SEAAirport Guide

Terminal & concourses

The airport's single terminal, with six concourses: A, B and S at the south end and C, D and N at the north end. The Port says the terminal is small enough that you can get where you are going in two to five minutes using the SEA Underground.

More in our guide: Everything to eat and buy at SEA, concourse by concourse.

The completed north ticketing hall and Alaska check-in area at Seattle-Tacoma International Airport
North ticketing hall · SEA

A Concourse

The moving walkway, art displays and window wall along SEA’s A Concourse
A Concourse · SEA

Airside, with Gates A1–A14, A20 and A21 on the map; A Station, across from Gate A3, serves the Blue and Yellow Lines.

After security

Also here

B Concourse

Bronze fish in the terrazzo floor leading through SEA’s B Concourse
B Concourse · SEA

Airside, with Gates B1, B3–B12, B5a, B7a, B14, B15, B20 and B21 on the map; B Station, below Gates B20 and B21 at the end of the concourse, serves the Blue Line.

After security

Also here

C Concourse

The Grand Stairs and faceted timber Tree at C inside SEA’s expanded C Concourse
C Concourse expansion · SEA

Airside, with gates at C2, C3, C9–C11, C15–C18 and C20 on the map, several split into lettered positions such as C2A/B; C Station, by Gate C11, serves the Green Line. The C Concourse expansion grows the 81,000-square-foot building into a 229,500-square-foot facility, and its main floor is the Marketplace at C, with dining and retail framing a tiered, open amphitheater with space for live music.

After security

Also here

D Concourse

The timber roof, glass mezzanine and red seating inside SEA’s completed Concourse D Annex
Concourse D Annex · SEA

Airside, with Gates D1–D11 and D20–D26 on the map, including the D Annex (D21–D26) across from Gate D5; D Station, across from Gate D2, serves the Green and Yellow Lines. The D Annex is a two-story, 32,400-square-foot building with six holdroom gates, reached from the D Concourse over a bridge; passengers walk through a gate door to a shuttle that takes them to an aircraft parked away from the terminal.

After security

Also here

N Concourse

The woven Boundary sculpture, glass elevator and airfield windows in SEA’s N Concourse
N Concourse Central Marketplace · SEA

Airside satellite with Gates N1–N20, reached by the Green Line at N Station below the concourse, or by bus during train outages.

After security

Also here

S Concourse

Circular ceiling lights and lounge seating inside SEA’s existing S Concourse
S Concourse · SEA

Airside satellite with Gates S1–S12, S15 and S16, reached by the Blue Line at S Station below the concourse, or by bus during train outages. It is the main hub for international passengers and stays open and operational during its multi-phase renovation, so expect construction in the coming years.

After security

Also here

Airlines departing from Main Terminal

37 airlines print a Main concourse among their departure gates. Carriers marked “also elsewhere” print another terminal's concourse too, so check your boarding pass. The full airline list covers all 37.

