6 Things to Know Before Using an Airport Lounge at SEA
Seattle-Tacoma International Airport (SEA) is a principal hub in the Pacific Northwest, serving as an operation for both Alaska Airlines and Delta Air Lines. SEA features airport lounges, led by the American Express Centurion Lounge in the Central Terminal, multiple Delta Sky Clubs, and Alaska Lounges. All concourses and satellite terminals are connected post-security by an underground train system.
Quick Answer
- Subterranean Train Airside Access: Concourses A, B, C, D and the North and South Satellites are linked post-security by the automated SEA Underground train system.
- Centurion Lounge in Central Terminal: Located on the mezzanine level of the Central Terminal (above the central food court), featuring full barista coffee service and tarmac views.
- Delta Sky Clubs & Delta One Lounge: Delta operates Sky Clubs in Concourse A (near Gate A1 and near Gate A11) and a Delta One Lounge near Gate A11.
- Alaska Lounges: Alaska operates lounges in Concourse C (near C16A), Concourse D (near D1), and North Satellite (mezzanine above N15).
- The Club at SEA: Priority Pass members access The Club at SEA in Concourse A (near A12) and South Satellite (above S10).
1. Airport Layout & SEA Underground Train System
SEA consists of a main terminal building divided into four concourses (A, B, C, D) and two satellite terminals: North Satellite (N Gates) and South Satellite (S Gates).
The SEA Underground train system operates three post-security loops:
- North Loop: Connects Concourses C, D, and North Satellite (N Gates).
- South Loop: Connects Concourses A, B, and South Satellite (S Gates).
- Shuttle Train: Connects Concourse A to Concourse D.
The SEA Underground connects the concourses and satellite gates post-security, but allow extra time to travel to a lounge outside your departure area.
2. Complete SEA Lounge Directory & Access Rules
Understanding which lounge matches your ticket, credit card, or departure gate ensures a smooth layover.
| Location | Lounge Name | Primary Access Credentials | Guest Policies & Important Rules |
|---|---|---|---|
| Central Terminal | Amex Centurion Lounge | Amex Platinum Card®, Business Platinum, Centurion | Mezzanine level. $50 per adult ($30 ages 2–17) unless $75k spend met. Guests must share same flight. 3h departure / 5h connection limit. |
| Concourse A (A11) | Delta Sky Club | Delta One ticket, Delta SkyMiles® Reserve, Amex Platinum (flying Delta) | Reserve: 15 Visits per Medallion Year; Platinum: 10 Visits per Medallion Year. Delta Main Basic fares excluded. Located near Gate A11. |
| Concourse A (A1) | Delta Sky Club | Delta One ticket, eligible Delta credit cardholders | Located near Gate A1. Same Medallion Year visit limits apply. |
| Concourse A (A11) | Delta One Lounge | Delta One ticket holders | Exclusive space near Gate A11 for Delta One passengers. |
| North Satellite (N15) | Alaska Lounge | Alaska Lounge Membership, Oneworld status, First Class ticket (1,100+ miles) | Mezzanine level above Gate N15. Offers views, barista coffee, and local beverages. |
| Concourse C & D | Alaska Lounges | Alaska Lounge Membership, Oneworld status, qualifying First Class | Locations near Gate C16A and Gate D1. |
| Concourse A (A12) | The Club at SEA | Priority Pass, LoungeKey, Day Pass ($50) | Located near Gate A12 serving domestic departures. |
| South Satellite (S10) | The Club at SEA | Priority Pass, LoungeKey, Day Pass ($50) | Mezzanine level above Gate S10 serving international departures. |
3. The Amex Centurion Lounge in Central Terminal
Located on the mezzanine level of the Central Terminal (accessible via elevator or stairs behind the central food court), the SEA Centurion Lounge spans 28,000 square feet.
Key Amenities & Eligibility
- Amenities: Full-service barista coffee bar, buffet dining featuring Pacific Northwest ingredients, and tarmac views.
- Same-Flight Guest Rule: All guests must be ticketed on the exact same flight as the Card Member.
- Timing Window: Originating flight entry within 3 hours of departure; connecting flight entry permitted up to 5 hours before departure.
4. Delta Sky Clubs & Alaska Lounges Network
As a hub for both Delta and Alaska Airlines, SEA houses multiple carrier lounges:
- Delta Sky Club (Concourse A near Gate A11): Spans 21,000 square feet featuring floor-to-ceiling glass, private phone booths, and gas fireplaces.
- Alaska Lounge (North Satellite near Gate N15): The primary Alaska Airlines lounge at SEA, offering 360-degree views of airport operations, Washington wines, craft beers on tap, and custom barista coffee.
5. Priority Pass Access: The Club at SEA Locations
Priority Pass members have options at SEA:
- The Club at SEA (Concourse A near Gate A12): Convenient for domestic departures in Concourses A and B.
- The Club at SEA (South Satellite near Gate S10): Located on the mezzanine level of the South Satellite, serving international departure flights.
6. Before You Use an Airport Lounge at SEA Checklist
- Check Central Terminal elevator location: Take the elevator behind the Central Terminal food court to reach the Centurion Lounge.
- Use the SEA Underground train: Ride the train loop to reach satellite lounges, allowing extra travel time.
- Confirm Alaska Airlines ticket distance: Alaska First Class passengers qualify for lounge entry on flights over 1,100 miles.
- Verify Centurion same-flight guest rule: Guests must share your exact flight itinerary.
- Bring physical cards ready: Required alongside your boarding pass at check-in.
FAQ
Can I access the Centurion Lounge if my flight departs from the North Satellite (N Gates)?
Yes. Take the North Loop train from the N Gates to Concourse C, walk to the Central Terminal mezzanine Centurion Lounge, and take the train back to the N Gates before boarding.
Does Priority Pass work at Alaska Lounges at SEA?
No. Alaska Lounges do not participate in Priority Pass. Priority Pass members at SEA use The Club at SEA in Concourse A or South Satellite.
Are the North and South Satellites connected post-security?
Yes. The SEA Underground train links all concourses and both satellites airside inside security.
The Bottom Line
Seattle-Tacoma International Airport makes lounge access simple thanks to post-security train connectivity. Head to the Central Terminal mezzanine for the Amex Centurion Lounge, or visit the North Satellite for Alaska’s top lounge experience, allowing extra time to ride the train back to your gate.
Sources
- Port of Seattle Airport Directory: Seattle-Tacoma International Airport Lounges
- Amex Centurion Network Terms: Amex Centurion Lounge SEA
- Alaska Airlines Lounge Network: Alaska Lounge Locations
- Delta Air Lines Lounge Locations: Delta Sky Club Access Terms
- Priority Pass Network Directory: Priority Pass SEA Lounges