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

1 Oct
Frontier Airlines
11:12IAD
18:54STL
1 StopUSD 206VIEW DEAL
2 Oct
Frontier Airlines
07:50IAD
14:10STL
1 StopUSD 202VIEW DEAL
4 Oct
Frontier Airlines
06:00IAD
12:17STL
1 StopUSD 189VIEW DEAL
6 Oct
Frontier Airlines
06:00IAD
12:32STL
1 StopUSD 179VIEW DEAL
7 Oct
Frontier Airlines
07:50IAD
14:10STL
1 StopUSD 174VIEW DEAL
8 Oct
Frontier Airlines
11:12IAD
00:13STL
1 StopUSD 187VIEW DEAL
9 Oct
Frontier Airlines
07:50IAD
18:40STL
1 StopUSD 187VIEW DEAL
15 Oct
Frontier Airlines
21:06IAD
18:40STL
1 StopUSD 74VIEW DEAL
1 Dec
Frontier Airlines
22:54IAD
08:09STL
1 StopUSD 104VIEW DEAL

Washington to St Louis monthly flight fare trend

Sep
No flights
Oct
from USD 74
Nov
No flights
Dec
from USD 104
Jan
No flights
Feb
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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