Yes, you can smoke at Seattle-Tacoma International Airport (SEA), in four designated outdoor areas, all located before the security checkpoint: outside Doors 5 and 33 on the ticketing level of the Main Terminal, outside Door 00 at baggage claim, and on Level 1 of the parking garage. The terminal and all concourses are smoke-free.
In the news (June 2026): Sea-Tac’s expanded C Concourse opened for the World Cup — its new lookout and airfield-view space are smoke-free, so the outdoor areas by the Main Terminal doors remain your spot.
How SEA Is Laid Out
Understanding SEA’s layout is important because the airport is large and getting back through security takes time. The Main Terminal building sits at the center, handling ticketing, check-in, and baggage claim. From there, six concourses branch out:
- Concourse A extends south from the main terminal
- Concourse B extends south, parallel to A
- Concourse C extends north from the main terminal
- Concourse D extends north, parallel to C
- N Concourse (N gates), the building the airport used to call the North Satellite, is a separate structure reached by the SEA Underground train
- S Concourse (S gates), formerly the South Satellite, is likewise a separate building on the SEA Underground
All six are past TSA security. There is no way to reach them without clearing the checkpoint.
Main Terminal
The Main Terminal is where you check in, drop bags, clear security, and collect luggage on arrival. This is the only building where you have access to the outdoors without going through security. Three of the four designated smoking areas are outside its doors: two on the ticketing level (the upper drive) and one at baggage claim (the lower drive). The fourth is on Level 1 of the parking garage.
Smoking areas: Door 5 and Door 33 on the ticketing level, Door 00 at baggage claim, and Level 1 of the parking garage. These are the only places at all of SEA where you can legally smoke.
Concourse A
Concourse A runs south from the main terminal and is Delta Air Lines territory, shared with WestJet. It has several dining options and a lounge.
Smoking areas: Outdoors only, before security. Concourse A has no outdoor patios, balconies, or designated areas of its own.
Concourse B
Concourse B sits south of the main terminal alongside Concourse A and is the busiest mix at SEA: Delta and WestJet share it with Frontier, Southwest and United.
Smoking areas: Outdoors only, before security. Concourse B is smoke-free throughout.
Concourse C
Concourse C extends north from the main terminal and is an Alaska Airlines concourse. It reopened in June 2026 after a rebuild that took it from one floor to four, adding a raft of dining, a large Alaska Lounge and the glass-walled Lookout at C airfield-viewing space.
Smoking areas: Outdoors only, before security. Nothing in the rebuilt concourse — the Lookout included — is a smoking area.
Concourse D
Concourse D runs north alongside Concourse C and is shared by Alaska Airlines and American Airlines, with a set of bus-boarded gates in an annex at the far end.
Smoking areas: Outdoors only, before security. Concourse D is smoke-free throughout.
N Concourse (N Gates)
The N Concourse is a separate structure reached by the SEA Underground train from the main terminal, and it is Alaska Airlines’ 20-gate home at SEA. The train ride takes about two minutes each way.
Smoking areas: Outdoors only, before security. The N Concourse is completely enclosed, with no outdoor access from the building. If your gate is here, a smoke break means taking the train back to the main terminal, exiting security, walking out to one of the designated areas, smoking, and clearing TSA again — easily an hour round trip.
S Concourse (S Gates)
The S Concourse, formerly the South Satellite, is the other separate building on the SEA Underground, and it is the airport’s long-haul international gateway: Emirates, British Airways, ANA, Japan Airlines, Korean Air, Cathay Pacific, EVA Air, Lufthansa, Air France, Qatar Airways, Singapore Airlines, Turkish Airlines and Virgin Atlantic all use it, alongside Hawaiian, JetBlue and Volaris. Like the N Concourse, the train takes about two minutes.
Smoking areas: Outdoors only, before security. The S Concourse has no outdoor access and is smoke-free throughout, so the same exit-and-return trip applies. Arriving international passengers come out at baggage claim, which puts the Door 00 area a short walk away.
Outdoor Smoking Areas
The airport’s own map lists four designated smoking areas at SEA, all outdoors and before security. Look for the smoking-area signage at each one:
- Door 5 — Ticketing level of the Main Terminal, on the upper drive. A last cigarette before you check in or head for the checkpoint.
- Door 33 — Also on the ticketing level of the Main Terminal, the second departures-level area.
- Door 00 — Baggage claim level of the Main Terminal, on the lower drive by the carousels. The convenient one if you have just landed and collected your bags.
- Parking garage, Level 1 — A designated area on the garage’s first level, handy if you are parking or meeting a ride there.
Those four are the whole list: the Port of Seattle keeps the upper and lower airport drives, the rest of the parking garage and every airfield location smoke-free apart from the designated areas.
Smoking During a Layover
The practical reality for smokers at Sea-Tac is that your cigarette is outside the Main Terminal or in the garage, before the checkpoint. That holds for all six concourses — there are no balconies, outdoor terraces, or ventilated smoking rooms past security.
If you exit for a smoke after clearing security, plan for the round trip to take 45 to 60 minutes in normal periods and longer at peak times in summer or around holidays, since you go through the full TSA screening process again. If your gate is in the N or S Concourse, add the SEA Underground ride and the walk to and from its stations on each leg.
Summary
| Area | Smoking Allowed | Details |
|---|---|---|
| Main Terminal (pre-security) | Outdoor only | Doors 5 and 33 (ticketing level), Door 00 (baggage claim) |
| Parking garage (pre-security) | Outdoor only | Designated area on Level 1 |
| Concourse A (Delta, WestJet) | None | Entirely smoke-free, no outdoor access |
| Concourse B (Delta, WestJet, Frontier, Southwest, United) | None | Entirely smoke-free, no outdoor access |
| Concourse C (Alaska) | None | Rebuilt 2026; Lookout at C is glass-walled and smoke-free |
| Concourse D (Alaska, American) | None | Entirely smoke-free, no outdoor access |
| N Concourse - N Gates (Alaska) | None | Separate building on the SEA Underground, no outdoor access |
| S Concourse - S Gates (long-haul international) | None | Separate building on the SEA Underground, no outdoor access |
| E-Cigarettes / Vaping | Outdoor only | Same rules as traditional cigarettes |
For USA airport smoking rules, state vape rules, lighter rules at TSA, and other federal/state info, see our USA smoking guide.