C$ 230 Find Cheap Flights from Ontario to Colorado

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Low seasonJanuary
High seasonAugust
Cheapest flightC$ 230
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 27% lower on average.
Flight from Toronto Island to Denver

Flights from Ontario to Colorado: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Ontario to Colorado 
F.Flew with United AirlinesYYZ-DENAug 2024
Make sure to check the airline delay flights rate and if you have important commitments choose another airline.
JoshuaFlew with Air CanadaYYZ-DENApr 2024
Toronto's customs was one of the faster experiences I've had. They opened four more lanes to expedite the process when the lane got too long, to ensure we would all get through within around 15 minutes. The public transportation within the city is also top notch, in my opinion.

FAQs for booking flights from Ontario to Colorado

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

    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 Ontario to Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Colorado 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 Ontario to Colorado?

    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 Ontario to Colorado 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 Ontario to Colorado?

    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 Ontario to Colorado 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 Colorado?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Colorado is Denver Intl Airport (DEN), with an average flight price of C$ 471.

  • What is the cheapest day to fly to Colorado?

    Based on KAYAK data, the cheapest day to fly to Colorado is Friday when round-trip tickets can be as cheap as C$ 711. On the other hand, the most expensive day to fly is Monday, when round-trip prices are C$ 966 on average.

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

    The cheapest time of day to fly to Colorado is generally in the afternoon, when round-trip flights cost C$ 431 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 573.

  • What is the cheapest flight to Colorado?

    The cheapest ticket to Colorado from Ontario found in the last 72 hours was to Denver, at C$ 320 round-trip. The most popular route is Toronto Pearson Intl Airport (YYZ) to Denver (DEN) and the cheapest round-trip airline ticket found on this route in the last 72 hours was C$ 320.

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

    The cheapest month for flights from Ontario to Colorado is September, when tickets cost C$ 581 (return) on average. On the other hand, the most expensive months are December and February, when the average cost of round-trip tickets is C$ 744 and C$ 706 respectively.

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

    To get a below-average price on the flight from Ontario to Colorado, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

  • How long is the flight to Colorado?

    An average direct flight from Ontario to Colorado takes 13h 27m, covering a distance of 3730 km. The shortest route is Toronto Pearson Intl Airport (YYZ) to Denver (DEN) with an average flight time of 3h 40m.

  • What are the most popular destinations in Colorado?

    Based on KAYAK flight searches, the most popular destination is Denver (95% of total searches to Colorado). The next most popular destinations are Colorado Springs (3%) and Vail (1%). Searches for flights to Aspen (1%), to Gunnison (0%), and to Montrose (0%) are also popular.

Reviews of the top 4 airlines serving from Ontario to Colorado

 
Need help choosing which airline to fly with from Ontario to Colorado? 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 8849 reviews
7.3Comfort
7.0Entertainment
7.7Boarding
6.6Food
8.1Crew
Airline reviews

Very rough getting into denver. my kid threw up it was so rough.

4.0 OkayKristin, Jun 2025DSM - DEN
Read more United Airlines reviews

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

Generally good. However. The flight left 30 mins behind schedule with no reason given.

Flight delayed, missed my pick-up had to Uber, plus missed dinner and medication, so sad!

WestJet canceled my booking, replaced it with a booking that didn't work (departing from cruise ship), and didn't offer any flights that did work. Their only option was for me to cancel and go to another airline for more money. Which I did.

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

The seats are totally uncomfortable making the flight less than pleasant. The cookies & pretzels were terrible!!!

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

The small prop plane was crowded and the overhead luggage storage is a smaller than on the jets. Other than that, the crew was good, the flight was on time and the landing was smooth.

There was a medical emergency that the crew handled very well. There was no “entertainment” of any sort-no movie/music/whatever. Food was typical of airlines: mediocre.

Late departure, so I missed connection in Detroit. But Delta gave me a great hotel & breakfast. Just sorry I could not get anything from my checked baggage.

Crew was friendly. Lost our luggage and told us it’d be in later in the evening of the day we returned. It was not. Still after 5 days have not received it.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

This was an excellent experience for a very short flight.

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

flight landed late almost 1.00hr and we 4 passengers missed our connected flight to indianapolis, we need to get the hotel and taxi for the next day flight to home in indianapolis, cost us $ 300 more

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

Flight was late. Missed connecting in Denver. My new flight is more than 24 hours later and I have no room, vouchers, or compensation, and might also be bumped from the one tomorrow.

This was one of the first frontier airline flights this spring that wasn't delayed. It actually left on time. Some of the flight crew did not look happy, they didn't smile when the passengers were boarding or getting off the plane, and the passengers initiated greetings, not the staff. To me this was an odd experience to have with any flight/airline. I had a bad experience booking this flight. The price didn't solidify until late hours into the night. Ever time I purchased the ticket, I either received a denial email or an error because the price has changed, but it was never reflected on the flyfrontier or kayak websites until way after midnight on the date of travel. This caused me anxiety and irritation with the websites. Then I noticed a mishap with my name on my voucher as I went to check in, it was incorrect. When I proceeded to correct it, Frontier had no easy, let alone free, way to remedy it. I couldn't correct my name without a $75 charge, I couldn't cancel my voucher to repurchase it with the correct name without a $100 charge, because it was too close to departure. Then calling frontier was nearly impossible to remedy the situation with a human. It's already difficult to want to choose frontier because of all the upcharges, but you feel kinda trapped into doing so because it's the more affordable airline.

