Seattle · SEA · Question
What Airlines Fly Out of SEA? Complete Airline List
Expert answer updated for 2026, with official sources and links to detailed guides.
Seattle-Tacoma International Airport (SEA) is served by 12+ airlines, offering flights to domestic and international destinations. SEA is a hub airport for Alaska Airlines, which means extensive route networks and frequent flights from these carriers.
All Airlines at SEA
- Alaska Airlines
- Delta Air Lines
- American Airlines
- United Airlines
- Southwest Airlines
- JetBlue
- Spirit Airlines
- Frontier Airlines
- Hawaiian Airlines
- British Airways
- Emirates
- Korean Air
Which Terminal Is Each Airline At?
Airlines at SEA are spread across 5 terminal areas. To find exactly which terminal, gates, and TSA checkpoint your airline uses, use our Terminal Finder tool — just select SEA and your airline for instant results.
You can also see the full terminal-by-terminal breakdown in our SEA airline directory, which includes gate ranges and hub badges.
Hub Airlines at SEA
Alaska Airlines uses SEA as a hub, operating the most flights and typically occupying dedicated terminal space. Hub passengers benefit from more flight options, better lounge access, and stronger frequent flyer earning at their hub airport.
For detailed guides on individual airlines including baggage fees, loyalty programs, and check-in tips, visit our airline directory.