C$ 193 Find Cheap Flights from Ontario to Colorado

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Good to know

Low seasonJanuary
High seasonAugust
Cheapest flightC$ 193
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 25% lower on average.
Flight from Toronto Region of Waterloo Intl 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$ 426.

  • 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$ 946 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$ 430 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. 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$ 570.

  • 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$ 248 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$ 248.

  • 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$ 582 (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$ 748 and C$ 705 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 9h 03m, 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 34m.

  • 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 (0%). Searches for flights to Gunnison (0%), to Aspen (0%), and to Montrose (0%) are also popular.

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 8790 reviews
8.1Crew
6.6Food
7.3Comfort
7.0Entertainment
7.7Boarding
Airline reviews

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

4.0 OkayElora, May 2025BUR - DEN
Read more United Airlines reviews

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.

headphone jack didnt work for the first flight and not much variety

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

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.

Internet on both flights was sketchy. Thus in flight entertainment was non- existent on MN - Balrimote leg.

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

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

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

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.

Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.

Stuck in Phoenix for two days, not even a hotel voucher offered.

Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy

Book cheap flights from Ontario to Colorado

Recent round-trip flight deals

8/7Tue
1 stopWestJet
19h 57mYUL-DEN
15/7Tue
1 stopWestJet
10h 28mDEN-YUL
C$ 327
8/8Fri
1 stopWestJet
19h 57mYUL-DEN
11/8Mon
1 stopWestJet
10h 28mDEN-YUL
C$ 328
22/7Tue
1 stopWestJet
19h 57mYUL-DEN
29/7Tue
1 stopWestJet
10h 28mDEN-YUL
C$ 330
5/7Sat
1 stopUnited Airlines
7h 39mYOW-DEN
12/7Sat
1 stopUnited Airlines
7h 17mDEN-YOW
C$ 365
14/8Thu
1 stopUnited Airlines
15h 18mYOW-DEN
9/9Tue
1 stopUnited Airlines
6h 04mDEN-YOW
C$ 390
8/7Tue
1 stopLufthansa
8h 29mYOW-DEN
15/7Tue
2 stopsLufthansa
13h 12mDEN-YOW
C$ 392
1/8Fri
2 stops
15h 21mYYZ-DEN
3/8Sun
1 stop
10h 09mDEN-YYZ
C$ 414
9/7Wed
2 stops
18h 00mYYZ-DEN
16/7Wed
1 stop
8h 39mDEN-YYZ
C$ 417
24/8Sun
1 stopAir Canada
6h 21mYOW-DEN
28/8Thu
1 stopAir Canada
7h 20mDEN-YOW
C$ 422
8/7Tue
directAir Canada
4h 15mYUL-DEN
13/7Sun
directAir Canada
3h 46mDEN-YUL
C$ 432

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Recent one-way flight deals

29/7Tue
1 stopWestJet
17h 42mYKF-DEN
C$ 193
14/8Thu
1 stopWestJet
17h 42mYKF-DEN
C$ 204
26/7Sat
1 stopUnited Airlines
7h 01mYOW-DEN
C$ 220
27/7Sun
1 stopAir Canada
6h 21mYOW-DEN
C$ 223
27/9Sat
1 stop
15h 44mYYZ-DEN
C$ 226
27/7Sun
1 stopAir Canada
6h 21mYOW-DEN
C$ 232
27/9Sat
2 stops
23h 43mYYZ-DEN
C$ 241
17/6Tue
1 stopDelta
6h 35mYYZ-DEN
C$ 271
26/8Tue
1 stopDelta
6h 27mYYZ-COS
C$ 273
25/6Wed
1 stopUnited Airlines
15h 45mYUL-DEN
C$ 275

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Last minute flights from Ontario to Colorado

Last minute flight, train and bus deals

16/6Mon
multi-stopUnited Airlines
7h 05mYOW-DEN
8/7Tue
multi-stopUnited Airlines
7h 17mDEN-YOW
C$ 403
16/6Mon
multi-stopWestJet
20h 12mYOW-DEN
8/7Tue
multi-stopWestJet
10h 26mDEN-YOW
C$ 412
13/6Fri
directAir Canada
3h 45mYYZ-DEN
17/6Tue
directAir Canada
3h 11mDEN-YYZ
C$ 428
16/6Mon
directAir Canada
3h 45mYYZ-DEN
21/6Sat
directAir Canada
3h 13mDEN-YYZ
C$ 436
16/6Mon
multi-stopWestJet
31h 17mYOW-DEN
8/7Tue
multi-stopWestJet
10h 26mDEN-YOW
C$ 440
13/6Fri
multi-stopAmerican Airlines
10h 53mYYZ-DEN
17/6Tue
multi-stopAmerican Airlines
5h 55mDEN-YYZ
C$ 462
13/6Fri
multi-stopDelta
8h 08mYYZ-DEN
17/6Tue
multi-stopDelta
6h 26mDEN-YYZ
C$ 463
13/6Fri
multi-stopAmerican Airlines
8h 29mYYZ-DEN
21/6Sat
multi-stopAmerican Airlines
8h 19mDEN-YYZ
C$ 465
13/6Fri
multi-stopUnited Airlines
7h 00mYOW-DEN
13/6Fri
multi-stopUnited Airlines
8h 08mDEN-YOW
C$ 499
13/6Fri
multi-stopDelta
7h 56mYYZ-DEN
15/6Sun
multi-stopDelta
9h 14mDEN-YYZ
C$ 530

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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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