St Louis to Chicago

STLMDW

Fly from St Louis to Chicago starting at USD 86 with Frontier Airlines.Best fare available on Jun 15, 2026.Limited seats. Better plans. Book before it's gone.

St Louis to Chicago cheapest flights this week

1 Jun
Frontier Airlines
21:21STL
11:09MDW
2 Stop$209VIEW DEAL
2 Jun
Frontier Airlines
18:51STL
11:09MDW
2 Stop$168VIEW DEAL
15 Jun
Frontier Airlines
17:06STL
22:11MDW
1 Stop$86VIEW DEAL
20 Jun
Frontier Airlines
17:06STL
11:12MDW
1 Stop$124VIEW DEAL

St Louis to Chicago monthly flight fare trend

May
from USD 160
Jun
from USD 86
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights

Airport Details

Origin

St Louis

St. Louis Lambert International Airport (STL)

St Louis, STL
Zone

Chicago

Elev

618 ft

Destination

Chicago

Chicago Midway International Airport (MDW)

Chicago, MDW
Zone

Chicago

Elev

620 ft

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