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Cheap flights from Colorado to Ontario from C$ 225

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
15 Jul — 22 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Colorado to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Colorado to Ontario
Explore the most affordable flight options available from Colorado to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 June 2026.

Wed 16/95:56 p.m.
DEN
-
YTZ
1 stop18h 29m
Multiple Airlines
Sat 19/91:40 p.m.
YTZ
-
DEN
1 stop12h 49m
Multiple Airlines
Deal found 10/6C$ 464
Tue 6/106:25 a.m.
DEN
-
YTZ
1 stop9h 35m
Multiple Airlines
Sat 10/101:40 p.m.
YTZ
-
DEN
1 stop25h 20m
Multiple Airlines
Deal found 12/6C$ 482
Sat 5/95:15 p.m.
DEN
-
YTZ
1 stop19h 10m
Multiple Airlines
Tue 8/98:40 p.m.
YTZ
-
DEN
1 stop18h 20m
Multiple Airlines
Deal found 12/6C$ 492
Wed 22/78:52 p.m.
DEN
-
YYZ
1 stop21h 58m
Multiple Airlines
Tue 28/712:55 p.m.
YYZ
-
DEN
1 stop10h 46m
Multiple Airlines
Deal found 12/6C$ 498
Thu 1/106:25 a.m.
DEN
-
YTZ
1 stop6h 00m
Multiple Airlines
Sun 4/101:40 p.m.
YTZ
-
DEN
1 stop12h 49m
Multiple Airlines
Deal found 11/6C$ 501
Wed 29/78:52 p.m.
DEN
-
YYZ
1 stop21h 58m
Multiple Airlines
Tue 4/810:50 a.m.
YYZ
-
DEN
2 stops19h 00m
Multiple Airlines
Deal found 10/6C$ 515
Thu 20/86:00 a.m.
DEN
-
YYZ
1 stop12h 50m
Multiple Airlines
Mon 24/812:55 p.m.
YYZ
-
DEN
1 stop24h 37m
Multiple Airlines
Deal found 14/6C$ 522
Fri 31/710:15 a.m.
DEN
-
YYZ
1 stop8h 35m
Multiple Airlines
Tue 4/810:50 a.m.
YYZ
-
DEN
2 stops19h 00m
Multiple Airlines
Deal found 11/6C$ 523
Fri 18/95:56 p.m.
DEN
-
YTZ
1 stop13h 44m
Multiple Airlines
Mon 21/98:40 p.m.
YTZ
-
DEN
1 stop18h 20m
Multiple Airlines
Deal found 14/6C$ 526
Wed 12/88:52 p.m.
DEN
-
YYZ
1 stop21h 58m
Multiple Airlines
Tue 18/812:55 p.m.
YYZ
-
DEN
1 stop10h 54m
Multiple Airlines
Deal found 13/6C$ 530
Mon 14/95:56 p.m.
DEN
-
YTZ
1 stop13h 44m
Multiple Airlines
Fri 18/98:40 p.m.
YTZ
-
DEN
1 stop18h 20m
Multiple Airlines
Deal found 14/6C$ 533
Wed 19/83:50 p.m.
DEN
-
YYZ
1 stop27h 00m
Multiple Airlines
Sun 30/812:55 p.m.
YYZ
-
DEN
1 stop10h 54m
Multiple Airlines
Deal found 10/6C$ 537

Find flight deals from Colorado to Ontario

Keep the following information in mind while searching for Colorado to Ontario flight deals. Data was last updated 15 June 2026.

Round-trip from

C$ 464

One-way from

C$ 225

Popular in

February

Cheapest in

August

Average price

C$ 805

Good round-trip deal

C$ 233 or less

Good one-way deal

C$ 511 or less
16/9-19/9
  • 16/9-19/9
  • 2 total stops
  • 31h 18m total
  • Colorado to Ontario
Search Deals
2/9
  • 2/9
  • 3 total stops
  • 35h 34m total
  • Colorado to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Colorado to Ontario.
Search Deals
Price to beat on a one-way flight from Colorado to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 15 June 2026.
Use the filters below to find and compare flights from Colorado to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Fri 18/9

5:56 p.m.-9:40 a.m.

1 stop13h 44m

Toronto Island

Mon 21/9

8:40 p.m.-1:00 p.m.

