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Cheap flights from Colorado to Ontario from C$ 179

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
28 Aug — 4 Sep1
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 29 July 2026.

Fri 11/910:44 a.m.
DEN
-
YTZ
2 stops24h 11m
Multiple Airlines
Wed 16/910:50 a.m.
YTZ
-
DEN
1 stop8h 26m
Multiple Airlines
Deal found 29/7C$ 489
Sat 12/910:44 a.m.
DEN
-
YTZ
2 stops24h 11m
Multiple Airlines
Sat 19/910:50 a.m.
YTZ
-
DEN
1 stop8h 26m
Multiple Airlines
Deal found 29/7C$ 503
Thu 8/1012:15 p.m.
DEN
-
YYZ
1 stop8h 30m
Multiple Airlines
Mon 12/104:45 p.m.
YYZ
-
DEN
1 stop7h 04m
Multiple Airlines
Deal found 26/7C$ 507
Sat 22/812:15 p.m.
DEN
-
YYZ
1 stop9h 55m
WestJet
Sat 29/810:20 p.m.
YYZ
-
DEN
2 stops15h 00m
WestJet
Deal found 26/7C$ 508
Fri 18/912:15 p.m.
DEN
-
YYZ
1 stop15h 30m
WestJet
Sun 20/910:25 p.m.
YYZ
-
DEN
1 stop14h 55m
WestJet
Deal found 26/7C$ 510
Mon 2/116:55 a.m.
DEN
-
YTZ
1 stop9h 20m
Multiple Airlines
Sat 7/111:10 p.m.
YTZ
-
DEN
1 stop10h 39m
Multiple Airlines
Deal found 29/7C$ 513
Thu 17/910:45 a.m.
DEN
-
YYZ
1 stop9h 10m
Multiple Airlines
Sun 20/910:25 p.m.
YYZ
-
DEN
1 stop14h 55m
Multiple Airlines
Deal found 26/7C$ 513
Wed 9/910:38 a.m.
DEN
-
YYZ
1 stop9h 17m
Multiple Airlines
Wed 16/94:45 p.m.
YYZ
-
DEN
1 stop26h 37m
Multiple Airlines
Deal found 29/7C$ 515
Tue 15/97:10 p.m.
DEN
-
YTZ
2 stops39h 45m
Multiple Airlines
Mon 21/910:50 a.m.
YTZ
-
DEN
1 stop11h 37m
Multiple Airlines
Deal found 28/7C$ 517
Wed 12/812:15 p.m.
DEN
-
YYZ
1 stop9h 55m
WestJet
Wed 19/810:20 p.m.
YYZ
-
DEN
2 stops15h 00m
WestJet
Deal found 25/7C$ 518
Fri 18/912:15 p.m.
DEN
-
YYZ
1 stop9h 55m
Multiple Airlines
Tue 22/97:00 a.m.
YYZ
-
DEN
2 stops13h 33m
Multiple Airlines
Deal found 26/7C$ 520
Thu 6/812:15 p.m.
DEN
-
YYZ
2 stops22h 30m
WestJet
Thu 13/810:25 p.m.
YYZ
-
DEN
1 stop14h 55m
WestJet
Deal found 25/7C$ 521

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 29 July 2026.

Round-trip from

C$ 507

One-way from

C$ 179

Popular in

February

Cheapest in

November

Average price

C$ 886

Good round-trip deal

C$ 365 or less

Good one-way deal

C$ 318 or less
8/10-12/10
  • 8/10-12/10
  • 2 total stops
  • 15h 34m total
  • Colorado to Ontario
Search Deals
24/8
  • 24/8
  • 1 total stop
  • 11h 24m total
  • Colorado to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 29 July 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

Thu 8/10

7:26 a.m.-5:20 p.m.

1 stop7h 54m

Toronto Island

Sun 18/10

10:50 a.m.-12:44 p.m.

1 stop27h 54m

C$ 572

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Fri 9/10

7:26 a.m.-5:20 p.m.

1 stop7h 54m

Toronto Island

Sun 18/10

10:50 a.m.-12:44 p.m.

1 stop27h 54m

C$ 572

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 13/8

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

1 stop29h 35m

London

Mon 17/8

5:55 p.m.-11:20 a.m.

1 stop19h 25m

C$ 597

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sun 27/9

11:23 a.m.-12:55 p.m.

1 stop23h 32m

Toronto Island

Thu 1/10

10:50 a.m.-9:49 p.m.

1 stop12h 59m

C$ 601

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Wed 9/9

7:50 p.m.-3:00 p.m.

2 stops17h 10m

Toronto Region of Waterloo Intl

Wed 16/9

8:40 p.m.-4:58 p.m.

2 stops22h 18m

C$ 638

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Thu 17/9

7:50 p.m.-7:50 p.m.

2 stops22h 00m

Toronto Region of Waterloo Intl

Fri 25/9

6:05 a.m.-11:08 p.m.

2 stops19h 03m

C$ 649

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Mon 7/9

12:15 p.m.-11:13 p.m.

1 stop8h 58m

Hamilton

Sun 13/9

6:05 a.m.-11:20 a.m.

3 stops31h 15m

C$ 655

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Sat 22/8

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

1 stop29h 35m

Toronto Region of Waterloo Intl

Sat 29/8

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

1 stop16h 40m

C$ 679

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Fri 25/9

12:15 p.m.-11:13 p.m.

1 stop8h 58m

Hamilton

Sun 27/9

6:55 p.m.-11:20 a.m.

1 stop18h 25m

C$ 700

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Sat 22/8

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

1 stop27h 00m

Hamilton

Sat 29/8

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

1 stop19h 10m

C$ 701

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of C$ 706). Flying from Colorado to Region of Ontario in February is currently the most expensive (average of C$ 966). 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 29 July 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 29 July 2026.

The most flights from USCO to CAON are scheduled on a Monday (10 on average). You will have fewer flight options on Sunday, 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?

Airfare is below average for this route at the moment.
Colorado to Region of Ontario flights typically cost between C$ 559 and C$ 890 in October.
The cheapest round-trip price found within the last 5 days was C$ 507 on Multiple Airlines (8 Oct-12 Oct).

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 23 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 29 July 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
11,404 reviews
Check prices

Overall

7.1

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Crew

7.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given
Air Canada
7.1
Good
11,404 reviews
Air Canada
7.1
Good
11,404 reviews
Check prices

Overall

7.1

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Crew

7.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given

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, American Airlines, and United Airlines fly from Colorado to Region of Ontario in about 7h 15m. The time it takes to get you to your destination can typically vary by up to 22h 20m. Airlines will cover a distance of 2638 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Colorado to Region of Ontario one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 205. Users have also found prices from C$ 233 and C$ 243 on United Airlines and Air Canada, respectively.

  • 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, October is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of C$ 706). Flying from Colorado to Region of Ontario in February is currently the most expensive (average of C$ 966). 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 29 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 293AverageC$ 867FlexibilityNo 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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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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