Flights from Chicago to St. Louis

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
11/09/25
direct
UA2618
01h 26min
Return
12/07/25
direct
UA1641
01h 23min
United Airlines ?
$192
Chicago
St. Louis
Please note: transfer for connecting flight
Outbound
11/09/25
2 Stopovers (BNA, JBR)
NK0416, 9X0459, 9X0454
26h 35min
Return
12/07/25
1 Stopover (FLL)
NK2158, NK1986
21h 03min
Spirit Airlines, Southern Airways Express
$281
Chicago
St. Louis
Outbound
11/09/25
direct
UA4416
01h 34min
Return
12/07/25
direct
UA3598
01h 30min
United Airlines
$201
Chicago
St. Louis
Outbound
11/09/25
1 Stopover (ATL)
F91596, F94473
05h 11min
Return
12/07/25
1 Stopover (ATL)
F94474, F93397
05h 42min
Frontier Airlines
$206
Chicago
St. Louis
Outbound
11/09/25
1 Stopover (DEN)
F91483, F93302
27h 07min
Return
12/07/25
1 Stopover (MCO)
F92636, F92791
25h 33min
Frontier Airlines ?
$229
Chicago
St. Louis
Outbound
02/13/26
direct
AA1926
01h 19min
Return
02/26/26
direct
AA1699
01h 21min
American Airlines ?
$233
Chicago
St. Louis
Outbound
11/09/25
direct
UA4613
01h 31min
Return
12/07/25
direct
AA4605
01h 40min
United Airlines ?
$245
Chicago
St. Louis
Outbound
02/13/26
direct
UA4491
01h 31min
Return
02/26/26
direct
UA2267
01h 29min
United Airlines ?
$295
Chicago
St. Louis
Outbound
02/13/26
direct
AA1926
01h 19min
Return
02/26/26
direct
AA1699
01h 21min
American Airlines ?
$395
Chicago
St. Louis
Outbound
02/13/26
1 Stopover (MCO)
F93044, F92635
15h 33min
Return
02/26/26
1 Stopover (MCO)
F92636, F93043
21h 08min
Frontier Airlines
$503
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 191,77 $
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