Cheap flights from Illinois to Ontario, CA
Travel > North America > United States > Illinois to Ontario, CA flights
Fort William Historical Park: this is one of the most visited places of this city as one learns about the nineteenth century fur trade. Apart from fur trading, this attraction is also popular for spectacular sights that captivate the visitors in an interesting way.... (read more in our Ontario Sightseeing)
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Cheapest flights found for the next 6 months
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Check our newest flight offers to Ontario, CA:
- $158
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (MDW) Ontario, CA (ONT) 02/07/2025 12:43 pm Ontario, CA (ONT) Chicago, IL (MDW) 02/15/2025 12:59 am - $188 Frontier Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (ORD) Ontario, CA (ONT) 01/05/2025 08:34 pm Ontario, CA (ONT) Chicago, IL (ORD) 01/19/2025 01:50 pm - $188 Frontier Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (MDW) Ontario, CA (ONT) 01/05/2025 08:41 pm Ontario, CA (ONT) Chicago, IL (MDW) 01/19/2025 08:01 am - $233
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (MDW) Ontario, CA (ONT) 02/07/2025 12:43 pm Ontario, CA (ONT) Chicago, IL (MDW) 02/15/2025 07:10 am - $318 Frontier Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (MDW) Ontario, CA (ONT) 01/06/2025 10:04 pm Ontario, CA (ONT) Chicago, IL (MDW) 01/19/2025 08:11 pm
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