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Southwest · Seattle–Tacoma International Airport · SEA

Southwest nonstop flights from Seattle

12 nonstop destinations on Southwest out of SEA — 4% of everything that departs. Zero layovers, zero connections.

12
Nonstop cities
4%
of SEA departures
174
Flights / week
SEA
Your origin

Where Southwest can take you

Dashed arcs = Southwest nonstop routes from SEA · updates with the day filter
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All nonstop destinations from Seattle (SEA) every airline, not just Southwest

Everywhere Southwest flies 121 airports

Where can you fly nonstop on Southwest from Seattle (SEA)?

Southwest flies 12 nonstop routes from Seattle–Tacoma International Airport (SEA), around 174 departures a week — 4% of everything leaving SEA.

Its busiest is Seattle to Denver at 27 Southwest flights a week. 3 of these 12 destinations have no other nonstop operator from SEA, so Southwest is the only way to reach them without a connection.

Use the day filter above to see which Southwest routes fly on the day you want to travel. Route data updated November 2026 from observed departures.

Frequencies shown are Southwest's own departures, counted from observed schedules. Schedules change — always confirm with the airline before booking.