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Ontario

$110+ Cheap flights from Colorado to Ontario

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
abr 2 — abr 91
qua 4/2
qua 4/9
1 adult, Economy
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Cheap flight deals from Colorado to Ontario

Keep the following information in mind while searching for Colorado to Ontario flight deals. Data was last updated março 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$244
(Kiwi.com)

One-way from

$110
(Kiwi.com)

Popular in

August

Cheapest in

March

Average price

$292

Good round-trip deal

$598 or less

Good one-way deal

$276 or less
Provider with most accurate pricing for Denver Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Toronto (YTO) flights.
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From Colorado to Ontario
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One-way flight from Colorado to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Colorado to Ontario.
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Price to beat on a one-way flight from Colorado to Ontario.
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Find flight deals from Colorado to Ontario

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 março 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 7/117:40 pmDEN - YYZ
1 stop8h 32mWestJet
qui 7/1710:00 amYYZ - DEN
1 stop10h 52mWestJet
Deal found 3/27$244
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 6/312:15 pmDEN - YUL
1 stop10h 28mWestJet
qui 6/266:45 amYUL - DEN
2 stops14h 07mWestJet
Deal found 3/27$268
This Trip.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 7/2412:15 pmDEN - YOW
1 stop10h 26mWestJet
dom 8/106:00 amYOW - DEN
1 stop14h 52mWestJet
Deal found 3/27$269
This Trip.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 8/2312:15 pmDEN - YKF
1 stop10h 31mWestJet
ter 8/267:45 pmYKF - DEN
1 stop17h 42mWestJet
Deal found 3/27$273
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/1412:15 pmDEN - YYZ
1 stop8h 39mMultiple Airlines
sáb 5/171:30 pmYYZ - DEN
2 stops22h 22mMultiple Airlines
Deal found 3/27$281
This Kiwi.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/1112:15 pmDEN - YUL
1 stop10h 28mMultiple Airlines
dom 5/187:00 amYUL - DEN
2 stops28h 57mMultiple Airlines
Deal found 3/26$305
This oojo deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/227:40 pmDEN - YHM
1 stop27h 01mWestJet
dom 5/256:00 amYHM - DEN
1 stop14h 52mWestJet
Deal found 3/26$320
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/227:40 pmDEN - YKF
2 stops31h 50mMultiple Airlines
dom 5/256:00 amYKF - DEN
1 stop14h 52mMultiple Airlines
Deal found 3/26$321
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 6/87:40 pmDEN - YHM
1 stop27h 01mMultiple Airlines
qui 6/127:15 pmYHM - DEN
1 stop25h 37mMultiple Airlines
Deal found 3/27$334
This Sun Country Air deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 9/2510:11 amDEN - YUL
1 stop24h 27mSun Country Air
dom 9/289:45 amYUL - DEN
1 stop7h 49mSun Country Air
Deal found 3/27$343
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/227:40 pmDEN - YTZ
2 stops18h 47mMultiple Airlines
dom 5/253:35 pmYTZ - DEN
2 stops21h 52mMultiple Airlines
Deal found 3/26$350
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/1512:15 pmDEN - YOW
3 stops30h 48mMultiple Airlines
seg 5/196:10 amYOW - DEN
2 stops31h 17mMultiple Airlines
Deal found 3/27$368

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 2,558,603 searches. Data last updated março 28, 2025.
Use the filters below to find and compare flights from Colorado to Ontario that are best for you.

Fly from

Colorado

Fly to

Ontario

Route

Depart

Return

Price

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

sex 7/11

7:40 pm-6:12 am

1 stop8h 32m

Toronto Pearson Intl

qui 7/17

10:00 am-6:52 pm

1 stop10h 52m

$244

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

ter 6/3

12:15 pm-12:43 am

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

qui 6/26

6:45 am-6:52 pm

2 stops14h 07m

$268

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

qui 7/24

12:15 pm-12:41 am

1 stop10h 26m

Ottawa

dom 8/10

6:00 am-6:52 pm

1 stop14h 52m

$269

DenverToronto

DEN - YKF

DENYKF

Denver Intl

sáb 8/23

12:15 pm-12:46 am

1 stop10h 31m

Toronto Region of Waterloo Intl

ter 8/26

7:45 pm-11:27 am

1 stop17h 42m

$273

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

qua 5/14

12:15 pm-10:54 pm

1 stop8h 39m

Toronto Pearson Intl

sáb 5/17

1:30 pm-9:52 am

2 stops22h 22m

$281

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

dom 5/11

12:15 pm-12:43 am

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

dom 5/18

7:00 am-9:57 am

2 stops28h 57m

$305

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

qui 5/22

7:40 pm-12:41 am

1 stop27h 01m

Hamilton

dom 5/25

6:00 am-6:52 pm

1 stop14h 52m

$320

DenverToronto

DEN - YKF

DENYKF

Denver Intl

qui 5/22

7:40 pm-5:30 am

2 stops31h 50m

Toronto Region of Waterloo Intl

dom 5/25

6:00 am-6:52 pm

1 stop14h 52m

$321

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

dom 6/8

7:40 pm-12:41 am

1 stop27h 01m

Hamilton

qui 6/12

7:15 pm-6:52 pm

1 stop25h 37m

$334

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

qui 5/22

7:40 pm-4:27 pm

2 stops18h 47m

Toronto Island

dom 5/25

3:35 pm-11:27 am

2 stops21h 52m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 53 results
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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, January is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of $243). Flying from Colorado to Region of Ontario in July is currently the most expensive (average of $359). 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 março 28, 2025.

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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 março 28, 2025.
Read through reviews of airlines operating flights from Colorado to Ontario, such as Alaska Airlines, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,798 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,897 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,603 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
WestJet
7.2
Good
2,785 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $110. However, be on the lookout for offers from Delta and Air Canada, as they are both options that can get you from Colorado to Region of Ontario for a low price.

  • 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, January is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of $243). Flying from Colorado to Region of Ontario in July is currently the most expensive (average of $359). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Colorado to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Colorado to Ontario

Discover the top 2 airlines 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 2,558,603 searches. Data last updated março 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$130Average$454FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$160Average$572FlexibilityNo cancel feeOn-time69%
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