Washington to St Louis

IADSTL

Fly from Washington to St Louis starting at USD 74 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

9 Oct
Frontier Airlines
07:50IAD
18:40STL
1 StopUSD 187VIEW DEAL
11 Oct
Frontier Airlines
06:00IAD
13:35STL
1 StopUSD 190VIEW DEAL
13 Oct
United Airlines
17:55IAD
20:21STL
DirectUSD 259VIEW DEAL
14 Oct
Frontier Airlines
07:50IAD
18:40STL
1 StopUSD 181VIEW DEAL
15 Oct
Frontier Airlines
21:06IAD
18:40STL
1 StopUSD 74VIEW DEAL
15 Oct
Frontier Airlines
06:00IAD
13:35STL
1 StopUSD 198VIEW DEAL
17 Oct
Frontier Airlines
11:12IAD
00:13STL
1 StopUSD 182VIEW DEAL
28 Nov
United Airlines
06:11IAD
11:37STL
1 StopUSD 237VIEW DEAL
1 Dec
Frontier Airlines
22:54IAD
08:09STL
1 StopUSD 104VIEW DEAL

Washington to St Louis monthly flight fare trend

Oct
from USD 74
Nov
from USD 237
Dec
from USD 104
Jan
No flights
Feb
No flights
Mar
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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