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SEA

Seattle-Tacoma International Airport

Seattle, Washington 8 terminals Updated Oct. 9, 2026

SEA Airport Guide: Concourses, Airlines, Train and Wi-Fi

Seattle-Tacoma International Airport (SEA) has one Main Terminal with four concourses (A, B, C and D) and two satellites (N and S), linked by an underground train. It is a hub for Alaska Airlines and Delta. Delta uses A and B, Southwest, Frontier and United use B, American uses D, and Alaska uses C, D and N. Most international airlines use S. SEA served 52,715,181 passengers in 2025.

TSA wait times How busy will SEA security be? Pick your flight time: hour-by-hour forecast for every checkpoint, from official TSA data. Check security
New baggage claim hall with a colorful mural at Seattle-Tacoma International Airport
Photo by Zoshua Colah on Unsplash

Key facts

Terminals 8 Main Terminal, Central Terminal, Concourse A, Concourse B, Concourse C, Concourse D, N Concourse, S Concourse
Airlines 37 In the official directory
To Downtown Seattle 14 mi By road
Last checked 10/09/2026 Checked by our team

What do you need?

ParkingOfficial lots, cheaper off-site options and where to wait for pickups. HotelsHotels at and near the airport, shuttles and sleeping in the terminal. To the cityTrains, buses, taxis, rideshare and private transfers. LoungesWhich lounge is in your terminal and how to get in without status. SecurityWait times by terminal, fast lanes and what to have ready. FoodBest bites terminal by terminal, before or after security. Lost and foundWho to contact: your airline, the terminal or the airport. Car rentalWhere the rental counters are and how to reach them. WifiHow to connect, charging spots and an eSIM if you land abroad.

Terminals at a glance

  • Main Terminal
    Open

    Main airlines: No airline gates. The Main Terminal is the building with ticketing, baggage claim, the six security checkpoints and ground transportation. Skybridges link it to the parking garage. International arrivals exit at Gina Marie Lindsey Hall at its south end.

    Check in, clear security and board the train to your concourse from here. International arrivals come out at the south end, near the international airlines.

    Official Main Terminal map
  • Central Terminal
    Open

    Main airlines: No airline gates. The Central Terminal is the dining and shopping hall between the concourses, with the Amex Centurion Lounge on the mezzanine. The airport's Central Terminal map (September 1, 2026) also lists an Alaska Lounge and a Delta Sky Club, but the airport's lounge directory places the Alaska Lounges near gates C16A, N15 and D1 and the Delta Sky Club near A1. Check the interactive map.

    The dining and shopping hall: 12 restaurants and bars, ten shops, a children's play area and a nursing room.

    Official Central Terminal map
  • Concourse A
    Open

    Main airlines: Delta Air Lines (A and B Concourses) and WestJet (A and B Concourses). The official airline directory shows only the concourse, not exact gates. The International Arrivals Facility connects to the A Concourse. An older 2021 train guide also listed Aer Lingus, Air Canada, Japan Airlines, JetBlue and United at A, so confirm your gate on your boarding pass. The airport's 2021 guide and its current directory disagree on these airlines.

    Delta's concourse (with WestJet). The Delta One Lounge and Delta Sky Club building opened June 26, 2025, and international arrivals connect here.

    Official Concourse A map
  • Concourse B
    Open

    Main airlines: Delta Air Lines, Frontier Airlines, Southwest Airlines, United Airlines and WestJet. Delta and WestJet are listed at both A and B. The official airline directory shows only the concourse, not exact gates.

    Home to Southwest, Frontier and United, with Delta and WestJet sharing it with A. Delta lists 18 preferential gates at SEA.

    Official Concourse B map
  • Concourse C
    Open

    Main airlines: Alaska Airlines (listed at C, D and N Concourses). SEA's train guide says most Alaska flights use gates on C, D and N.

    An Alaska Airlines concourse on the north side. The Cascadia glass art piece is between gates C15 and C16.

    Official Concourse C map
  • Concourse D
    Open

    Main airlines: Alaska Airlines (listed at C, D and N Concourses) and American Airlines.

    American Airlines flies from here, with some Alaska flights.

    Official Concourse D map
  • N Concourse
    Open

    Main airlines: Alaska Airlines (listed at C, D and N Concourses). Reached by the train.

