Cheap flights from Denver to Ontario

Round-trip
1 adult
Economy
From?
To?
Sun 8/8
Sun 8/15

Travel Restriction Alert

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

Flight information for Denver to Ontario
(DEN to ONT)

Find info about flight duration, direct flights, and airports for your flight from Denver to Ontario
Best Price Found$90The best flight deal from Denver to Ontario found on momondo in the last 72 hours is $90
Fastest flight time2h 15mThe fastest flight from Denver to Ontario takes 2h 15m
Direct flightsNoneThere are no direct flights from Denver to Ontario. Popular non-direct route for this connection is Denver Intl Airport - Ontario Airport.
Airports in Ontario1 airportThere is 1 airport near Ontario: Ontario (ONT)

How to get the cheapest flight ticket from Denver to Ontario

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 Denver to Ontario?

August

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

What is the cheapest day to depart Denver for Ontario?

Tuesday

The cheapest day of the week is typically Tuesday. The most expensive is typically Monday

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

at noon

Denver to Ontario flights are approximately 33% more expensive in the morning than at noon

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

Frontier

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

What is the cheapest Denver to Ontario flight route?

Denver Intl - Ontario

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

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

19 days before

The cheapest time to buy a flight from Denver to Ontario is approximately 19 days to departure


Easily compare round-trip flights from Denver to Ontario

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 Denver to Ontario by changing tabs
Frontier
Sep 10
DEN8:40 amDenver Intl
2h 21m
ONT11:01 amOntario
Sep 20
ONT8:35 amOntario
2h 20m
DEN10:55 amDenver Intl
Multiple Airlines
Oct 11
DEN6:29 pmDenver Intl
2h 20m
ONT8:49 pmOntario
Oct 16
ONT1:45 amOntario
2h 18m
DEN4:03 amDenver Intl
Frontier
Aug 24
DEN5:29 amDenver Intl
2h 21m
ONT7:50 amOntario
Sep 1
ONT8:39 pmOntario
2h 27m
DEN11:06 pmDenver Intl
Frontier
Aug 19
DEN5:25 amDenver Intl
2h 21m
ONT7:46 amOntario
Aug 24
ONT7:59 amOntario
2h 21m
DEN10:20 amDenver Intl
Frontier
Oct 11
DEN6:29 pmDenver Intl
2h 20m
ONT8:49 pmOntario
Oct 18
ONT8:39 pmOntario
2h 27m
DEN11:06 pmDenver Intl
Frontier
Aug 19
DEN5:25 amDenver Intl
2h 21m
ONT7:46 amOntario
Aug 23
ONT8:39 pmOntario
2h 27m
DEN11:06 pmDenver Intl

Find the cheapest one-way flights from Denver to Ontario

If you're looking for one-way flights from Denver to Ontario, view some of our deals below provided by Frontier and United Airlines
Frontier
Sep 15
DEN7:35 amDenver Intl
2h 24m
ONT9:59 amOntario
Multiple Airlines
Aug 17
DEN7:41 amDenver Intl
11h 37m
1 stop
ONT7:18 pmOntario
United Airlines
Oct 29
DEN3:45 pmDenver Intl
2h 18m
ONT6:03 pmOntario

Best airlines flying from Denver to Ontario

Compare and see reviews for airlines that fly from Denver to Ontario with momondo
AirlineRatingFree CancellationPrice
Frontier
PriceFrom $63
Free Cancellation
Rating
5.9
6.3

Boarding

5.7

Comfort

6.7

Crew

4.8

Entertainment

5.1

Food

Reviews

Pros: The wonderful crews and the comfortable seat

Cons: Snack and drink

1 / 10
Delta
PriceFrom $67
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
American Airlines
PriceFrom $88
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

Cons: Sarasota ticketing agent was not very nice at all 😟 Houston Gate agent was not nice either. We were treated like we were stupid for asking questions. I hope it’s not racism issues. I wished I had taken their names.

1 / 10

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

    Due to the global impact of COVID-19, some of our airline partners operating flights from Denver Intl to Ontario, 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 Denver Intl to Ontario by plane?

    Denver Intl and Ontario are 800.5 mi apart from one another. In terms of flight time, this usually takes a little over 2h 15m.


Can I fly to Ontario from Denver Intl right now?

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

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

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.

Can I fly back to Denver Intl from Ontario?

Returning to Denver Intl from Ontario

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.

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

Alternative routes for Denver to Ontario

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Denver to Los Angeles Flights
Fastest flight time2h 18m
Cheapest price$54
Denver to Santa Ana Flights
Fastest flight time2h 19m
Cheapest price$71
Denver to Oakland, California Flights
Fastest flight time2h 39m
Cheapest price$78
Denver to San Diego Flights
Fastest flight time2h 16m
Cheapest price$83
Denver to Burbank Flights
Fastest flight time2h 23m
Cheapest price$87
Denver to Sacramento Flights
Fastest flight time2h 27m
Cheapest price$98
Colorado Springs to Los Angeles Flights
Fastest flight time2h 38m
Cheapest price$106
Denver to Fresno Flights
Fastest flight time2h 26m
Cheapest price$109
Denver to San Francisco Flights
Fastest flight time2h 35m
Cheapest price$110
Denver to Reno Flights
Fastest flight time2h 19m
Cheapest price$113
Colorado Springs to San Diego Flights
Fastest flight time4h 37m
Cheapest price$128
Colorado Springs to San Francisco Flights
Fastest flight time4h 47m
Cheapest price$141