C$ 124 Find Cheap Flights from Denver to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Ontario departing on 24/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Ontario, as well as popular online travel agencies
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Best Ontario Flight Deals from Denver

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Toronto
Toronto2 stopsC$ 350
Ottawa
Ottawa1 stopC$ 356
Toronto
Toronto2 stopsC$ 350
Ottawa
Ottawa1 stopC$ 356

Cheap Flights from Denver to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Ontario

Wed, 20 Aug - Sun, 31 Aug
WestJet Logo
12:15 p.m. - 12:43 a.m.DEN-YUL
10h 28m1 stop
WestJet Logo
5:30 p.m. - 11:24 a.m.YUL-DEN
19h 54m1 stop
C$ 338WestJet
Find Deal
Tue, 22 Jul - Tue, 29 Jul
WestJet Logo
12:15 p.m. - 12:33 a.m.DEN-YYZ
10h 18m2 stops
WestJet Logo
10:25 p.m. - 11:27 a.m.YYZ-DEN
15h 02m1 stop
C$ 350WestJet
Find Deal
Mon, 7 Jul - Tue, 15 Jul
Air Canada Logo
7:05 p.m. - 8:19 a.m.DEN-YOW
11h 14m1 stop
Air Canada Logo
6:00 a.m. - 10:21 a.m.YOW-DEN
6h 21m1 stop
C$ 356Air Canada
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Wed, 30 Jul - Wed, 6 Aug
 Logo
12:15 p.m. - 12:24 a.m.DEN-YYZ
10h 09m1 stop
 Logo
6:20 p.m. - 8:00 p.m.YYZ-DEN
3h 40mdirect
C$ 395
Find Deal
Mon, 7 Jul - Wed, 9 Jul
Air Canada Logo
7:05 p.m. - 8:19 a.m.DEN-YOW
11h 14m1 stop
Air Canada Logo
6:00 a.m. - 10:21 a.m.YOW-DEN
6h 21m1 stop
C$ 401Air Canada
Find Deal
Tue, 22 Jul - Wed, 30 Jul
 Logo
12:15 p.m. - 12:33 a.m.DEN-YYZ
10h 18m2 stops
 Logo
7:00 a.m. - 3:18 p.m.YYZ-DEN
10h 18m1 stop
C$ 401
Find Deal
Tue, 1 Jul - Fri, 11 Jul
United Airlines Logo
6:01 a.m. - 2:13 p.m.DEN-YOW
6h 12m1 stop
United Airlines Logo
6:33 a.m. - 2:46 p.m.YOW-DEN
10h 13m1 stop
C$ 421United Airlines
Find Deal
Mon, 7 Jul - Sat, 12 Jul
United Airlines Logo
7:45 a.m. - 5:05 p.m.DEN-YOW
7h 20m1 stop
United Airlines Logo
6:25 a.m. - 11:28 a.m.YOW-DEN
7h 03m1 stop
C$ 520United Airlines
Find Deal
Tue, 15 Jul - Tue, 22 Jul
American Airlines Logo
5:00 a.m. - 2:45 p.m.DEN-YUL
7h 45m1 stop
American Airlines Logo
2:35 p.m. - 10:47 p.m.YUL-DEN
10h 12m2 stops
C$ 574American Airlines
Find Deal
Mon, 22 Sep - Tue, 30 Sep
American Airlines Logo
5:37 p.m. - 4:30 p.m.DEN-YUL
20h 53m1 stop
American Airlines Logo
5:15 p.m. - 8:36 a.m.YUL-DEN
17h 21m1 stop
C$ 579American Airlines
Find Deal
Useful Info

KAYAK's insights & trends for Denver to Ontario flights

Get data-powered insights and trends into flights from Denver to Ontario to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Denver to Ontario flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Denver to Ontario.

The cheapest ticket to Ontario from Denver found in the last 72 hours was to Toronto, at C$ 227 round-trip. The most popular route is from Denver (DEN) to Toronto Pearson Intl Airport (YYZ), and the cheapest round-trip airline ticket found on this route in the last 72 hours was C$ 227.

Can I save money by flying with a layover from Denver to Ontario?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 601 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Ontario is March, when tickets cost C$ 353 (return) on average. On the other hand, the most expensive months are November and August, when the average cost of round-trip tickets is C$ 794 and C$ 779 respectively.

What’s the cheapest day of the week to fly from Denver to Ontario?

The average price of all round-trip flights from Denver to Ontario clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Denver to Ontario, look for departures on Thursdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Ontario, Friday is the cheapest day to fly and Monday is the most expensive.

How far in advance should I book a flight from Denver to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on the flight from Denver to Ontario, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.


Good to know

Low seasonApril
High seasonAugust
Cheapest flightC$ 124
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly (5% more expensive on average)
Flight from Denver to Toronto Pearson Airport

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from Denver to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver to Ontario is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Denver to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Denver to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Ontario?

    The cheapest time of day to fly to Ontario is generally in the afternoon, when round-trip flights cost C$ 325 on average. Morning departures are around 34% more expensive than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 504.

Top tips for finding cheap flights to Ontario

  • Looking for a cheap flight? 25% of our users found tickets from Denver to the following destinations at these prices or less: Toronto C$ 418 one-way - C$ 236 round-trip

Top airline flying from Denver to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Denver to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 9553 reviews
6.3Food
7.3Boarding
7.0Comfort
7.8Crew
6.8Entertainment
Airline reviews

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

6.0 GoodAnonymous, Jun 2025CMH - YYZ
Read more Air Canada reviews

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

When arriving over 2 hours early to check k in at Charlotte airport I was told I would have to check my carry on ? Apparently the flight was full and may not be room. I was not given a choice and the agent was quite unpleasant about it. I am a senior amd was not comfortable me having to worry about my bag being lost vut it didn’t seem to bother him. There were lots and lots of people of all ages in line when we boarded with carryons and most larger than mine .the rest of my journey was pleasant vut this was totally unacceptable.

The layover was 6 PLUS hours and we were only given a $15.00 voucher. We missed our first activity in Quebec due to the delay.

Miserable staff as it was a late/delayed flight and crew wasn’t in the best spirits. Completely understood as neither was most of the passengers. Still unacceptable l.

It was a short flight, and no entertainment. That was not a problem for us, but there is no option for "not applicable". There was a bit of turbulence, so there was no food service.

the fact air Canada changed my flight from 850 PM to 815 AM with zero regard to the plans i made that last day, the cost i lost out on as things were non refundable amd shortening my first vacation in 7 years sickened me. when we purchase a service thats whats we expect. when we want to change the service we have to pay for that option but you do whatever you want . i called accessibility dept as i have a cpap and an implanted loop recorder first person said no problem just let security know you cant go thru scanners. then i got an email saying i had to fill out a fit to fly form . which again there was NO need to have that none. But that cost me money and time to have a doctor fill it out. then when i went to check in online i was declined i had to see a person at the airport instead. i couldnt get my boarding pass like everyone elseso here I was contacting air canada so I would have a easy travel experience and it ended up being a nightmare with more work for me, more cost and time. the flight itself was great the nightmare around it i will never subject myself to again. i tried to stick with supporting Canada but Air Canada was not worth supporting. very disappointed especially with a dept that is supposed to help disabled people not make an already challenging event not worth going thru at all.

Most courteous, helpful employees and all flights were on time.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

Everything you need to know for your flight from Denver to Ontario

Information on your arrival and departure airports

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