How to Navigate Seattle-Tacoma International Airport Inside & Out
Seattle Airport Guide
Between mountain views, coffee aromas, and one of the Pacific Northwest’s busiest travel hubs, there’s a lot happening at SEA. Learn how to navigate the Seattle airport so you can move smoothly from curb to gate while discovering a few hidden gems before or after your flight.
Seattle-Tacoma International Airport Quick Facts
Official name: Seattle-Tacoma International Airport. The name reflects the two major cities it serves—Seattle and Tacoma—and the airport sits between them.
Official website: https://www.portseattle.org/sea-tac
Airport code: SEA, short for Seattle
Airport history: Seattle-Tacoma International Airport opened in 1944. It was built during World War II to replace Seattle’s previous commercial airfield, Boeing Field. SEA has expanded many times since, including modernization projects, the addition of runways, and the International Arrivals Facility, which opened in 2022 to improve international passenger travel.
Number of terminals: Seattle-Tacoma International Airport operates as one main terminal with six concourses: A, B, C, D, North Satellite (N Concourse), and South Satellite (S Concourse). The N and S Concourses are housed in separate buildings, accessible via the airport’s train system.
Tricks to Navigating SEA
Here are some quick tips to help you learn how to navigate the Seattle airport:
- Concourses S and N are separate from the main terminal: The two satellite concourses are in separate buildings, breaking away from the main Seattle airport layout. If your flight departs from N or S, you’ll need to take the underground train.
- Security checkpoints throughout the terminal: You’ll find multiple checkpoints in the main terminal, with wait times often varying across them.
- International arrivals: If you’re meeting someone arriving from overseas, they’ll exit near the south end of the terminal in a different area than domestic arrivals. Remember that international passengers may need 60 minutes or more to clear customs after their flight touches down.
Outside the Terminal
Most drivers reach Seattle-Tacoma International Airport via State Route 518, the short highway that connects the airport directly to I-5 and State Route 509. Once you exit onto the airport access road, signs guide you into the main terminal loop.
SEA uses multiple curbside levels to manage traffic. The upper level is used for departures near the ticketing counters, while the lower level serves arrivals and baggage claim pickups.
Avis operates from SEA’s Rental Car Facility, located off airport property on 160th St. Travelers can take free shuttle buses from the terminal to reach the facility. If you’re dropping off a rental before your flight, follow the signs for Rental Car Return when approaching the airport.
Inside the Terminal
Seattle-Tacoma International Airport has a single main terminal with check-in, security checkpoints, and baggage claim all located there. After passing through a TSA checkpoint, travelers branch out to the airport’s six concourses: A, B, C, D, N, and S.
The Seattle airport layout means some gates are within walking distance, while others require the airport’s underground trains. The Blue Line has stops near the A, B, and S gates. The Green Line has stops for D, C, and N gates. The Yellow Line runs between the A gates and D gates.
Arriving passengers return to the main terminal area for baggage claim on the lower level. Exiting from the lower level leads to the airport’s curbside pickup and transportation options, including shuttles to the Rental Car Facility.
How to Change Terminals at SEA
Mostly. Concourses A, B, C, and D are connected by indoor walkways. However, Concourses N and S are in separate, satellite buildings, so you’ll need to use the underground train to reach them.
Yes. The airport operates three underground train lines that connect the central terminal with Concourses N and S, making it easier to move across the Seattle airport layout. Outside the terminal, free shuttle buses also run regularly between the airport and the off-site rental car facility.
Hidden Gems at Seattle-Tacoma International Airport
SEA has a few spots worth exploring if you’re not rushing straight to your gate. These are some lesser-known things to do in the Seattle airport:
- Music at SEA: Live musicians regularly perform throughout the terminal as part of the airport’s Music at SEA program.
- Little Free Library: Book lovers may stumble across a Little Free Library where travelers can take a book or leave one behind. You’ll find a children-focused Little Free Library near the play area in Concourse A and a general library across from Gate A3.
- Interfaith Prayer and Meditation Room: This quiet room offers a calm place for reflection, prayer, or meditation.
Beyond the Seattle-Tacoma International Airport
Facing a longer layover? You might have the perfect opportunity to explore the city. Renting from our location at SEA or one of our Avis Seattle locations makes it easy to explore spots like Pike Place Market, walk the waterfront near the Seattle Aquarium, or take in skyline views from Kerry Park.
Want more ideas for your itinerary? Whether you’re sightseeing or here on business, our Things to Do in Seattle Guide and our Business Travel in Seattle Guide offer helpful ideas to help you make the most of your time in the city.
Rent a Car at SEA from Avis
Renting from Avis at Seattle-Tacoma International Airport is a convenient way to explore the city and the surrounding region. Whether you're heading downtown, driving along Puget Sound, or starting a Pacific Northwest road trip, an Avis rental gives you the flexibility to travel on your schedule. Start your reservation today!
Book a SEA Car Rental