St Louis to Seattle
STLSEA
Fly from St Louis to Seattle starting at USD 164 with UA.
Best fare available on Jul 10, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Seattle cheapest flights this week
25 May
AA
05:14STL
14:10SEA
1 Stop$180VIEW DEAL
10 Jul
UA
19:23STL
03:20SEA
1 Stop$164VIEW DEAL
St Louis to Seattle monthly flight fare trend
May
from USD 180
Jun
No flights
Jul
from USD 164
Aug
No flights
Sep
No flights
Oct
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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