C$ 154 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 10/1. 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, 0 bags

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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Flight Deals

Best Ontario Flight Deals from Denver

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Toronto
Toronto1 stopC$ 352
Ottawa
Ottawa1 stopC$ 440
Toronto
Toronto1 stopC$ 352
Ottawa
Ottawa1 stopC$ 440

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

Tue, 13 Jan - Sat, 17 Jan
Multiple Airlines Logo
8:13 a.m. - 7:55 p.m.
DEN
-
YYZ
9h 42m1 stop
Multiple Airlines Logo
3:15 p.m. - 8:38 p.m.
YYZ
-
DEN
7h 23m1 stop
C$ 352Multiple Airlines
Tue, 13 Jan - Sat, 17 Jan
Multiple Airlines Logo
9:20 p.m. - 7:36 p.m.
DEN
-
YYZ
20h 16m2 stops
Multiple Airlines Logo
3:15 p.m. - 8:38 p.m.
YYZ
-
DEN
7h 23m1 stop
C$ 367Multiple Airlines
Tue, 13 Jan - Mon, 19 Jan
Multiple Airlines Logo
8:13 a.m. - 7:55 p.m.
DEN
-
YYZ
9h 42m1 stop
Multiple Airlines Logo
10:15 a.m. - 12:19 p.m.
YYZ
-
DEN
52h 04m2 stops
C$ 368Multiple Airlines
Tue, 13 Jan - Mon, 19 Jan
Multiple Airlines Logo
8:13 a.m. - 7:55 p.m.
DEN
-
YYZ
9h 42m1 stop
Multiple Airlines Logo
6:20 p.m. - 1:37 a.m.
YYZ
-
DEN
9h 17m1 stop
C$ 375Multiple Airlines
Thu, 8 Jan - Wed, 14 Jan
Air Canada Logo
11:15 a.m. - 4:58 p.m.
DEN
-
YUL
3h 43mdirect
Air Canada Logo
5:25 p.m. - 7:55 p.m.
YUL
-
DEN
4h 30mdirect
C$ 641Air Canada
Thu, 8 Jan - Sun, 11 Jan
Air Canada Logo
11:15 a.m. - 4:58 p.m.
DEN
-
YUL
3h 43mdirect
Air Canada Logo
7:30 a.m. - 5:44 p.m.
YUL
-
DEN
12h 14m1 stop
C$ 648Air Canada
Thu, 8 Jan - Wed, 14 Jan
Delta Logo
11:25 a.m. - 6:37 p.m.
DEN
-
YUL
29h 12m1 stop
Delta Logo
9:34 a.m. - 8:44 p.m.
YUL
-
DEN
13h 10m1 stop
C$ 650Delta
Tue, 17 Feb - Tue, 24 Feb
United Airlines Logo
5:50 p.m. - 5:07 p.m.
DEN
-
YOW
21h 17m2 stops
United Airlines Logo
5:11 p.m. - 7:05 a.m.
YOW
-
DEN
15h 54m2 stops
C$ 934United Airlines
Fri, 1 May - Tue, 5 May
WestJet Logo
12:15 p.m. - 12:45 a.m.
DEN
-
YKF
10h 30m1 stop
WestJet Logo
6:00 a.m. - 5:40 p.m.
YKF
-
DEN
13h 40m2 stops
C$ 1,176WestJet
Fri, 1 May - Tue, 5 May
WestJet Logo
12:15 p.m. - 12:40 a.m.
DEN
-
YHM
10h 25m1 stop
WestJet Logo
6:00 a.m. - 5:40 p.m.
YHM
-
DEN
13h 40m2 stops
C$ 1,186WestJet
Booking Insights

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?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Ontario from Denver found in the last 72 hours was to Toronto, at C$ 226 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$ 226.

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$ 247, 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$ 363 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is C$ 793 and C$ 764 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 Sunday, 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 a flight from Denver to Ontario, you should book around 4 weeks before departure, which saves you about 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonNovember
Cheapest flightC$ 154
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Denver to Toronto

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 evening, when round-trip flights cost C$ 525 on average. Morning departures are around 15% more expensive than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the afternoon, which is peak travel time and where the average cost of a ticket is C$ 1,285.

Reviews of the top airlines 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.
7.4
United AirlinesOverall score based on 9095 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

8.0 ExcellentSteve, Dec 2025
DEN - YYZ
Read more United Airlines reviews

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Flight was good but there are way to many announcements for credit cards etc.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

The seat and leg room was not good. The food and beverage service was good.

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

Pearson Airport could not properly handle all the passengers who they needed to process in order to properly get them on board. As a result, I missed the departure of my flight from Toronto. The only saving grace is that Air Canada found a flight that only delayed me by one hour. However, this was no thanks to Pearson Airport!

Almost everything it was a “cool” ambiance but we arrived to Toronto so that it’s ok for me

The crew was really nice. The plane seats were kinda small even for a 5’6” / 158 lbs person.

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

Information on your arrival and departure airports