Chicago to St Louis

MDWSTL

Fly from Chicago to St Louis starting at USD 60 with Southwest Airlines.Best fare available on Sep 8, 2026.Limited seats. Better plans. Book before it's gone.

Chicago to St Louis cheapest flights this week

23 Jul
Frontier Airlines
12:11MDW
17:37STL
1 StopUSD 185VIEW DEAL
27 Jul
Frontier Airlines
06:05MDW
17:37STL
1 StopUSD 242VIEW DEAL
11 Aug
Southwest Airlines
14:00MDW
15:10STL
DirectUSD 100VIEW DEAL
16 Aug
Frontier Airlines
06:05MDW
08:57STL
1 StopUSD 125VIEW DEAL
22 Aug
Southwest Airlines
09:55MDW
11:05STL
DirectUSD 181VIEW DEAL
27 Aug
Frontier Airlines
06:05MDW
17:22STL
1 StopUSD 90VIEW DEAL
8 Sept
Southwest Airlines
20:30MDW
21:40STL
DirectUSD 60VIEW DEAL
8 Sept
Southwest Airlines
14:00MDW
15:10STL
DirectUSD 106VIEW DEAL

Chicago to St Louis monthly flight fare trend

Jul
from USD 185
Aug
from USD 90
Sep
from USD 60
Oct
No flights
Nov
No flights
Dec
No flights

Airport Details

Origin

Chicago

Chicago Midway International Airport (MDW)

Chicago, MDW
Zone

Chicago

Elev

620 ft

Destination

St Louis

St. Louis Lambert International Airport (STL)

St Louis, STL
Zone

Chicago

Elev

618 ft

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