    An Alaska Airlines satellite, modernized and finished in Q4 2021. You take the train to reach it.

    Official N Concourse map
  • S Concourse
    Open

    Main airlines: Aer Lingus, AeroMexico, Air Canada, Air France, ANA, Asiana, British Airways, Cathay Pacific, China Airlines, Condor, Emirates, EVA Air, Finnair, Hainan Airlines, Hawaiian Airlines, Icelandair, Japan Airlines, JetBlue Airways, Korean Air, Lufthansa, Philippine Airlines, Qatar Airways, SAS, Singapore Airlines, STARLUX Airlines, Turkish Airlines, Virgin Atlantic and Volaris. The official directory also lists Air Mobility Command and Sun Country with 'Refer To Your Boarding Pass'. SEA's 2021 train guide placed some of these airlines (Aer Lingus, Air Canada, Japan Airlines, JetBlue) at A, so confirm yours on your boarding pass.

    The satellite where most international airlines fly from. You must take the train to reach it.

    Official S Concourse map

SEA concourses and airlines by concourse

SEA has one Main Terminal (ticketing, baggage claim, the security checkpoints) and, after security, four concourses (A, B, C, D) and two satellites (N and S). The Central Terminal is the dining and shopping hall between the concourses. Here is where airlines fly from, according to SEA's official airline directory:

  • A Concourse: Delta Air Lines and WestJet. The International Arrivals Facility connects to A.
  • B Concourse: Delta, Frontier, Southwest, United and WestJet.
  • C Concourse: Alaska Airlines.
  • D Concourse: Alaska Airlines and American Airlines.
  • N Concourse: Alaska Airlines.
  • S Concourse: Aer Lingus, AeroMexico, Air Canada, Air France, ANA, Asiana, British Airways, Cathay Pacific, China Airlines, Condor, Emirates, EVA Air, Finnair, Hainan, Hawaiian, Icelandair, Japan Airlines, JetBlue, Korean Air, Lufthansa, Philippine Airlines, Qatar Airways, SAS, Singapore Airlines, STARLUX, Turkish, Virgin Atlantic and Volaris.
  • Air Mobility Command and Sun Country: the directory says to refer to your boarding pass.

The directory shows only the concourse, not exact gates. An older 2021 train guide lists some airlines differently, for example United and JetBlue at A. Airlines move, so confirm your concourse on your boarding pass, the airport screens or the flySEA app.

Hub airlines at SEA

SEA is a hub for two airlines.

  • Alaska Airlines: Alaska Air Group says its Seattle hub is the largest on the West Coast of any carrier, serving 104 nonstop destinations (Alaska Air Group release, December 2024). Alaska flies from C, D and N, and its lounges are near gates C16A, D1 and N15.
  • Delta: Delta calls Seattle its hub and says it operates nearly 162 peak-day departures to 57 destinations from SEA (Delta, September 2025). It has 18 preferential gates at SEA. Delta says its Delta One Lounge and Delta Sky Club complex is across from Gate A11, while the Port's lounge directory lists the Sky Club near A1 and a Sky Lounge near A11.

What this means for you: a connection on Alaska or Delta can be a short train ride. Hub schedules change, so use your airline's app for gates.

What's changing at SEA right now

Check these before you fly:

  • SEA Spot Saver, the security reservation program, will no longer be available starting November 30, 2026. Reservations booked through November 29 will be honored at TSA Checkpoint 4.
  • A banner on the Port's reserved parking page says Reserved Parking in the garage expands to Level 5 on October 13. It shows no year, so check the page if you plan to park.
  • The Port announced duty-free expansions on October 6, 2026, and 17 new dining and retail stores on September 15, 2026. It has not published opening dates.
  • The Delta One Lounge and Delta Sky Club building at the end of the A Concourse opened June 26, 2025.
  • The station and escalator upgrade at Concourse C, which connects to the North Satellite and Main Terminal train, is listed as completed.
  • The airport lists traffic and roadway construction alerts on its ground transportation pages. Check them before you drive.

Arrivals, departures and security

SEA says to arrive two hours before a domestic flight and three hours before an international one. The Port says more than one third of daily passengers arrive before 9 a.m., with other peaks from 2 to 5 p.m. and 9 to 11 p.m.

For flight times and gate changes, check your airline or portseattle.org.

