Washington to St Louis

IADSTL

Fly from Washington to St Louis starting at USD 62 with Frontier Airlines.Best fare available on Jun 23, 2026.Limited seats. Better plans. Book before it's gone.

Washington to St Louis cheapest flights this week

6 Jun
Frontier Airlines
13:26IAD
20:31STL
1 Stop$90VIEW DEAL
19 Jun
Frontier Airlines
07:30IAD
09:52STL
1 Stop$132VIEW DEAL
20 Jun
United Airlines
08:15IAD
13:07STL
1 Stop$147VIEW DEAL
23 Jun
Frontier Airlines
20:57IAD
09:52STL
1 Stop$62VIEW DEAL
24 Jun
Frontier Airlines
20:57IAD
18:30STL
1 Stop$114VIEW DEAL
25 Jun
United Airlines
06:10IAD
13:11STL
1 Stop$167VIEW DEAL

Washington to St Louis monthly flight fare trend

May
from USD 69
Jun
from USD 62
Jul
No flights
Aug
No flights
Sep
No flights
Oct
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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