Cheap flights from Ontario to Denver

Round-trip
Economy
Los Angeles (LAX)
Denver (DEN)
Mon 8/23
Mon 8/30
Any month
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Travel Restriction Alert

The COVID-19 (coronavirus) outbreak may impact travel from Ontario to Denver.
View current United States travel restrictions

Flight information for Ontario to Denver
(ONT to DEN)

Find info about flight duration, direct flights, and airports for your flight from Ontario to Denver
Best Price Found$98The best flight deal from Ontario to Denver found on momondo in the last 72 hours is $98
Fastest flight time2h 11mThe fastest flight from Ontario to Denver takes 2h 11m
Direct flightsNoneThere are no direct flights from Ontario to Denver. Popular non-direct route for this connection is Ontario - Denver Intl.
Airports in Denver2 airportsThere are 2 airports near Denver: Denver Arapahoe Co (APA), Denver Intl (DEN)

How to get the cheapest flight ticket 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 ticket for your trip

What is the cheapest month to fly from Ontario to Denver?

April
The cheapest time of year to fly to Denver from Ontario is April. Most expensive is December

What is the cheapest day to depart Ontario for Denver?

Thursday
The cheapest day of the week is typically Thursday. The most expensive is typically Sunday

When is the cheapest time to fly from Ontario to Denver?

in the evening
Ontario to Denver flights are approximately 40% more expensive at noon than in the evening

What is the cheapest airline that flies to Denver from Ontario?

Frontier
Frontier, Delta, and Spirit Airlines are the most popular carriers operating from Ontario to Denver

What is the cheapest Ontario to Denver flight route?

Ontario - Denver Intl
Fly from Ontario to Denver Intl for the best Ontario - Denver flight prices
ONT
Ontario
DEN
Denver Intl

How far in advance should you book Ontario to Denver flights?

18 days before
The cheapest time to buy a flight from Ontario to Denver is approximately 18 days to departure
60
Days before departure
0

Easily compare round-trip flights from Ontario to Denver

Below you can see the best fares for your round-trip flight 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
Frontier
Aug 13
ONT8:57 amOntario
2h 20m
DEN11:17 amDenver Intl
Aug 16
DEN6:29 pmDenver Intl
2h 15m
ONT8:44 pmOntario
Multiple Airlines
Sep 7
ONT1:45 amOntario
2h 17m
DEN4:02 amDenver Intl
Sep 19
DEN2:17 pmDenver Intl
2h 22m
ONT4:39 pmOntario
Frontier
Sep 24
ONT8:35 amOntario
2h 20m
DEN10:55 amDenver Intl
Sep 27
DEN6:29 pmDenver Intl
2h 21m
ONT8:50 pmOntario

Find the cheapest one-way flights from Ontario to Denver

If you're looking for one-way flights from Ontario to Denver, view some of our deals below provided by Frontier
United Airlines
Aug 14
ONT1:45 amOntario
2h 17m
DEN4:02 amDenver Intl
United Airlines
Sep 6
ONT1:45 amOntario
2h 17m
DEN4:02 amDenver Intl
Frontier
Aug 23
ONT8:57 amOntario
2h 20m
DEN11:17 amDenver Intl

Best airlines flying from Ontario to Denver

Compare and see reviews for airlines that fly from Ontario to Denver with momondo
AirlineRatingFree CancellationPrice
Delta
PriceFrom $57
Free Cancellation
Rating
8.2
8.3

Boarding

8.5

Comfort

8.3

Crew

7.9

Entertainment

8.0

Food

Reviews

Cons: Wouldn't let us on the flight when there was plenty of time to get there. Manager was arrogant and slow - didn't care. Poor policies at that airport.

1 / 10
Frontier
PriceFrom $60
Free Cancellation
Rating
6.2
6.5

Boarding

6.0

Comfort

6.8

Crew

5.2

Entertainment

5.4

Food

Reviews

Pros: The wonderful crews and the comfortable seat

Cons: Snack and drink

1 / 10
American Airlines
PriceFrom $82
Free Cancellation
Rating
7.2
7.4

Boarding

7.1

Comfort

7.8

Crew

7.0

Entertainment

6.8

Food

Reviews

Pros: Delayed flight no reasons seems like American Airlines don’t know what to do in these situations

Cons: I believe this airlines should have figured the answer to this question by now.

1 / 10
United Airlines
PriceFrom $98
Free Cancellation
Rating
6.8
7.2

Boarding

6.6

Comfort

7.5

Crew

6.6

Entertainment

6.1

Food

Reviews

Pros: Everything! From ticketing agent to all the crew on our flight back were awesome. Thank you!

1 / 10
Spirit Airlines
PriceFrom $125
Free Cancellation
Rating
6.6
6.8

Boarding

6.3

Comfort

7.2

Crew

5.6

Entertainment

5.7

Food

Reviews

Pros: Well, it was not very comfortable and we were delayed for an hour. And a crew member was sick.

Cons: Mostly everything.

1 / 10
Southwest
PriceFrom $158
Free Cancellation
Rating
8.3
8.5

Boarding

8.4

Comfort

8.7

Crew

7.5

Entertainment

7.7

Food

Reviews

Pros: The plane was new and the seats were nice.

1 / 10

Are airlines flying from Ontario to Denver Intl offering flexible cancellation due to COVID-19?

Due to the global impact of COVID-19, some of our airline partners operating flights from Ontario to Denver Intl, such as Frontier, United Airlines, and American Airlines may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.

How far is Ontario to Denver Intl by plane?

The straight-line distance from Ontario to Denver Intl is 800.5 mi. A reasonable flight in good conditions will take 2h 17m.

Can I fly to Denver Intl from Ontario right now?

Information is based on travel restrictions for travel to Denver Intl within the United States

Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter Denver Intl.

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Denver Intl.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering Denver Intl.

Can I fly back to Ontario from Denver Intl?

Returning to Ontario from Denver Intl

COVID-19 testing requirements
Visitors from Denver Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.

Quarantine requirements
Visitors from Denver Intl are not required to quarantine after entering Ontario.

If you are planning to travel to Denver at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.

Flights from Ontario to:

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Economy
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