C$ 155 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 23/6. 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

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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
Toronto1 stopC$ 355
Ottawa
Ottawa1 stopC$ 518
Toronto
Toronto1 stopC$ 355
Ottawa
Ottawa1 stopC$ 518

Cheap Flight Deals from Denver to Ontario (DEN-CAON)

 
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.

Recent round-trip flight deals from Denver to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Denver to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
WestJet Logo
12:15 p.m. - 12:24 a.m.DEN-YYZ
10h 09m1 stop
WestJet Logo
10:00 a.m. - 6:52 p.m.YYZ-DEN
10h 52m1 stop
C$ 355WestJet
Find Deal
Sat, 21 Jun - Fri, 27 Jun
WestJet Logo
12:15 p.m. - 12:26 a.m.DEN-YYZ
10h 11m1 stop
WestJet Logo
10:25 p.m. - 11:27 a.m.YYZ-DEN
15h 02m1 stop
C$ 362WestJet
Find Deal
Thu, 29 May - Mon, 2 Jun
 Logo
7:40 p.m. - 6:54 a.m.DEN-YYZ
9h 14m1 stop
 Logo
9:45 a.m. - 4:01 a.m.YYZ-DEN
20h 16m2 stops
C$ 422
Find Deal
Thu, 29 May - Sun, 1 Jun
 Logo
7:40 p.m. - 6:54 a.m.DEN-YYZ
9h 14m1 stop
 Logo
8:05 p.m. - 12:23 p.m.YYZ-DEN
18h 18m1 stop
C$ 426
Find Deal
Thu, 29 May - Sun, 1 Jun
Sun Country Air Logo
7:00 p.m. - 10:40 a.m.DEN-YYZ
13h 40m1 stop
Sun Country Air Logo
11:40 a.m. - 4:55 p.m.YYZ-DEN
7h 15m1 stop
C$ 445Sun Country Air
Find Deal
Wed, 13 Aug - Sun, 17 Aug
Sun Country Air Logo
6:25 p.m. - 11:56 a.m.DEN-YYZ
15h 31m1 stop
Sun Country Air Logo
7:30 a.m. - 4:43 p.m.YYZ-DEN
11h 13m1 stop
C$ 485Sun Country Air
Find Deal
Fri, 22 Aug - Mon, 25 Aug
American Airlines Logo
7:27 a.m. - 5:40 p.m.DEN-YYZ
8h 13m1 stop
American Airlines Logo
6:24 p.m. - 8:22 a.m.YYZ-DEN
15h 58m1 stop
C$ 630American Airlines
Find Deal
Tue, 16 Sep - Fri, 19 Sep
Air Canada Logo
11:25 a.m. - 4:35 p.m.DEN-YYZ
3h 10mdirect
Air Canada Logo
8:40 a.m. - 10:20 a.m.YYZ-DEN
3h 40mdirect
C$ 691Air Canada
Find Deal
Sat, 2 Aug - Tue, 5 Aug
American Airlines Logo
8:06 a.m. - 6:35 p.m.DEN-YYZ
8h 29m1 stop
American Airlines Logo
1:20 p.m. - 8:14 p.m.YYZ-DEN
8h 54m1 stop
C$ 702American Airlines
Find Deal
Mon, 26 May - Wed, 11 Jun
Air Canada Logo
5:33 p.m. - 10:48 p.m.DEN-YYZ
3h 15mdirect
Air Canada Logo
9:44 a.m. - 11:28 a.m.YYZ-DEN
3h 44mdirect
C$ 752Air Canada
Find Deal
Mon, 26 May - Wed, 11 Jun
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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$ 496 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$ 496.

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.

No, with an average price for the route of C$ 1,172, prices are generally cheapest when you fly direct.

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$ 359 (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$ 809 and C$ 803 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 Mondays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Ontario, Wednesday 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 seasonMay
Cheapest flightC$ 155
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 3% lower 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 40% 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$ 529.

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$ 344 one-way - C$ 665 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.
7.0
Air CanadaOverall score based on 9254 reviews
7.3Boarding
7.8Crew
7.0Comfort
6.8Entertainment
6.3Food
Airline reviews

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

2.0 MediocreKamini, Apr 2025ORD - YYZ
Read more Air Canada reviews

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

I hope these comments will find their way to AC customer experience team. Me and my spouse 50 years of aged coming back from 7 days perfect vacation... While boarding in FLL flight AC1621, one of the boarding agents (tall aged african american) man literelly yeld at my wife during the picture talking process. MAM ! STEP !! BACK !!! We are not illegal immegrants beying deported, nor are we in the millitary. We are customers returning home. This was unacceptable. While boarding in YYZ flight AC1154, one of the boarding agents (tall aged caucasian) man criticied with several complesant remarks my passport condition saying that I could not travel intl with it due to stain, decoloration, and BLOOD. My passport does not have blood on it! Yes it might be in less than perfect condition, but their are ways to talk to customer that does not imply not allow a boarding agent to be angry fathery like, or a custom agent looking at a suspicious individual. Both experience were less than acceptable for might I remind you a paying CUSTOMER returning home.

This flight didn't happen for me because of overbooking.

Comfortable seats and movies entertainment available. Better experience than the flight from Toronto to Denver.

It was delayed by almost 90 minutes and that messed up our plans but it was beyond UA’s control that is what we heard

Terrible experience, flight was delayed both ways. Limited compensation for the 5+ hour delay. Will not be flying Air Canada Rouge, and don’t recommend you do either.

The boarding was relatively quick, the crew welcoming and flight uneventful. The omission of meals on all airlines is unacceptable especially when the flight is during a mealtime such as this one, (lunchtime), is unacceptable.

Everything was simple and easy. The lady at the gate was super friendly, I wish I had her name to share. She's a little older, dark-haired. You can tell she likes her job and would be a great influence on any young people training with her.

No Charging ports for personal electronics, which were required to use wifi entertainment.

Rushed, the boarding was a great deal like a Chinese fire drill.

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

Information on your arrival and departure airports

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