Washington to St Louis

IADSTL

Fly from Washington to St Louis starting at USD 146 with Frontier Airlines.Best fare available on Sep 9, 2026.Limited seats. Better plans. Book before it's gone.

Washington to St Louis cheapest flights this week

3 Sept
Frontier Airlines
08:59IAD
18:50STL
1 StopUSD 179VIEW DEAL
4 Sept
Frontier Airlines
16:52IAD
17:11STL
1 StopUSD 172VIEW DEAL
5 Sept
Frontier Airlines
08:59IAD
18:50STL
1 StopUSD 147VIEW DEAL
6 Sept
Frontier Airlines
06:20IAD
18:22STL
1 StopUSD 148VIEW DEAL
7 Sept
Frontier Airlines
06:20IAD
18:22STL
1 StopUSD 171VIEW DEAL
9 Sept
Frontier Airlines
07:50IAD
14:10STL
1 StopUSD 146VIEW DEAL
10 Sept
Frontier Airlines
11:12IAD
18:54STL
1 StopUSD 146VIEW DEAL
11 Sept
Frontier Airlines
07:50IAD
14:10STL
1 StopUSD 163VIEW DEAL
12 Sept
Frontier Airlines
06:00IAD
12:17STL
1 StopUSD 149VIEW DEAL

Washington to St Louis monthly flight fare trend

Sep
from USD 146
Oct
No flights
Nov
No flights
Dec
No flights
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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