Flight Routes from Chicago to St. Louis

Trip type

Our cheapest offers for flights from Chicago to St. Louis

Here you can compare cheap flights from Chicago (CHI) to St. Louis (STL) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to St. Louis. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Best option
Chicago
St. Louis
Outbound
03/28/26
direct
AA3712
01h 23min
Return
04/25/26
direct
AA2444
01h 27min
American Airlines ?
$183
Chicago
St. Louis
Outbound
07/26/26
direct
AA4104
01h 26min
Return
08/05/26
direct
AA1926
01h 24min
American Airlines ?
$210
Chicago
St. Louis
Outbound
03/28/26
direct
AA3573
01h 25min
Return
04/25/26
direct
AA4337
01h 29min
American Airlines ?
$249
Chicago
St. Louis
Outbound
05/16/26
direct
UA4464
01h 26min
Return
05/29/26
direct
UA0533
01h 31min
United Airlines ?
$263
Chicago
St. Louis
Outbound
03/28/26
direct
AA3573
01h 25min
Return
04/25/26
direct
AA4135
01h 30min
American Airlines ?
$311
Chicago
St. Louis
Outbound
03/28/26
1 Stopover (ATL)
F92198, F94473
17h 40min
Return
04/25/26
1 Stopover (DEN)
F94567, F93174
13h 38min
Frontier Airlines ?
$345
Chicago
St. Louis
Outbound
07/26/26
1 Stopover (DFW)
F91341, F91524
12h 07min
Return
08/05/26
1 Stopover (ATL)
F94474, F93397
06h 49min
Frontier Airlines
$438
Chicago
St. Louis
Outbound
07/26/26
1 Stopover (ATL)
F91596, F94473
25h 17min
Return
08/05/26
2 Stopovers (DEN, MSP)
F94567, SY0652, SY0261
23h 51min
Frontier Airlines ?
$456
Chicago
St. Louis
Outbound
06/25/26
direct
AA6352
01h 28min
Return
06/30/26
direct
AA4537
01h 44min
American Airlines ?
$473
found 2 days ago
Chicago
St. Louis
Outbound
06/25/26
2 Stopovers (IAH, DEN)
F93135, F93205, F93302
27h 34min
Return
06/30/26
1 Stopover (ATL)
F94474, F91441
22h 12min
Frontier Airlines ?
$487
found 2 days ago
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Chicago to St. Louis

Favorite airline: Southern Airways Express
52 % of flights from Chicago to St. Louis are booked with Southern Airways Express.
Southern Airways Express
52 %
United Airlines
22 %
Spirit Airlines
11 %
Direct flights are cheaper
On this route, direct flights are $77.00 cheaper than flights with a stopover.
non stop flight
1 stop
01h 27min
19h 20min
$ 86
$ 163
Favourite connection: via Quincy
Stopover flights on this route are especially popular via Quincy, making up 51 % of bookings.
Route
bookings
1 stopover Quincy, IL
11h 15min, from $ 169
51 %
Direct flights
01h 27min, from $ 86
29 %
1 stopover Fort Lauderdale-Hollywood International Airport, FL
11h 42min, from $ 264
8 %

Important flight information

Flight information: Chicago - St. Louis

Roundtrip from $ 182,78
Flight duration min. 01:05 / max. 08:55
Return flight duration min. 01:00/ max. 12:10
Distance 419 km
Flights per week 203
Departure airport Airport Chicago-IL, all airports (CHI)
Arrival airport Airport St. Louis - Lambert International Airport (STL)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to St. Louis
Flight destinations with a similar price
Flight destinations with a similar price