Washington to St Louis
IADSTL
Fly from Washington to St Louis starting at SAR 233 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
5 May
F9
11:07IAD
22:36STL
1 StopSAR 364VIEW DEAL
6 May
F9
18:27IAD
21:54STL
1 StopSAR 259VIEW DEAL
20 May
F9
18:27IAD
21:15STL
1 StopSAR 259VIEW DEAL
6 Jun
F9
13:26IAD
00:31STL
1 StopSAR 338VIEW DEAL
19 Jun
F9
07:30IAD
13:52STL
1 StopSAR 495VIEW DEAL
20 Jun
UA
08:15IAD
17:07STL
1 StopSAR 551VIEW DEAL
23 Jun
F9
20:57IAD
13:52STL
1 StopSAR 233VIEW DEAL
24 Jun
F9
20:57IAD
22:30STL
1 StopSAR 428VIEW DEAL
25 Jun
UA
06:10IAD
17:11STL
1 StopSAR 626VIEW DEAL
Washington to St Louis monthly flight fare trend
Apr
No flights
May
from SAR 259
Jun
from SAR 233
Jul
No flights
Aug
No flights
Sep
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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