Which concourse does my airline use at Sea-Tac?

Concourse A: Delta. Concourse B: Mix (some Delta, some others). Concourse C + D: Alaska Airlines (mega-hub home). North Satellite: Alaska + some Delta. South Satellite: ALL international long-haul (BA, Lufthansa, KLM, Air France, Korean, ANA, JAL, Emirates, Qatar, Singapore, Asiana, Hainan, EVA Air, Aeroméxico, Icelandair). United / American / Southwest / JetBlue / Spirit / Frontier / Hawaiian use various concourses.

How do I get from Sea-Tac to downtown Seattle?

Link Light Rail — $3.00, 40 min direct to Westlake (downtown). Best option. Station at SEA connected by sky bridge. Runs every 6-15 min. Taxi $50 flat to downtown. Uber/Lyft $25-$45. The light rail connects to Seattle Center (Space Needle area) + Capitol Hill + University District.

How long do I need for a Seattle terminal transfer?

Main terminal concourses (A, B, C, D) are airside-connected — 10-25 min walk. To/from North Satellite: 3-min APM + walk. To/from South Satellite: 5-min APM + walk. Allow 75 min for any inter-concourse domestic connection, 90-120 min if reclearing security. International arrivals use the new IAF + walk back to main terminal.

Can I leave Sea-Tac during a layover?

Yes for US-eligible passport holders. Take the Link Light Rail to downtown (40 min). Allow 4-5 hours minimum round trip. Quick options: Pike Place Market (2-3h), Space Needle area (3h), Capitol Hill for food (90 min round). For shorter layovers, the airport has a full Sub Pop record shop + microbrewery.

How early should I arrive at SEA?

Domestic: 2 hours. International: 3 hours. SEA security can hit 45-90 min waits on Sunday evenings + Friday mornings + summer peak. Pre-Check + Clear both work. Alaska's Seattle-area MVP Gold members get priority security. Walking from Main Terminal to South Satellite takes 15-20 min plus APM — factor that into international connections.

SEAKSEA

Seattle-Tacoma International Airport

Seattle, United States · 52.6M (2024) passengers / year · 3 terminals

MAIN NSAT SSAT

At a glance

IATA / ICAO

SEA / KSEA

Passengers / year

52.6M (2024)

Terminal structure

Single main + 2 satellites (N + S)

Concourses

A · B · C · D + North + South satellites

Runways

3 parallel

Main hubs

Alaska Airlines + Delta Air Lines

Distance to downtown Seattle

22 km / 14 mi south

Terminals + flights

Tap a terminal to filter airlines, lounges and flights

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Terminals

MAINMain Terminal

Single terminal, multiple concourses (A, B, C, D)

Airlines (9)

Main terminal with concourses A, B, C, D + 2 satellites. Alaska's mega-hub at concourses C + D.

NSATNorth Satellite

Alaska + Delta domestic

Airlines (1)

Renovated 2021 — Alaska expanded its lounge here. Reached by underground APM (3 min).

SSATSouth Satellite

International + foreign carriers

Airlines (15)

International long-haul. Reached by separate APM from Main Terminal. New IAF (International Arrivals Facility) opened 2022.

Lounges

Alaska Lounge

MAIN

Alaska Lounge+ membership · Alaska MVP Gold + transcon

Multiple locations: Concourse C (largest), Concourse D, North Satellite.

Delta Sky Club

MAIN

Delta Sky Club membership

Concourse A — Delta's Seattle hub lounge.

United Club

MAIN

United Club membership

Centurion Lounge

MAIN

Amex Platinum / Centurion

AMEX flagship at SEA.

Club at SEA

SSAT

PriorityPass · Pay-per-use $50

British Airways Lounge

SSAT

BA Club + oneworld Sapphire

Mode	To	Cost	Time	Notes
Link Light Rail	Downtown Seattle (Westlake)	$3.00	40 min	Direct light rail. Station at SEA, connected by sky bridge.
King County Metro	Various Seattle districts	$2.75	60-90 min
Taxi (flat rate)	Downtown Seattle	$50 flat	25-50 min
Uber / Lyft	Downtown	$25-$45	25-50 min
Shuttle Express	Hotels + suburbs	$20-$45	40-90 min

Seattle-Tacoma International Airport

At a glance

Terminals + flights

Terminals

Lounges

To / from Seattle

SEA — Frequently asked

Other major airports