Ontario

$54+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Apr 22 — Apr 291
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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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$162
(Mytrip)

One-way from

$54
(Kiwi.com)

Popular in

November

Cheapest in

March

Average price

$542

Good round-trip deal

$593 or less

Good one-way deal

$408 or less
Provider with most accurate pricing for Denver Intl-Toronto (YTO) flight deals.
Provider most trusted by Cheapflights users for Denver Intl-Toronto (YTO) flights.
From Colorado to Ontario
One-way flight from Colorado to Ontario
Highest demand for flights based on searches. 6% potential increase in price ($34 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in April 2025
Price to beat on a round-trip flight from Colorado to Ontario.
Price to beat on a one-way flight from Colorado to Ontario.

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 April 17, 2025.

This Mytrip deal was found by Cheapflights users on 4/17. 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.
Thu 5/227:40 pmDEN - YXU
1 stop7h 34mMultiple Airlines
Wed 5/286:15 amYXU - DEN
1 stop6h 15mMultiple Airlines
Deal found 4/17$162
This Trip.com deal was found by Cheapflights users on 4/17. 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.
Fri 5/307:40 pmDEN - YXU
1 stop7h 34mWestJet
Fri 6/68:00 pmYXU - DEN
1 stop17h 27mWestJet
Deal found 4/17$174
This oojo deal was found by Cheapflights users on 4/17. 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.
Thu 5/227:40 pmDEN - YKF
1 stop27h 06mWestJet
Thu 5/296:00 amYKF - DEN
1 stop14h 52mWestJet
Deal found 4/17$201
This United Airlines deal was found by Cheapflights users on 4/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/287:45 amDEN - YXU
1 stop5h 18mUnited Airlines
Sat 6/76:15 amYXU - DEN
1 stop7h 13mUnited Airlines
Deal found 4/17$202
This Kiwi.com deal was found by Cheapflights users on 4/17. 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.
Sat 5/312:15 pmDEN - YYZ
1 stop15h 59mWestJet
Sun 5/1110:25 pmYYZ - DEN
1 stop15h 02mWestJet
Deal found 4/17$202
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:05 pmDEN - YXU
2 stops12h 12mAir Canada
Fri 10/36:15 amYXU - DEN
1 stop7h 43mAir Canada
Deal found 4/17$207
This Kiwi.com deal was found by Cheapflights users on 4/17. 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.
Sat 5/241:33 pmDEN - YYZ
1 stop8h 39mMultiple Airlines
Sat 5/3110:25 pmYYZ - DEN
1 stop15h 02mMultiple Airlines
Deal found 4/17$219
This oojo deal was found by Cheapflights users on 4/17. 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.
Thu 5/297:40 pmDEN - YHM
1 stop27h 01mWestJet
Sun 6/16:00 amYHM - DEN
1 stop14h 52mWestJet
Deal found 4/17$230
This Trip.com deal was found by Cheapflights users on 4/17. 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.
Wed 6/412:15 pmDEN - YOW
1 stop10h 26mWestJet
Fri 7/187:15 pmYOW - DEN
1 stop18h 12mWestJet
Deal found 4/17$264
This Trip.com deal was found by Cheapflights users on 4/17. 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.
Wed 8/2712:15 pmDEN - YUL
1 stop10h 28mWestJet
Sun 8/315:30 pmYUL - DEN
1 stop19h 54mWestJet
Deal found 4/17$272
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/107:15 pmDEN - YOW
1 stop11h 18mAir Canada
Sun 7/276:00 amYOW - DEN
1 stop6h 21mAir Canada
Deal found 4/17$283
This Mytrip deal was found by Cheapflights users on 4/17. 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.
Thu 8/712:15 pmDEN - YUL
1 stop10h 28mMultiple Airlines
Sat 8/168:05 amYUL - DEN
Nonstop4h 16mMultiple Airlines
Deal found 4/17$287

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 April 17, 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

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 5/22

7:40 pm-5:14 am

1 stop7h 34m

London

Wed 5/28

6:15 am-10:30 am

1 stop6h 15m

$162

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 5/30

7:40 pm-5:14 am

1 stop7h 34m

London

Fri 6/6

8:00 pm-11:27 am

1 stop17h 27m

$174

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Thu 5/22

7:40 pm-12:46 am

1 stop27h 06m

Toronto Region of Waterloo Intl

Thu 5/29

6:00 am-6:52 pm

1 stop14h 52m

$201

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Wed 5/28

7:45 am-3:03 pm

1 stop5h 18m

London

Sat 6/7

6:15 am-11:28 am

1 stop7h 13m

$202

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 5/3

12:15 pm-6:14 am

1 stop15h 59m

Toronto Pearson Intl

Sun 5/11

10:25 pm-11:27 am

1 stop15h 02m

$202

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Tue 9/30

7:05 pm-9:17 am

2 stops12h 12m

London

Wed 10/8

6:15 am-11:58 am

1 stop7h 43m

$207

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 5/24

1:33 pm-12:12 am

1 stop8h 39m

Toronto Pearson Intl

Sat 5/31

10:25 pm-11:27 am

1 stop15h 02m

$219

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Thu 5/29

7:40 pm-12:41 am

1 stop27h 01m

Hamilton

Sun 6/1

6:00 am-6:52 pm

1 stop14h 52m

$230

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 6/4

12:15 pm-12:41 am

1 stop10h 26m

Ottawa

Fri 7/18

7:15 pm-11:27 am

1 stop18h 12m

$264

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Wed 8/27

12:15 pm-12:43 am

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

Sun 8/31

5:30 pm-11:24 am

1 stop19h 54m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 56 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 April 17, 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.

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 April 17, 2025.

The most flights from USCO to CAON are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (7 on average).

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 April 17, 2025.
Read through reviews of airlines operating flights from Colorado to Ontario, such as Delta, United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good
8.0
Very good

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $54. However, be on the lookout for offers from Air Canada and Delta, 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

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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.

Top 3 airlines flying from Colorado to Ontario

Discover the top 3 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$130Average$460FlexibilityNo cancel feeOn-time67%
DeltaCheapest$150Average$295FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$160Average$572FlexibilityNo cancel feeOn-time69%

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