Cheapest flights from Denver to Ontario
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.
Cheapest one way flight
$81
Southwest Airlines
Direct flight
2h 15m
09/10/2025
The cheapest one-way flight from Denver to Ontario departs on 09/10/2025, is operated by Southwest Airlines and costs $81
Cheapest round trip flight
$145
Frontier Airlines
Direct flight
4h 40m
07/10/2025
The cheapest roundtrip flight from Denver to Ontario departs on 07/10/2025, is operated by Frontier Airlines and costs $145
The fastest flight
2h 15m
Fastest flight from Denver to Ontario takes 2h 15m
Direct flights
Several times a week
There are direct flights on this route 4 days a week: Su, Tu, We, and Th
Earliest flight
7:40 AM
Latest flight
10:37 PM
Direct flights count
67
Distance
1289km
Timezone difference
1h
The distance between Denver and Ontario is 1289km (799 miles). There are 67 direct flights from Denver to Ontario. The time difference between Denver and Ontario is 1h . Flights from Denver begin at 7:40 AM. The latest flight from Denver departs at 10:37 PM.
