St Louis to Seattle
STLSEA
Fly from St Louis to Seattle starting at USD 313 with Alaska Airlines.
Best fare available on Oct 1, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Seattle cheapest flights this week
St Louis to Seattle monthly flight fare trend
Sep
No flights
Oct
from USD 313
Nov
No flights
Dec
No flights
Jan
No flights
Feb
No flights
Airport Details
Origin
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
Destination
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
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