Our flight was cancelled. They could do nothing to help us get another flight that was timely. Because the first leg was cancelled we were unable to get to our connection. We had to book on an entirely different airline for today. So we spent more money, lost a day of vacation and will never fly Frontier again, so the 'we are sorry, here is $100 credit' is a joke since we won't be flying on Frontier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

The plane failed preflight inspection, so we sat there for 90 mins while they tried to fix it. Ultimately, everything was remedied and we made our connecting flight; instead of a 2 hour layover at the airport, we spent it waiting on the plane.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

Book cheap flights from Ontario to Colorado

Recent round-trip flight deals

24/8Sun
1 stopWestJet
19h 57mYUL-DEN
31/8Sun
1 stopWestJet
10h 28mDEN-YUL
C$ 395
27/7Sun
1 stopAir Canada
6h 21mYOW-DEN
3/8Sun
1 stopAir Canada
7h 20mDEN-YOW
C$ 416
13/8Wed
1 stopAir Canada
6h 21mYOW-DEN
20/8Wed
1 stopAir Canada
7h 20mDEN-YOW
C$ 419
24/8Sun
2 stopsWestJet
30h 42mYUL-DEN
31/8Sun
1 stopWestJet
10h 28mDEN-YUL
C$ 424
14/8Thu
1 stopUnited Airlines
7h 01mYOW-DEN
9/9Tue
1 stopUnited Airlines
8h 17mDEN-YOW
C$ 445
14/8Thu
1 stopUnited Airlines
8h 13mYOW-DEN
9/9Tue
1 stopUnited Airlines
7h 21mDEN-YOW
C$ 446
18/9Thu
1 stopDelta
10h 35mYUL-COS
22/9Mon
2 stopsDelta
15h 49mCOS-YUL
C$ 528
18/9Thu
1 stopAmerican Airlines
9h 55mYUL-COS
22/9Mon
1 stopAmerican Airlines
19h 33mCOS-YUL
C$ 539
6/8Wed
1 stopDelta
5h 39mYUL-COS
10/8Sun
1 stopDelta
9h 54mCOS-YUL
C$ 561
30/9Tue
1 stopAmerican Airlines
17h 38mYUL-DEN
22/10Wed
1 stopAmerican Airlines
19h 36mDEN-YUL
C$ 585

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Recent one-way flight deals

11/8Mon
1 stop
8h 24mYTZ-DEN
C$ 230
29/7Tue
1 stopWestJet
17h 42mYKF-DEN
C$ 238
10/7Thu
1 stopAir Canada
6h 21mYOW-DEN
C$ 238
8/7Tue
1 stopAir Canada
7h 05mYOW-DEN
C$ 246
7/7Mon
1 stopUnited Airlines
7h 07mYOW-DEN
C$ 252
8/7Tue
2 stopsUnited Airlines
11h 22mYOW-DEN
C$ 261
23/10Thu
2 stopsDelta
13h 00mYYZ-COS
C$ 308
26/8Tue
1 stopDelta
5h 56mYYZ-COS
C$ 312
7/10Tue
1 stopAmerican Airlines
16h 53mYUL-DEN
C$ 320
24/7Thu
2 stopsAmerican Airlines
18h 29mYYZ-DEN
C$ 341

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Last minute flights from Ontario to Colorado

Last minute flight, train and bus deals

4/7Fri
multi-stop
23h 53mYYZ-DEN
12/7Sat
multi-stop
21h 24mDEN-YYZ
C$ 746
3/7Thu
multi-stop
49h 03mYYZ-DEN
10/7Thu
multi-stop
13h 41mDEN-YYZ
C$ 759
3/7Thu
multi-stopWestJet
28h 27mYYZ-DEN
21/7Mon
multi-stopWestJet
10h 18mDEN-YYZ
C$ 888
3/7Thu
multi-stopWestJet
27h 04mYYZ-DEN
21/7Mon
multi-stopWestJet
10h 18mDEN-YYZ
C$ 911
2/7Wed
multi-stopUnited Airlines
7h 57mYOW-DEN
8/7Tue
multi-stopUnited Airlines
9h 06mDEN-YOW
C$ 922
3/7Thu
multi-stopAir Canada
12h 05mYOW-DEN
8/7Tue
multi-stopAir Canada
10h 31mDEN-YOW
C$ 936
3/7Thu
multi-stopDelta
7h 09mYYZ-DEN
20/7Sun
multi-stopDelta
7h 20mDEN-YYZ
C$ 953
3/7Thu
multi-stopDelta
7h 09mYYZ-DEN
20/7Sun
multi-stopDelta
7h 20mDEN-YYZ
C$ 955
3/7Thu
multi-stopAir Canada
12h 05mYOW-DEN
8/7Tue
multi-stopAir Canada
11h 30mDEN-YOW
C$ 958
3/7Thu
multi-stopUnited Airlines
17h 23mYYZ-DEN
21/7Mon
directUnited Airlines
3h 15mDEN-YYZ
C$ 969

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Everything you need to know for your flight to Colorado

Cabin class types available on flights to Ontario

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

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