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
06/25/26
direct
UA2465
01h 23min
Return
-
United Airlines
$165
Best option
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
02/13/26
direct
UA4491
01h 31min
Return
02/26/26
direct
UA2267
01h 29min
United Airlines ?
$295
Chicago
St. Louis
Outbound
04/03/26
direct
AA1699
01h 23min
Return
04/16/26
direct
AA1926
01h 21min
American Airlines ?
$369
found yesterday
Chicago
St. Louis
Outbound
04/03/26
direct
UA2379
01h 28min
Return
04/16/26
direct
UA4423
01h 29min
United Airlines ?
$386
found yesterday
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
04/03/26
direct
AA1699
01h 23min
Return
04/16/26
direct
AA1926
01h 21min
American Airlines ?
$457
found yesterday
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
Chicago
St. Louis
Outbound
02/13/26
1 Stopover (SEA)
AS0407, AS0615
09h 56min
Return
02/26/26
1 Stopover (SEA)
AS0314, AS0328
14h 09min
Alaska Airlines ?
$549
Chicago
St. Louis
Outbound
04/03/26
1 Stopover (SEA)
AS0329, AS0615
13h 55min
Return
04/16/26
1 Stopover (SEA)
AS0314, AS0328
14h 05min
Alaska Airlines ?
$654
found yesterday
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 $ 232,30
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