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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 Denver to Ontario. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
The cost of a one-way flight from Denver to Ontario ranges from $29 (February 2026) to $50 (January 2026). On average, the ticket price is about $39–$50.
A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Denver to Ontario:
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Answers to questions about the route that travelers are most interested in.
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Unable to find information about the schedule of direct flights from
Denver — Los Angeles
05/29/2026
Departure
Direct flight
WN1880
starting at $189
starting at $189
starting at $145
Flights from Denver to Ontario are operated by several airlines — Southwest Airlines and American Airlines. This allows passengers to flexibly choose flights based on departure time, cost, and additional services. The minimum ticket price starts at $145, making this destination accessible to travelers with different budgets. We help compare all available options in real time, so you can book tickets at the best value for money. The service ensures transparent search and lets you book affordable flights in just a few clicks.
The cheapest flight ticket from Denver to Ontario according to data for the last 48 hours costs $145
Often the best time to buy tickets from Denver to Ontario is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Denver to Ontario can be found flying in these months: February, January.
The fastest flights from Denver to Ontario start from 2 hours 44 minutes in the air.
The following airlines operate direct flights on the route Denver — Ontario: Southwest Airlines
The cheapest one-way flight from Denver to Ontario departs on 05/29/2026, is operated by American Airlines and costs $145
There is no information about the cheapest roundtrip flight from Denver to Ontario
Fastest flight from Denver to Ontario takes 2h 44m
There are direct flights on this route 1 day a week: Fr
The distance between Denver and Ontario is 1289km (799 miles). There are 63 direct flights from Denver to Ontario. The time difference between Denver and Ontario is 1h. Flights from Denver begin at 7:55 AM. The latest flight from Denver departs at 10:40 PM
A non-stop flight is the most convenient and comfortable way to fly from Denver to Ontario, despite the fact that sometimes flights with transfers can cost significantly less.
We couldn't find any special offers for flights from Denver to Ontario