1 stop18h 20m

C$ 526

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Mon 14/9

5:56 p.m.-9:40 a.m.

1 stop13h 44m

Toronto Island

Fri 18/9

10:05 a.m.-8:04 p.m.

2 stops11h 59m

C$ 628

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 24/7

12:15 p.m.-12:30 p.m.

2 stops22h 15m

Ottawa

Tue 28/7

6:15 p.m.-11:20 a.m.

2 stops19h 05m

C$ 660

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Sat 18/7

12:15 p.m.-7:50 p.m.

1 stop29h 35m

Toronto Region of Waterloo Intl

Tue 28/7

8:40 p.m.-11:20 a.m.

1 stop16h 40m

C$ 688

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Sun 2/8

12:15 p.m.-7:50 p.m.

1 stop29h 35m

Toronto Region of Waterloo Intl

Wed 5/8

8:40 p.m.-11:20 a.m.

1 stop16h 40m

C$ 688

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Sat 1/8

12:15 p.m.-7:50 p.m.

1 stop29h 35m

Toronto Region of Waterloo Intl

Tue 4/8

8:40 p.m.-11:20 a.m.

1 stop16h 40m

C$ 688

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Fri 24/7

12:15 p.m.-5:15 p.m.

1 stop27h 00m

Hamilton

Mon 27/7

6:10 p.m.-11:20 a.m.

1 stop19h 10m

C$ 695
Quickest round-trip

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Fri 2/10

10:02 a.m.-3:14 p.m.

Nonstop3h 12m

Toronto Pearson Intl

Mon 5/10

4:18 p.m.-5:56 p.m.

Nonstop3h 38m

C$ 719

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 14/9

10:02 a.m.-3:14 p.m.

Nonstop3h 12m

Toronto Pearson Intl

Fri 18/9

4:18 p.m.-5:56 p.m.

Nonstop3h 38m

C$ 719

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Tue 30/6

12:15 p.m.-7:50 p.m.

1 stop29h 35m

Toronto Region of Waterloo Intl

Sat 4/7

8:40 p.m.-11:20 a.m.

1 stop16h 40m

C$ 720

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Colorado to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Ontario

What is the cheapest month to book a flight from Colorado to Region of Ontario?

Currently, July is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of C$ 166). Flying from Colorado to Region of Ontario in May is currently the most expensive (average of C$ 341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CO to ON?

Find hourly flight availability from Colorado to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Region of Ontario as you normally would.

Weekly flight availability from Colorado to Region of Ontario

Explore weekly flight availability from Colorado to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 15 June 2026.

The most flights from USCO to CAON are scheduled on a Monday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Colorado to Region of Ontario?

How far ahead should I book a flight from Colorado to Region of Ontario?

To ensure you get the cheapest price possible for a flight from Colorado to Region of Ontario, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 15 June 2026.
Read reviews from past customers who have flown Air Canada from Colorado to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,194 reviews
Check prices

Comfort

7.1

Food

6.3

Overall

7.1

Boarding

7.3

Entertainment

6.8

Crew

7.8

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.
Air Canada
7.1
Good
11,194 reviews
Air Canada
7.1
Good
11,194 reviews
Check prices

Comfort

7.1

Food

6.3

Overall

7.1

Boarding

7.3

Entertainment

6.8

Crew

7.8

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado to Region of Ontario?

    Airlines like WestJet, United Airlines, and American Airlines fly from Colorado to Region of Ontario in about 3h 12m. The time it takes to get you to your destination can typically vary by up to 6h 18m. Airlines will cover a distance of 2111 km. This flight may include one or multiple stops.

  • Can I find deals for flights from Colorado to Ontario that include hotel bookings?

    Yes. In addition to deals on Colorado to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Ontario.

  • Can I find deals for business class flights from Colorado to Ontario?

    Yes. Cheapflights offers flight deals from Colorado to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to Region of Ontario?

    Currently, July is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of C$ 166). Flying from Colorado to Region of Ontario in May is currently the most expensive (average of C$ 341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Colorado to Ontario

Discover the top airline that operate flights from Colorado to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 15 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 291AverageC$ 856FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Colorado to Ontario?

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Can Cheapflights find flights from Colorado to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Colorado to Ontario flexibly with Cheapflights today.

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