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	Baggage	Price
Best option Chicago O'Hare St. Louis	Outbound 11/09/25 direct UA2618 01h 26min	Return 12/07/25 direct UA1641 01h 23min	United Airlines	?	$192
Chicago O'Hare St. Louis Please note: transfer for connecting flight	Outbound 11/09/25 2 Stopovers (BNA, JBR) NK0416, 9X0459, 9X0454 26h 35min	Return 12/07/25 1 Stopover (FLL) NK2158, NK1986 21h 03min	Spirit Airlines, Southern Airways Express		$281
Chicago O'Hare St. Louis	Outbound 11/09/25 direct UA4416 01h 34min	Return 12/07/25 direct UA3598 01h 30min	United Airlines		$201
Chicago O'Hare St. Louis	Outbound 11/09/25 1 Stopover (ATL) F91596, F94473 05h 11min	Return 12/07/25 1 Stopover (ATL) F94474, F93397 05h 42min	Frontier Airlines		$206
Chicago O'Hare St. Louis	Outbound 11/09/25 1 Stopover (DEN) F91483, F93302 27h 07min	Return 12/07/25 1 Stopover (MCO) F92636, F92791 25h 33min	Frontier Airlines	?	$229
Chicago O'Hare St. Louis	Outbound 02/13/26 direct AA1926 01h 19min	Return 02/26/26 direct AA1699 01h 21min	American Airlines	?	$233
Chicago O'Hare St. Louis	Outbound 11/09/25 direct UA4613 01h 31min	Return 12/07/25 direct AA4605 01h 40min	United Airlines	?	$245
Chicago O'Hare St. Louis	Outbound 02/13/26 direct UA4491 01h 31min	Return 02/26/26 direct UA2267 01h 29min	United Airlines	?	$295
Chicago O'Hare St. Louis	Outbound 02/13/26 direct AA1926 01h 19min	Return 02/26/26 direct AA1699 01h 21min	American Airlines	?	$395
Chicago O'Hare 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

Important flight information

Flight information: Chicago O'Hare - St. Louis

Roundtrip from	$191.77
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