AirlineConcourseCheck-in
Aer LingusSMain Terminal ticketing level (Level 5), before security
AeroMexicoSMain Terminal ticketing level (Level 5), before security
Air CanadaSMain Terminal ticketing level (Level 5), before security
Air FranceSMain Terminal ticketing level (Level 5), before security
Alaska AirlinesC / D / NMain Terminal ticketing level (Level 5), before security, with a check-in point near Door 29; self check-in kiosks, bag tag stations and bag drops are also on Level 4 by Skybridges 5 and 6
AMC (Air Mobility Command)Main TerminalLast six counters on the Main Terminal ticketing level, next to Checkpoint 2, for duty passengers on travel orders; check-in opens 6 hours before departure
American AirlinesDMain Terminal ticketing level (Level 5), before security
ANA (All Nippon Airways)SMain Terminal ticketing level (Level 5), before security
Asiana AirlinesSMain Terminal ticketing level (Level 5), before security
British AirwaysSMain Terminal ticketing level (Level 5), before security
Cathay PacificSMain Terminal ticketing level (Level 5), before security
China AirlinesSMain Terminal ticketing level (Level 5), before security
CondorSMain Terminal ticketing level (Level 5), before security
Delta Air LinesA / BMain Terminal ticketing level (Level 5), before security; curbside check-in on the upper departures drive near Door 17
EmiratesSMain Terminal ticketing level (Level 5), before security
EVA AirSMain Terminal ticketing level (Level 5), before security
FinnairSMain Terminal ticketing level (Level 5), before security
Frontier AirlinesBMain Terminal ticketing level (Level 5), before security
Hainan AirlinesSMain Terminal ticketing level (Level 5), before security
Hawaiian AirlinesSMain Terminal ticketing level (Level 5), before security; an Alaska and Hawaiian Guest Services point is on the same level
IcelandairSMain Terminal ticketing level (Level 5), before security, near Door 19
Japan AirlinesSMain Terminal ticketing level (Level 5), before security
JetBlue AirwaysSMain Terminal ticketing level (Level 5), before security
Korean AirSMain Terminal ticketing level (Level 5), before security
LufthansaSMain Terminal ticketing level (Level 5), before security
Philippine AirlinesSMain Terminal ticketing level (Level 5), before security
Qatar AirwaysSMain Terminal ticketing level (Level 5), before security
SASSMain Terminal ticketing level (Level 5), before security
Singapore AirlinesSMain Terminal ticketing level (Level 5), before security
Southwest AirlinesBMain Terminal ticketing level (Level 5), before security
STARLUX AirlinesSMain Terminal ticketing level (Level 5), before security
Sun Country AirlinesMain TerminalMain Terminal ticketing level (Level 5), before security
Turkish AirlinesSMain Terminal ticketing level (Level 5), before security
United AirlinesBMain Terminal ticketing level (Level 5), before security
Virgin AtlanticSMain Terminal ticketing level (Level 5), before security
VolarisSMain Terminal ticketing level (Level 5), before security
WestJetA / BMain Terminal ticketing level (Level 5), before security

Security checkpoints

  1. Checkpoint 1TSA PreCheck

    Published hours
    4 a.m. to 8 p.m.

  2. Checkpoint 2TSA PreCheck

    Published hours
    4 a.m. to 4 p.m.

  3. Checkpoint 3TSA PreCheck

    Published hours
    4 a.m. to 11:30 p.m.; TSA PreCheck and Touchless ID 4 a.m. to 8 p.m.

  4. Checkpoint 4

    Published hours
    Open 24 hours

  5. Checkpoint 5TSA PreCheck

    Published hours
    4 a.m. to 8 p.m.

  6. Checkpoint 6TSA PreCheck

    Published hours
    4 a.m. to 10 p.m.

  7. IAF Transfers Security Checkpoint

    Published hours
    6 a.m. to 9:45 p.m. Pacific
All checkpoints and what the airport publishes

Lounges

1 further entry is listed as closed, restricted or not a lounge; see the lounge list.

Food & shops in Main Terminal

Browse 116 directory listings recorded under Main Terminal. Individual pages show the available location and opening-hour information. Check the security-side field before choosing a place for your journey.

Some listings identify only the terminal, not a specific gate or concourse. They are not plotted as exact locations on the map.

Browse places in Main Terminal

Questions about Main Terminal

What airlines are in Main Terminal?

37 airlines are listed Main Terminal: Aer Lingus, AeroMexico, Air Canada, Air France, Alaska Airlines, AMC (Air Mobility Command), American Airlines, ANA (All Nippon Airways), and 29 more.

See every airline in the table.

What restaurants are in Main Terminal?

The airport's directory lists 58 restaurants in Main Terminal: Africa Lounge, BAD EGG Breakfast Bar, Ballard Brew Hall, Bambuza Vietnam Kitchen & Bar, Beecher's Handmade Cheese, BrewTop Social, and 52 more.

Browse places in Main Terminal.

Which concourses and gates are in Main Terminal?

Main Terminal has 6 concourses:

  • A Concourse
  • B Concourse
  • C Concourse
  • D Concourse
  • N Concourse
  • S Concourse

Continue planning

Good to know

  • A, B, C and D Concourses connect, so you can walk between them. The N and S Gates do not: you reach them on the SEA Underground.
  • SEA Underground trains come every three minutes on both loops, and they run inside security, so you do not screen again to change gates.

Source: Seattle-Tacoma International Airport

Visual field guide

A traveler watching a taxiing aircraft from the covered Lookout at C
The Lookout at C · Level 3