Washington to St Louis
IADSTL
Fly from Washington to St Louis starting at USD 62 with F9.
Best fare available on Jun 23, 2026.
Limited seats. Better plans. Book before it's gone.
Washington to St Louis cheapest flights this week
20 May
F9
18:27IAD
17:15STL
1 Stop$69VIEW DEAL
6 Jun
F9
13:26IAD
20:31STL
1 Stop$90VIEW DEAL
19 Jun
F9
07:30IAD
09:52STL
1 Stop$132VIEW DEAL
20 Jun
UA
08:15IAD
13:07STL
1 Stop$147VIEW DEAL
23 Jun
F9
20:57IAD
09:52STL
1 Stop$62VIEW DEAL
24 Jun
F9
20:57IAD
18:30STL
1 Stop$114VIEW DEAL
25 Jun
UA
06:10IAD
13:11STL
1 Stop$167VIEW DEAL
Washington to St Louis monthly flight fare trend
May
from USD 69
Jun
from USD 62
Jul
No flights
Aug
No flights
Sep
No flights
Oct
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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