St Louis to Washington
STLIAD
Fly from St Louis to Washington starting at USD 175 with Frontier Airlines.
Best fare available on Sep 8, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Washington cheapest flights this week
St Louis to Washington monthly flight fare trend
Sep
from USD 175
Oct
No flights
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
Washington
Washington Dulles International Airport (IAD)
Dulles, IAD
Zone
New York
Elev
312 ft
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