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
Chicago
St. Louis
Outbound
10/10/25
1 Stopover (UIN)
9X0488, 9X0467
19h 40min
Return
11/04/25
1 Stopover (UIN)
9X0460, 9X0489
18h 37min
Southern Airways Express ?
$172
Best option
Chicago
St. Louis
Outbound
10/10/25
direct
AA4282
01h 34min
Return
11/04/25
direct
AA3461
01h 21min
American Airlines ?
$287
Chicago
St. Louis
Outbound
10/10/25
direct
AA4282
01h 34min
Return
11/04/25
direct
AA6308
01h 21min
American Airlines ?
$296
Chicago
St. Louis
Outbound
10/10/25
1 Stopover (UIN)
9X0488, 9X0463
03h 35min
Return
11/04/25
direct
AA3580
01h 20min
Southern Airways Express ?
$300
Chicago
St. Louis
Outbound
10/10/25
direct
UA2618
01h 24min
Return
11/04/25
direct
UA1761
01h 28min
United Airlines ?
$805
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 171,75 $
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