Starting at $28
Helping travelers to find the best flight offers
A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Ontario to Denver:
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
Starting at $28
Unable to find information about the schedule of direct flights from
Below you will find a list of airlines operating flights on the Ontario — Denver route and the starting prices for flights of each specific airline on it.
The cheapest one-way flight from Ontario to Denver departs on 05/25/2025, is operated by Frontier Airlines and costs $72
The cheapest roundtrip flight from Ontario to Denver departs on 05/09/2025, is operated by Frontier Airlines and costs $140
Fastest flight from Ontario to Denver takes 2h 16m
There are direct flights on this route 4 days a week: Su, Mo, Th, and Fr
The distance between Ontario and Denver is 1289km (799 miles). There are 69 direct flights from Ontario to Denver. The time difference between Ontario and Denver is 1h . Flights from Ontario begin at 5:00 AM. The latest flight from Ontario departs at 12:59 AM.
We couldn't find any special offers for flights from Ontario to Denver
Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Ontario to Denver. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Ontario to Denver
A direct flight is the most convenient and comfortable way to fly from Ontario to Denver, despite the fact that sometimes flights with transfers can cost significantly less.
Los Angeles — Denver
04/20/2025
Departure date
Direct flight
WN2515
Starting at $159
Los Angeles — Denver
04/27/2025
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Direct flight
F94346
Starting at $176
Los Angeles — Denver
04/28/2025
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Direct flight
F94346
Starting at $90
Los Angeles — Denver
05/26/2025
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Direct flight
WN1951
Starting at $132
Ontario — Denver
05/24/2025
Departure date
Direct flight
UA1942
Starting at $183
Ontario — Denver
04/19/2025
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Direct flight
WN533
Starting at $181
Ontario — Denver
04/21/2025
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Direct flight
UA1460
Starting at $192
Ontario — Denver
06/27/2025
Departure date
Direct flight
F92908
Starting at $96
Ontario — Denver
05/16/2025
Departure date
Direct flight
UA1575
Starting at $154
The cheapest flight ticket from Ontario to Denver according to data for the last 48 hours costs $72
Often the best time to buy tickets from Ontario to Denver is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Ontario to Denver can be found flying in these months: May.
The fastest flights from Ontario to Denver start from 2 hours 16 minutes in the air.
The following airlines operate direct flights on the route Ontario — Denver: Southwest Airlines, Frontier Airlines, United Airlines
