C$ 124 Find Cheap Flights from Colorado to Ontario

1 adult
1 adult, Economy

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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 for booking flights from Colorado to Ontario

  • How does KAYAK find such low prices on flights from Colorado 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 Colorado to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado 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 Colorado 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 Colorado 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 Colorado 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 Colorado to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Ontario?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Ontario is Toronto Pearson Intl Airport (YYZ), with an average flight price of C$ 606.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Thursday when round-trip tickets can be as cheap as C$ 488. On the other hand, the most expensive day to fly is Friday, when round-trip prices are C$ 719 on average.

  • 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.

  • What is the cheapest flight to Ontario?

    The cheapest ticket to Ontario from Colorado found in the last 72 hours was to Toronto Pearson Intl Airport, at C$ 167 round-trip. The most popular route is 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$ 167.

  • What is the cheapest month to fly from Colorado to Ontario?

    The cheapest month for flights from Colorado to Ontario is February, when tickets cost C$ 459 (return) on average. On the other hand, the most expensive months are August and April, when the average cost of round-trip tickets is C$ 737 and C$ 736 respectively.

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

    To get a below-average price on the flight from Colorado 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.

  • How long is the flight to Ontario?

    An average direct flight from Colorado to Ontario takes 10h 01m, covering a distance of 3646 km. The shortest route is Denver (DEN) to Toronto Pearson Intl Airport (YYZ) with an average flight time of 3h 06m.

  • What are the most popular destinations in Ontario?

    Based on KAYAK flight searches, the most popular destination is Toronto (93% of total searches to Ontario). The next most popular destinations are Ottawa (6%) and London (1%).

Top airline flying from Colorado to Ontario

 
Need help choosing which airline to fly with from Colorado 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 9554 reviews
6.3Food
7.8Crew
6.8Entertainment
7.3Boarding
7.0Comfort
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

Book cheap flights from Colorado to Ontario

Recent round-trip flight deals

20/8Wed
1 stopWestJet
10h 28mDEN-YUL
31/8Sun
1 stopWestJet
19h 54mYUL-DEN
C$ 338
22/7Tue
2 stopsWestJet
10h 18mDEN-YYZ
29/7Tue
1 stopWestJet
15h 02mYYZ-DEN
C$ 350
7/7Mon
1 stopAir Canada
11h 14mDEN-YOW
15/7Tue
1 stopAir Canada
6h 21mYOW-DEN
C$ 356
30/7Wed
1 stop
10h 09mDEN-YYZ
6/8Wed
direct
3h 40mYYZ-DEN
C$ 395
7/7Mon
1 stopAir Canada
11h 14mDEN-YOW
9/7Wed
1 stopAir Canada
6h 21mYOW-DEN
C$ 401
22/7Tue
2 stops
10h 18mDEN-YYZ
30/7Wed
1 stop
10h 18mYYZ-DEN
C$ 401
1/7Tue
1 stopUnited Airlines
6h 12mDEN-YOW
11/7Fri
1 stopUnited Airlines
10h 13mYOW-DEN
C$ 421
7/7Mon
1 stopUnited Airlines
7h 20mDEN-YOW
12/7Sat
1 stopUnited Airlines
7h 03mYOW-DEN
C$ 520
31/7Thu
1 stopDelta
7h 33mCOS-YUL
7/8Thu
1 stopDelta
10h 37mYUL-COS
C$ 561
20/8Wed
1 stopDelta
6h 48mCOS-YYZ
27/8Wed
2 stopsDelta
12h 21mYYZ-COS
C$ 578

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Recent one-way flight deals

24/6Tue
1 stopWestJet
8h 39mDEN-YYZ
C$ 124
24/6Tue
1 stopWestJet
10h 09mDEN-YYZ
C$ 133
1/7Tue
1 stopUnited Airlines
7h 17mDEN-YOW
C$ 174
3/7Thu
2 stopsUnited Airlines
16h 04mDEN-YOW
C$ 181
27/7Sun
1 stopAir Canada
7h 20mDEN-YOW
C$ 185
18/8Mon
3 stops
15h 33mDEN-YYZ
C$ 205
10/7Thu
1 stop
13h 49mDEN-YTZ
C$ 209
21/6Sat
directAir Canada
3h 10mDEN-YYZ
C$ 219
23/8Sat
1 stopDelta
6h 28mDEN-YUL
C$ 240
30/6Mon
1 stopDelta
10h 21mCOS-YUL
C$ 240

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Last minute flights from Colorado to Ontario

Last minute flight, train and bus deals

21/6Sat
directAir Canada
3h 13mDEN-YYZ
30/6Mon
multi-stopAir Canada
8h 20mYYZ-DEN
C$ 471
21/6Sat
directAir Canada
3h 13mDEN-YYZ
30/6Mon
directAir Canada
3h 40mYYZ-DEN
C$ 473
20/6Fri
multi-stopDelta
8h 23mDEN-YYZ
24/6Tue
multi-stopDelta
9h 22mYYZ-DEN
C$ 557
21/6Sat
multi-stopAmerican Airlines
8h 07mDEN-YYZ
22/6Sun
multi-stopAmerican Airlines
7h 02mYYZ-DEN
C$ 570
17/6Tue
multi-stopAmerican Airlines
13h 29mDEN-YYZ
17/7Thu
multi-stopAmerican Airlines
12h 12mYYZ-DEN
C$ 577
19/6Thu
multi-stopDelta
6h 26mDEN-YYZ
19/9Fri
multi-stopDelta
5h 32mYYZ-DEN
C$ 581
19/6Thu
multi-stop
22h 49mDEN-YYZ
22/6Sun
multi-stop
23h 01mYYZ-DEN
C$ 599
19/6Thu
multi-stop
22h 49mDEN-YYZ
21/6Sat
multi-stop
9h 56mYYZ-DEN
C$ 600
17/6Tue
multi-stopWestJet
10h 18mDEN-YYZ
17/7Thu
multi-stopWestJet
29h 27mYYZ-DEN
C$ 656
17/6Tue
multi-stopWestJet
15h 10mDEN-YOW
22/6Sun
multi-stopWestJet
31h 17mYOW-DEN
C$ 868

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Everything you need to know for your flight to Ontario

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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