Satellite handles primarily domestic flights, while the South Satellite is dedicated to international arrivals and departures. The airport has three parallel north-south runways and operates 24 hours a day. Ongoing expansion projects continue to modernize concourses and improve international processing.
Connections through SEA need more planning when flights are on separate tickets, when checked baggage is involved, or when the itinerary changes between domestic and international processing. Build a wider buffer if you need to collect bags, move between terminals or pass through security again.
Ground Transport and Trip Planning
Seattle-Tacoma International Airport ground transport should be planned around your arrival time, luggage and final destination. Public transport can be efficient where available, while taxis, rideshare and private transfers may be easier for late arrivals, families or travellers with multiple bags.
If you are choosing between airports or routes, compare SEA against the destinations currently tracked from this airport, including Chicago, San Francisco, Los Angeles. The best itinerary is not always the cheapest one if it creates a difficult transfer, a tight connection or a long onward journey.
Practical guide
Using Seattle-Tacoma International Airport without guesswork
Plan SEA around the terminal you use, the type of connection you are making and how predictable you need the trip into Seattle to be.
Confirm whether your flight uses a domestic, international or regional area at SEA. Airport layouts vary, and terminal assumptions are a common source of missed connections.
Sea-Tac operates a single main terminal with multiple concourses and two satellite buildings connected by an underground transit system. The North Satellite handles primarily domestic flights, while the South Satellite i
Leave extra time when changing terminals, travelling with checked luggage, or arriving during busy morning, evening, holiday or event periods.
Before you leave for SEA
- 1Confirm the terminal and operating airline before leaving for SEA.
- 2Check baggage cut-off times if you are travelling with checked luggage.
- 3Leave extra time for international processing or terminal changes.
- 4Compare ground transport options against traffic and arrival time.
- 5Recheck the flight status before travelling to the airport.
Start here
Terminal and transfer notes
Confirm whether your flight uses a domestic, international or regional area at SEA. Airport layouts vary, and terminal assumptions are a common source of missed connections.
Sea-Tac operates a single main terminal with multiple concourses and two satellite buildings connected by an underground transit system. The North Satellite handles primarily domestic flights, while the South Satellite i
Leave extra time when changing terminals, travelling with checked luggage, or arriving during busy morning, evening, holiday or event periods.
For Seattle-Tacoma International Airport, the safest connection plan is based on the operating airline, the terminal shown on your booking and whether your baggage is checked through. If the itinerary uses separate tickets, choose a larger buffer.
Airlines
Airlines flying from SEA
Compare the carriers connected with SEA, including airline codes, operating brands and routes currently tracked from this airport.
Routes
Top routes from SEA
Use these route cards to scan popular destinations, estimated distance and flight time before checking live schedules and fares.
Official planning details
Transfers, fares, parking and passenger services at SEA
A source-linked planning layer for details that can change: terminal transfers, transport costs, parking, lounges and accessibility.
Terminal transfer links
TransfersSeattle-Tacoma International Airport transfer details can depend on airline, terminal, baggage handling and whether flights are booked on one ticket. Check the operating airline and airport website before relying on a tight connection at SEA.
Check airport transfer informationTransport fares and local access
FaresTransport costs to and from Seattle can vary by public transport, taxi, rideshare, private transfer, tolls and time of day. Confirm current fares before travelling, especially for late arrivals or peak periods.
Review transport informationParking and pre-booking
ParkingParking at Seattle-Tacoma International Airport may vary by terminal, short-stay area, long-stay area and online booking rules. Compare official parking options with drop-off, pick-up and ground transport before choosing how to reach the airport.
Review airport parking optionsLounges and eligibility
LoungesLounge availability at SEA depends on airline, cabin, alliance status, membership or paid-entry rules. Check the operating airline before travel because access rules and opening hours can change.
Check lounge informationAccessibility and assistance
AccessPassengers needing mobility, sensory, medical or other assistance should confirm airport facilities and arrange airline assistance before travel. Airline-provided help is usually requested through the airline or booking channel.
Review accessibility informationTerminal and parking maps
MapsMaps are useful for finding check-in areas, arrivals paths, parking locations and ground transport pick-up points at Seattle-Tacoma International Airport. Confirm the terminal before leaving for the airport.
Open airport mapBudget check
Useful cost notes
Prices can change, so use these notes to spot likely cost items before checking the official source.
Public transport, taxi, rideshare and private-transfer prices around SEA can change by time, distance, demand and local fees.
Parking prices often vary by car park, stay length and whether online pre-booking is available.
Seat selection, baggage, lounge access, tolls and late-night transport can change the real cost of a trip.
Nearby airports
Other airports in United States
Nearby airport options can help when comparing fares, connection times, ground transport and alternate arrival points in United States.
FAQ
Seattle-Tacoma International Airport — frequently asked questions
Quick answers to the details travellers usually check first, from codes and locations to the practical basics that help with planning.
9 common questions
- Seattle-Tacoma International Airport is located in Seattle, United States (North America), at coordinates 47.440°, -122.300°.
- Its IATA code is SEA and its ICAO code is KSEA.
- Seattle-Tacoma International Airport serves Seattle, United States. When comparing fares, check whether other airports also serve the same area — prices and transfer times can differ between them.
- Seattle-Tacoma International Airport operates on America/Los_Angeles local time. Departure and arrival times on tickets are always shown in each airport's local time, so double-check the offset when planning connections or pick-ups.
- Seattle-Tacoma International Airport sits at latitude 47.440° and longitude -122.300°. The map link in the details panel on this page opens the exact location for driving directions.
- Carriers tracked on routes from SEA include American Airlines, Alaska Airlines, Etihad Airways, Gulf Air, Royal Jordanian, United Airlines and 5 more.
- Tracked destinations from SEA include Chicago, San Francisco and Los Angeles.
- Its address is 17801 International Boulevard, Seattle, Washington, 98158, United States, the phone number is +1 206-787-5388, the official website is http://www.portseattle.org/Sea-Tac. For flight-specific questions (delays, baggage, rebooking), contact the operating airline directly rather than the airport.
- Yes — Originfacts lists 9 other airports in United States. The nearby-airports section on this page links to each of them, which is useful when comparing fares or finding an alternative departure point.