Amenities, from 14 metrics
Concourse B at Seattle-Tacoma International (SEA) has 1 lounge. Served by Delta Air Lines, Frontier Airlines, Southwest Airlines, United Airlines, WestJet.
- Lounges
- 1 open
- Best rated
- The Centurion Lounge
- Airlines
- 5
- Details checked
Lounges
Details checked as recently as .
Best-rated lounge in Concourse B
The Centurion Lounge4.6
Amenity ratings
Security speed, bag delivery, the walk to your gate, and the rest of terminal life, each scored 1–5.
What a 5 means for each metric
- Security speed
- through the checkpoint in minutes, even at peak
- Check-in & bag drop
- short lines, plenty of kiosks, quick bag drop
- Baggage delivery
- bags on the belt by the time you reach it
- Walk to gates
- short walks, moving walkways where it's long
- Signage & wayfinding
- clear signs, easy to find your gate
- Cleanliness
- spotless floors, restrooms, and seating
- Food & drink
- real restaurants and good coffee, not just kiosks
- Shopping
- useful shops, not only duty-free perfume
- Wi-Fi
- free, fast, no captive-portal hassle
- Gate seating
- comfortable seats with power at every gate
- Power outlets
- outlets and USB at most seats
- Quiet
- no blaring announcements or gate-area chaos
- Restrooms
- clean, plentiful, never a queue
- Accessibility
- step-free routes, help easy to find
Airlines served
Quick answers
How many lounges are in Concourse B at Seattle-Tacoma International?
Lounge Frog lists 1 lounge in Concourse B at Seattle-Tacoma International (SEA): The Centurion Lounge.
Which airlines fly from Concourse B at Seattle-Tacoma International?
Delta Air Lines, Frontier Airlines, Southwest Airlines, United Airlines and WestJet fly from Concourse B at Seattle-Tacoma International (SEA).
What is the best lounge in Concourse B?
The highest-rated lounge in Concourse B at Seattle-Tacoma International (SEA) on Lounge Frog is The Centurion Lounge, at 4.6 out of 5.
Is Concourse B a good terminal?
Lounge Frog rates Concourse B at SEA 3.9 out of 5 overall, the average of 14 editorial metrics such as security speed and bag delivery.
Traveller reviews
What people who've been say. One review each; you can update yours.
News
News about SEA Concourse B
- Ranking
The 10 best lounges at Seattle-Tacoma International in 2026
Sea-Tac's ten best lounges ranked by overall rating, from Delta's Concourse A flagship to the Priority Pass rooms in the satellites.
- Roundup
Skip the Centurion and Expense a Restaurant? Sometimes That's the Better Perk
When work covers a reasonable meal and the lounge has a long wait, chasing the benefit can become the least sensible part of the trip.
- Roundup
Seattle delays its vote on Chase's planned 16,000 sq ft Sapphire Lounge to October 27
Port of Seattle commissioners want answers on equity and terminal spending before approving a $70 million card lounge next to Delta's on the A Concourse. Even with a yes, it is years away.
- Roundup
Four of the best airport lounges for coffee
Barista service, dedicated coffee bars and a local roaster: four lounges worth knowing if a good cup matters before your flight.
- Roundup
Is Amex Platinum still worth it for lounges? A crowding reality check
Value the lounge visits you actually complete—not the network size on the brochure or the retail price of benefits you never use.
- Ranking
Every Amex Centurion Lounge, ranked: 2026
DFW's Centurion Lounge is the best in the network at 4.9; Melbourne, Atlanta, Denver, Philadelphia and Heathrow follow at 4.8.
NewsU.S. Centurion Lounges ranked by showers: DFW and Miami lead with four
Dallas/Fort Worth and Miami have four shower suites each. LaGuardia and temporary SFO have none. Full ranking from Lounge Frog lounge records.
NewsAlaska grows Paine Field seats 50%, adding San Jose and more Los Angeles and Portland flights
Alaska Airlines will add twice-daily Everett–San Jose flights from April 14, 2027, and grow Los Angeles and Portland to two daily flights. Lounge Frog lists no lounges at Paine Field; Sea-Tac has 12, including three Alaska Lounges.