Flight Routes from Chicago O'Hare to St. Louis

Trip type

Our cheapest offers for flights from Chicago O'Hare to St. Louis

Here you can compare cheap flights from Chicago O'Hare (ORD) 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 O'Hare
St. Louis
Outbound
08/20/26
1 Stopover (DTW)
DL3673, DL2822
06h 16min
Return
08/25/26
1 Stopover (DTW)
DL1626, DL1716
06h 38min
Delta Air Lines ?
$246
Best option
Chicago O'Hare
St. Louis
Outbound
08/20/26
direct
AA3620
01h 24min
Return
08/25/26
direct
AA3568
01h 28min
American Airlines
$284
Chicago O'Hare
St. Louis
Please note: transfer for connecting flight
Outbound
08/20/26
1 Stopover (ATL)
F91596, F94473
25h 57min
Return
08/25/26
1 Stopover (ATL)
F94474, F93397
25h 22min
Frontier Airlines
$250
Chicago O'Hare
St. Louis
Outbound
08/20/26
1 Stopover (MCO)
F93044, F92635
06h 44min
Return
08/25/26
1 Stopover (MCO)
F92636, F92791
07h 04min
Frontier Airlines ?
$254
Chicago O'Hare
St. Louis
Outbound
08/20/26
direct
UA1032
01h 31min
Return
08/25/26
direct
UA0567
01h 34min
United Airlines
$305
Chicago O'Hare
St. Louis
Outbound
08/20/26
direct
UA0775
01h 33min
Return
08/25/26
direct
UA0567
01h 34min
United Airlines ?
$306
Chicago O'Hare
St. Louis
Outbound
08/20/26
direct
AA6355
01h 25min
Return
08/25/26
direct
AA4259
01h 39min
American Airlines ?
$423
Chicago O'Hare
St. Louis
Outbound
08/20/26
1 Stopover (SEA)
AS0579, AS0472
10h 56min
Return
08/25/26
4 Stopovers (CLT, MIA, SJU, MIA)
AA0712, AA2768, AA1852, AA2817, AA0483
41h 41min
Alaska Airlines ?
$789
Chicago O'Hare
St. Louis
Outbound
08/20/26
direct
AA6355
01h 25min
Return
08/25/26
direct
AA4259
01h 39min
American Airlines ?
$3,008
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: Chicago O'Hare - St. Louis

Roundtrip from $245.14
Distance 416 km
Departure airport Airport Chicago O'Hare International Airport, IL (ORD)
Arrival airport Airport St. Louis - Lambert International Airport (STL)
Destination country Flights to United States
City-Code - Arrival airport Chicago - St. Louis - Lambert International Airport
Departure airport - Destination country Chicago O'Hare International Airport, IL - United States
Alternative routes to United States
Alternative flights to St. Louis
Flight destinations with a similar price
Flight destinations with a similar price