Flights 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
Chicago
St. Louis
Outbound
06/25/26
direct
UA2465
01h 23min
Return
-
United Airlines
$165
Best option
Chicago
St. Louis
Outbound
04/03/26
direct
AA4532
01h 22min
Return
04/16/26
direct
AA1926
01h 21min
American Airlines ?
$369
Chicago
St. Louis
Outbound
04/03/26
direct
UA2379
01h 28min
Return
04/16/26
direct
UA4423
01h 29min
United Airlines ?
$386
Chicago
St. Louis
Outbound
04/03/26
direct
AA1699
01h 23min
Return
04/16/26
direct
AA1926
01h 21min
American Airlines ?
$457
Chicago
St. Louis
Outbound
04/03/26
1 Stopover (SEA)
AS0329, AS0615
13h 55min
Return
04/16/26
1 Stopover (SEA)
AS0473, AS0410
10h 53min
Alaska Airlines ?
$654
Chicago
St. Louis
Outbound
04/03/26
direct
AA1699
01h 23min
Return
04/16/26
direct
AA1926
01h 21min
American Airlines ?
$977
Chicago
St. Louis
Outbound
04/03/26
1 Stopover (LAS)
F92145, F93108
14h 33min
Return
04/16/26
3 Stopovers (DFW, BCN, DUB)
IB4235, IB4792, EI0565, EI0123
52h 15min
Frontier Airlines ?
$1,333
Chicago
St. Louis
Outbound
04/03/26
1 Stopover (LAS)
F92145, F93108
14h 33min
Return
04/16/26
3 Stopovers (DFW, LHR, LCY, ZRH)
IB4888, IB4206, LX0467, LX0006
42h 20min
Frontier Airlines ?
$1,402
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

Cheapest outbound flight from 165,00 $
Roundtrip from 368,90 $
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