St Louis to Washington
STLIAD
Fly from St Louis to Washington starting at USD 62 with F9.
Best fare available on Jun 23, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Washington cheapest flights this week
20 Apr
AA
14:12STL
--:--IAD
1 Stop$345VIEW DEAL
24 Apr
F9
16:59STL
--:--IAD
1 Stop$117VIEW DEAL
28 Apr
UA
06:30STL
--:--IAD
1 Stop$254VIEW DEAL
29 Apr
F9
16:59STL
--:--IAD
1 Stop$96VIEW DEAL
30 Apr
F9
11:21STL
--:--IAD
1 Stop$90VIEW DEAL
1 May
F9
20:23STL
--:--IAD
1 Stop$154VIEW DEAL
6 Jun
F9
17:27STL
--:--IAD
1 Stop$90VIEW DEAL
23 Jun
F9
18:31STL
--:--IAD
1 Stop$62VIEW DEAL
25 Jun
F9
18:31STL
--:--IAD
1 Stop$114VIEW DEAL
St Louis to Washington monthly flight fare trend
Apr
from USD 90
May
from USD 154
Jun
from USD 62
Jul
No flights
Aug
No flights
Sep
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