The SEA home page and portseattle.org/page/live-estimated-checkpoint-wait-times show live wait times for Checkpoints 1 to 6. Look before you leave.

Checkpoint 4 also takes SEA Spot Saver reservations until November 30, 2026. People who are not flying can get a SEA Visitor Pass for Checkpoint 4 (domestic arrivals only).

Getting around SEA

After you clear security, all concourses are connected, and you do not have to go through TSA again when you connect. SEA says the airport is small enough that it usually takes two to five minutes to reach where you are going.

The train, the SEA Underground, is how you get between concourses. If your gate is on the N or S Concourse, you need it. The Port's blog says a train arrives every three minutes (September 2025). The airport doesn't publish operating hours. SEA's train guide (2020 and 2021 versions, so check the signs) describes three loops:

  • Yellow Line (terminal shuttle): connects the S, B and A stations with the N, C and D stations. The D and A stations are linked.
  • Blue Line (south loop): serves A, B and S. A Station is across from Gate A3, B Station is down the escalators at gates B20 and B21, and S Station is below the S gates.
  • Green Line (north loop): serves D, N and C, which is the loop for most Alaska flights. D Station is across from Gate D2, and C Station is by Gate C11.

Train signs and announcements are in several languages. The interactive map and the flySEA app (iOS and Android) give directions to your gate.

Food and drink at SEA

The Central Terminal is SEA's main dining hall. The airport's Central Terminal map (September 1, 2026) lists these dining options: BrewTop Social, Dilettante Mocha Cafe, Evergreens, Koi Shi Sushi Bento, Lucky Louie Fish Shack, Pallino, Pei Wei Asian Kitchen, QDOBA, Salty's at SEA, Starbucks Evenings, Taco Street and Vyne Tasting Room.

Retail there: Coach, Dufry Duty Free, Fireworks, Hudson, MAC, Made in Washington, Marmot, Planewear, Seattle Chocolates and TUMI. The Baggage Claim level has a Starbucks, an Urban Market and a 7-Eleven.

Other concourses have more options, and SEA says new dining and retail stores are coming. Use ExploreSEA.org or the interactive map for hours and for what is before or after security.

Wi-Fi

Connect to SEA-FREE-WIFI. The Port says Wi-Fi is free in all public areas of the airport. You accept terms and conditions and may see a short ad. The airport's user agreement notes that access points may not reach every area, and the Port may limit bandwidth or some websites.

International arrivals and customs

International flights arrive at the International Arrivals Facility, which connects to the A Concourse. The Port gives three steps: 1. Bags first. You must claim your checked bags before passport control, even if you connect. 2. Passport control with U.S. Customs and Border Protection. Global Entry is available for all international flights. Mobile Passport Control is free for U.S. and Canadian citizens. The Port says processing can take 60 minutes or longer in peak periods and suggests at least three hours between landing and a connecting flight (its connections page says 2 to 3 hours). 3. Connect or exit. Connecting passengers recheck their bags with their airline, go through TSA and arrive in the A Concourse. The International Arrivals Facility TSA checkpoint is open 6 a.m. to 9:45 p.m. Pacific Time, and PreCheck is only at the main terminal checkpoints. Everyone else exits to Gina Marie Lindsey Hall on the Baggage Claim level at the south end of the terminal, near the international airlines.

Meeting someone? Friends and family can meet most international arrivals at Gina Marie Lindsey Hall without a pass. If a passenger comes from Dublin or Calgary, Edmonton, Montreal, Toronto or Vancouver, they have already cleared U.S. entry, so you can meet them at the arrival gate with a SEA Visitor Pass. The Global Entry enrollment office is on the Baggage Claim level; the Port lists it open Monday to Friday, 8 a.m. to 4 p.m.

Cruise passengers

Seattle is a cruise port, and many cruise passengers fly through SEA. Ships sail from Pier 91 (Smith Cove) and Pier 66 (Bell Street), not from the airport. SEA has a Cruise Lobby and a charter bus area on Level 1 of the parking garage.

The Port says Metro bus service is not a convenient option to either cruise terminal: for Pier 91, routes 24 and 33 from downtown stop on a bridge, about a 10 minute walk down a staircase, and Pier 66 has no bus service from the downtown core. Check Metro's trip planner.

