St Louis to Washington

STLIAD

Fly from St Louis to Washington starting at USD 66 with Frontier Airlines.Best fare available on Oct 14, 2026.Limited seats. Better plans. Book before it's gone.

St Louis to Washington cheapest flights this week

30 Sept
Frontier Airlines
14:29STL
23:10IAD
1 StopUSD 211VIEW DEAL
1 Oct
Frontier Airlines
18:39STL
09:17IAD
1 StopUSD 208VIEW DEAL
3 Oct
Frontier Airlines
12:17STL
05:20IAD
1 StopUSD 181VIEW DEAL
8 Oct
Frontier Airlines
16:30STL
09:17IAD
1 StopUSD 187VIEW DEAL
14 Oct
Frontier Airlines
18:35STL
16:13IAD
1 StopUSD 66VIEW DEAL

St Louis to Washington monthly flight fare trend

Sep
from USD 211
Oct
from USD 66
Nov
No flights
Dec
No flights
Jan
No flights
Feb
No flights

Airport Details

Origin

St Louis

St. Louis Lambert International Airport (STL)

St Louis, STL
Zone

Chicago

Elev

618 ft

Destination

Washington

Washington Dulles International Airport (IAD)

Dulles, IAD
Zone

New York

Elev

312 ft

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