Washington to St Louis

IADSTL

Fly from Washington to St Louis starting at USD 256 with Frontier Airlines.Best fare available on Jul 3, 2026.Limited seats. Better plans. Book before it's gone.

Washington to St Louis cheapest flights this week

3 Jul
11:17IAD
19:53STL
2 StopUSD 256VIEW DEAL
9 Jul
09:00IAD
11:27STL
DirectUSD 285VIEW DEAL

Washington to St Louis monthly flight fare trend

Jul
from USD 256
Aug
No flights
Sep
No flights
Oct
No flights
Nov
No flights
Dec
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