Cheap flights from Denver to Ontario, CA
Travel > North America > United States > Denver to Ontario, CA flights
Check our current prices for flights from Denver to Ontario, CA. Please note that we also give you historical search data for this city connection. These are all airfares that people found in the past, in order to find more current flight information from Denver to Ontario, CA, you will need to run a search below.
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Cheap Ontario airfares from $48/RT are provided by Cheapoair.com. Outbound flight is leaving on 02/22/2025, 10:37 pm from Denver International Airport (DEN) airport and arrives at Ontario Int`l (ONT) at 12:09 am. The flight time is 1 hours and 32 minutes. The Returning flight departes on 03/05/2025, 12:59 am (other return dates are also available). Date posted: 01 Feb 2025
Price evolution for flights From Denver To Ontario, CA

Recent Deals on Flights from Denver to Ontario, CA:Roundtrip / Oneway
- $48
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 02/22/2025 10:37 pm Ontario, CA (ONT) Denver, CO (DEN) 03/05/2025 12:59 am - $48
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 03/26/2025 10:37 pm Ontario, CA (ONT) Denver, CO (DEN) 04/02/2025 12:59 am - $68
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 02/26/2025 10:34 pm Ontario, CA (ONT) Denver, CO (DEN) 03/12/2025 12:59 am - $68
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 04/16/2025 10:37 pm Ontario, CA (ONT) Denver, CO (DEN) 04/30/2025 12:10 pm - $81
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 02/26/2025 10:34 pm Ontario, CA (ONT) Denver, CO (DEN) 03/18/2025 12:59 am - $24
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 03/12/2025 10:32 pm - $39
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 03/12/2025 10:37 pm - $39
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 05/14/2025 10:00 am - $49
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 02/23/2025 07:58 am - $49
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Denver, CO (DEN) Ontario, CA (ONT) 03/06/2025 07:55 am
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