Seattle to St Louis
SEASTL
Fly from Seattle to St Louis starting at USD 160 with United Airlines.
Best fare available on Sep 7, 2026.
Limited seats. Better plans. Book before it's gone.
Seattle to St Louis cheapest flights this week
Seattle to St Louis monthly flight fare trend
Jul
from USD 194
Aug
No flights
Sep
from USD 160
Oct
No flights
Nov
No flights
Dec
No flights
Airport Details
Origin
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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