Flights from Ontario to Denver

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Ontario to Denver flight comparison made easy

Below you can see the best fares for your route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to Denver by changing tabs
Quickest
Cheapest
Frontier
Frontier
31 May
ONT
1:43 pm
Ontario airport
2h 15m
4:58 pm
DEN
Denver Intl airport
Frontier
08 Jun
DEN
3:05 pm
Denver Intl airport
2h 20m
4:25 pm
ONT
Ontario airport
137 USD
Frontier
Frontier
01 Jun
ONT
1:43 pm
Ontario airport
2h 15m
4:58 pm
DEN
Denver Intl airport
Frontier
08 Jun
DEN
3:05 pm
Denver Intl airport
2h 20m
4:25 pm
ONT
Ontario airport
137 USD
Frontier
Frontier
31 Jul
ONT
1:25 pm
Ontario airport
2h 17m
4:42 pm
DEN
Denver Intl airport
Frontier
07 Aug
DEN
2:57 pm
Denver Intl airport
2h 20m
4:17 pm
ONT
Ontario airport
137 USD
Southwest
Southwest
06 Jun
ONT
11:40 pm
Ontario airport
2h 05m
2:45 am
+1
DEN
Denver Intl airport
Southwest
08 Jun
DEN
1:15 pm
Denver Intl airport
2h 14m
2:29 pm
ONT
Ontario airport
288 USD
United Airlines
United Airlines
30 May
ONT
11:35 pm
Ontario airport
2h 12m
2:47 am
+1
DEN
Denver Intl airport
United Airlines
01 Jun
DEN
2:49 pm
Denver Intl airport
2h 20m
4:09 pm
ONT
Ontario airport
167 USD
Frontier
Frontier
31 May
ONT
1:43 pm
Ontario airport
2h 15m
4:58 pm
DEN
Denver Intl airport
Frontier
08 Jun
DEN
3:05 pm
Denver Intl airport
2h 20m
4:25 pm
ONT
Ontario airport
137 USD

How to get the cheapest flight from Ontario to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight for your trip
CHEAPEST MONTH TO FLY
September
The cheapest time of year to fly to Denver from Ontario is September. Most expensive is December
CHEAPEST DAY TO FLY
Saturday
The cheapest day of the week is typically Saturday. The most expensive is typically Sunday
CHEAPEST TIME TO FLY
in the Evening
Ontario to Denver flights are approximately 78% more expensive at Noon than in the Evening
CHEAPEST AIRLINE
Frontier
Frontier, Delta, and Spirit Airlines are the most popular carriers operating from Ontario to Denver
CHEAPEST ROUTE
Ontario - Denver Intl
Fly from Ontario to Denver Intl for the best Ontario - Denver flight prices
ONT
Ontario
DEN
Denver Intl
CHEAPEST TIME TO BOOK
24 days before
The cheapest time to buy a flight from Ontario to Denver is approximately 24 days to departure
60
Days before departure
0

Flight information for Ontario to Denver

Find info about flight duration, direct flights, and airports for your flight from Ontario to Denver
Fastest flight time
2h 5m
The fastest flight from Ontario to Denver takes 2h 5m.
Direct flights
Every day
Direct flights go from Ontario to Denver every day.
Airports in Denver
2 airports
There are 2 airports near Denver: Denver Arapahoe Co (APA), Denver Intl (DEN)

Alternative routes for Ontario to Denver

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times

Flights from Ontario to:

Flights to Denver from:

  • Ontario
  • California
  • United States
  • North America