Port Valet is free luggage transfer from the ship to your airline if you fly home the day you disembark, on Alaska, American, Delta, Horizon, JetBlue, Southwest or United flights leaving after noon (Delta domestic only). Carnival, Celebrity, Cunard, Holland America, Norwegian, Princess and Royal Caribbean take part. Enroll before your cruise or onboard.

Lost and found

The Airport Lost and Found Office is on the Baggage Claim Level across from Carousel 13. SEA lists it as open daily from 8 a.m. to 6 p.m. Pacific Time. Call (206) 787-5312. Filing is free, and you can report an item online at sea.odinlf.com/lost-item-inquiry. Lost and Found offers FedEx shipping through the online system, or someone can claim the item for you. Items are held for a minimum of 30 days.

For something left on a plane, contact your airline. For something left in an airport taxi, call Curbside Management at 206-708-6504.

Baggage storage

Smarte Carte runs a baggage storage service on the Baggage Claim Level between Carousels 9 and 10. SEA lists it as first-come, first-served with no reservations needed, open 7 a.m. to 10 p.m. daily, with short closures from 11:30 a.m. to noon and 6 to 6:30 p.m. The price isn't on the airport's page, so ask at the counter.

SEA does not handle airline bags itself. For delayed or damaged bags, contact your airline; the Port's Airline Baggage Information page lists each airline's baggage phone or form. The baggage claim carousels are numbered 2 to 16 and the screens show yours. Luggage carts are at the international arrivals facility, baggage claim, curbside and the parking garage.

Other services

  • Customer Care: daily 8 a.m. to 5 p.m. Pacific at (206) 787-5388 or (800) 544-1965. In the terminal, look for staff in bright green or the Information Booth.
  • Ground Transportation Booth: (206) 787-5906.
  • Prayer and meditation: two Interfaith Prayer and Meditation Rooms, in the A and C Concourses, plus a space before security near Skybridge 2.
  • Families: the Central Terminal has a children's play area and a nursing room. The airport maps also mark nursing rooms, pet relief areas and adult changing tables.
  • Lounges: the Central Terminal map shows the Alaska Lounge, Amex Centurion Lounge and Delta Sky Club, but the airport's lounge directory places the Alaska Lounges near gates C16A, N15 and D1 and the Delta Sky Club near A1. Other clubs are near gates A9, A11, A12 and S10. See the interactive map.
  • Accessibility: contact your airline in advance for wheelchair or medical help. Airlines coordinate wheelchair service from the ticket counter to the gate.
  • Light rail: the Link station connects to Level 4 of the garage. Link runs 5 a.m. to 1 a.m. Monday to Saturday and 6 a.m. to midnight on Sundays and holidays, every 7 to 15 minutes.

Exchange rates today

1 USD = 0.893 EUR · 0.748 GBP · 1.400 CAD · 18.782 MXN · 156.800 JPY · 6.670 CNY

ECB reference rates via Frankfurter (2026-10-23), for information only. Exchange desks apply their own rates.

  • Airport Lost and Found Office

    Main Terminal

    Free. Report online at sea.odinlf.com/lost-item-inquiry or call (206) 787-5312. Items held at least 30 days.

    Hours
    Daily 8 a.m. to 6 p.m. Pacific
    Open in Maps

  • Smarte Carte Baggage Storage

    Main Terminal

    First-come, first-served, no reservations. The price is not on the airport's page, so ask at the counter.

    Hours
    Daily 7 a.m. to 10 p.m. (closed 11:30 a.m. to noon and 6 to 6:30 p.m.)
    Open in Maps

  • SEA Underground train

    Connects the Main Terminal side to concourses A, B, C, D, N and S. Required for the N and S Gates. A train arrives every three minutes according to the Port's blog (September 2025). Station details come from the Port's train guide.

  • Gina Marie Lindsey Hall (International Arrivals)

    Main Terminal Before security

    Baggage Claim level, very south end of the terminal near the international airlines. International passengers exit here after Customs, and friends and family can meet them without a Visitor Pass.

    Open in Maps

  • Global Entry enrollment office

    Main Terminal Before security

    Services listed on the Baggage Claim level map. The Port says enrollment centers are open Monday to Friday, 8 a.m. to 4 p.m.

    Hours
    Monday to Friday, 8 a.m. to 4 p.m.
    Open in Maps

  • TSA Cares helpline

    Free help for travelers with disabilities or medical conditions. Call at least 72 hours before you fly.

