Cheap flights from Ontario, CA to Chicago
Travel > North America > United States > Ontario, CA to Chicago flights
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Cheap Chicago airfares from $355/RT are provided by Cheapoair.com. Outbound flight is leaving on 09/10/2025, 12:59 am from Ontario Int`l (ONT) airport and arrives at Chicago O`hare (ORD) at 11:53 pm. The flight time is 22 hours and 54 minutes. The Returning flight departes on 09/14/2025, 06:00 am (other return dates are also available). Date posted: 16 Jun 2025
Price evolution for flights From Ontario, CA To Chicago

Recent Deals on Flights from Ontario, CA to Chicago:Roundtrip / Oneway
- $355
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Ontario, CA (ONT) Chicago, IL (ORD) 09/10/2025 12:59 am Chicago, IL (ORD) Ontario, CA (ONT) 09/14/2025 06:00 am - $383
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Ontario, CA (ONT) Chicago, IL (ORD) 09/10/2025 10:56 pm Chicago, IL (ORD) Ontario, CA (ONT) 09/14/2025 06:00 am - We are sorry but currently there are no oneway offers for flights from Ontario, CA to Chicago.
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