St Louis to Seattle
STLSEA
Fly from St Louis to Seattle starting at SAR 677 with Frontier Airlines.
Best fare available on Sep 10, 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
Aug
No flights
Sep
from SAR 677
Oct
No flights
Nov
No flights
Dec
No flights
Jan
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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