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
06/25/26
direct
AA6352
01h 28min
Return
06/30/26
direct
AA6352
01h 36min
American Airlines ?
$349
Chicago
St. Louis
Outbound
06/25/26
direct
AA1004
01h 14min
Return
06/30/26
direct
AA4104
01h 32min
American Airlines
$392
Chicago
St. Louis
Outbound
06/25/26
direct
AA6352
01h 28min
Return
06/30/26
direct
AA4537
01h 44min
American Airlines ?
$473
Chicago
St. Louis
Outbound
06/25/26
direct
AA6352
01h 28min
Return
06/30/26
direct
AA4144
01h 44min
American Airlines ?
$475
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
Chicago
St. Louis
Outbound
06/25/26
1 Stopover (MSP)
DL1306, DL1609
05h 41min
Return
06/30/26
1 Stopover (ATL)
DL1536, DL1477
07h 00min
Delta Air Lines ?
$3,077
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 $ 348,55
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