Washington to St Louis
IADSTL
Fly from Washington to St Louis starting at SAR 274 with Frontier Airlines.
Best fare available on Oct 15, 2026.
Limited seats. Better plans. Book before it's gone.
Washington to St Louis cheapest flights this week
Washington to St Louis monthly flight fare trend
Sep
No flights
Oct
from SAR 274
Nov
No flights
Dec
from SAR 385
Jan
No flights
Feb
No flights
Airport Details
Origin
Washington
Washington Dulles International Airport (IAD)
Dulles, IAD
Zone
New York
Elev
312 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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