    Hours
    Weekdays 8 a.m. to 11 p.m. ET; weekends and holidays 9 a.m. to 8 p.m. ET

  • EV charging at SEA

    Main Terminal Before security

    94 EV stalls with free Level 2 charging for parking customers: 64 on General Parking Floor 7 (Rows E and F) and 30 on Floor 4 (Rows E and F).

    Open in Maps

  • Accessible parking

    Before security

    ADA stalls on General Parking Floor 5 and Reserved Parking Floor 4. Call Prospect Airport Services at (206) 246-1550 on arrival for wheelchair assistance.

    Open in Maps

  • Ground Transportation Booth

    Central Terminal Before security

    Help with taxis, rideshare, shuttles and buses. Phone (206) 787-5906.

    Open in Maps

  • USO Center

    Central Terminal After security

    On the mezzanine level above Checkpoint 4. For U.S. military members.

    Hours
    Sun 8 a.m. to 8 p.m.; Mon, Wed, Sat 8 a.m. to 4 a.m. (next day); Tue, Thu, Fri 8 a.m. to midnight
    Open in Maps

Questions travelers ask

How many terminals does SEA have?

SEA has one Main Terminal with four concourses (A, B, C, D) and two satellites (N and S), linked by an underground train. The Central Terminal is the dining and shopping hall.

Which concourse is my airline at SEA?

Delta is at A and B, Southwest, Frontier and United at B, American at D, and Alaska at C, D and N. Most international airlines use S. Check your boarding pass, since airlines move.

Do I have to take a train at SEA?

Sometimes. SEA says you need the train if you are at the N or S Gates. Otherwise it is optional and can be faster. The Port's blog says a train arrives every three minutes.

Do I go through security again if I connect at SEA?

No. SEA says that after you arrive you do not have to go through TSA again and can go straight to your next flight.

How many airlines fly out of SEA?

SEA's official airline directory lists 37 airlines, and its page says they serve 96 nonstop domestic and 36 international destinations.

How many passengers does SEA have each year?

SEA recorded 52,715,181 passengers in 2025, a new annual record, according to the Port of Seattle.

Is Wi-Fi free at SEA?

Yes. Connect to SEA-FREE-WIFI. The Port says it is free in all public areas, and the user agreement notes it may not reach every area.

Where is lost and found at SEA?

On the Baggage Claim Level across from Carousel 13, open daily 8 a.m. to 6 p.m. Call (206) 787-5312 or file online at sea.odinlf.com/lost-item-inquiry.

Does SEA have luggage storage?

Yes. Smarte Carte baggage storage is on the Baggage Claim Level between Carousels 9 and 10, open 7 a.m. to 10 p.m. daily (short closures 11:30 a.m. to noon and 6 to 6:30 p.m.), first-come, first-served.

Is SEA Spot Saver ending?

Yes. SEA Spot Saver will no longer be available starting November 30, 2026. Reservations booked through November 29 will be honored at TSA Checkpoint 4.

Is SEA a hub for Alaska Airlines or Delta?

Both. Alaska Air Group calls its Seattle hub the largest on the West Coast, with 104 nonstop destinations. Delta calls SEA its hub, with nearly 162 peak-day departures to 57 destinations.

Where do international flights arrive at SEA?

At the International Arrivals Facility, connected to the A Concourse. You claim bags, clear Customs, then exit to Gina Marie Lindsey Hall at the south end of the Baggage Claim level or connect.

Does SEA have Global Entry or Mobile Passport Control?

Yes. The Port says Global Entry is available for all international flights arriving at SEA, and Mobile Passport Control is free for U.S. and Canadian citizens. For a connection, the Port suggests allowing 2 to 3 hours or more.

What is the SEA Wi-Fi network name?

SEA-FREE-WIFI.

How often does the SEA train run?

The Port's blog says a train arrives every three minutes (September 2025). The airport doesn't publish operating hours.

How do cruise passengers get between SEA and the cruise terminals?

Cruise ships sail from Pier 91 and Pier 66. The Port says Metro bus service is not a convenient option to either, so ask your cruise line about transfers or use a taxi or rideshare. SEA has a Cruise Lobby on Level 1 of the garage.

Sources and last check

Checked by our team on Oct. 9, 2026 against these official sources: