Terminals
Terminals at Seattle-Tacoma International Airport: terminals, gates and the airport layout.
More in our guide: How early to arrive at Seattle airport: 2 hours, or 3 for international.
Find your way around SEA
Each outline is drawn to scale. The distance between the buildings is shortened to fit.
- Terminal building
- Concourse
Main Terminal
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.
Before and after security
A Concourse
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
B Concourse
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
C Concourse
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
D Concourse
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
N Concourse
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
S Concourse
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
Every concourse and building
- A ConcourseAirside, with Gates A1–A14, A20 and A21 on the map; A Station, across from Gate A3, serves the Blue and Yellow Lines.
- B ConcourseAirside, 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.
- C ConcourseAirside, 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.
- D ConcourseAirside, 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.
- N ConcourseAirside satellite with Gates N1–N20, reached by the Green Line at N Station below the concourse, or by bus during train outages.
- S ConcourseAirside 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.