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Colorado

$142+ Cheap flights from Ontario to Colorado

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheap flight deals from Ontario to Colorado

Keep the following information in mind while searching for Ontario to Colorado flight deals. Data was last updated April 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$236
(oojo)

One-way from

$142
(oojo)

Popular in

December

Cheapest in

October

Average price

$474

Good round-trip deal

$315 or less

Good one-way deal

$185 or less
Provider with most accurate pricing for Toronto (YTO)-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-Denver Intl flights.
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From Ontario to Colorado
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One-way flight from Ontario to Colorado
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Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Ontario to Colorado.
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Price to beat on a one-way flight from Ontario to Colorado.
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Find flight deals from Ontario to Colorado

Cheapest flights from Ontario to Colorado
Explore the most affordable flight options available from Ontario to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

This oojo deal was found by Cheapflights users on 4/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/296:00 amYHM - DEN
1 stop14h 52mWestJet
Wed 6/412:15 pmDEN - YHM
1 stop10h 26mWestJet
Deal found 4/27$236
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Fri 8/87:00 amYUL - DEN
1 stop13h 52mWestJet
Wed 8/1312:15 pmDEN - YUL
1 stop10h 28mWestJet
Deal found 4/28$275
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/173:30 pmYYZ - DEN
2 stops21h 57mWestJet
Thu 6/2612:15 pmDEN - YYZ
2 stops10h 18mWestJet
Deal found 4/29$282
This Trip.com deal was found by Cheapflights users on 4/27. 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.
Fri 7/117:15 pmYOW - DEN
1 stop18h 12mWestJet
Sun 7/137:40 pmDEN - YOW
1 stop9h 05mWestJet
Deal found 4/27$287
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Thu 5/293:35 pmYTZ - DEN
1 stop18h 27mMultiple Airlines
Mon 6/28:22 pmDEN - YTZ
1 stop14h 00mMultiple Airlines
Deal found 4/28$290
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Thu 5/2910:25 pmYYZ - DEN
1 stop15h 02mMultiple Airlines
Mon 6/24:19 pmDEN - YYZ
1 stop18h 11mMultiple Airlines
Deal found 4/29$302
This oojo deal was found by Cheapflights users on 4/29. 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.
Fri 8/156:00 amYKF - DEN
1 stop14h 52mWestJet
Mon 8/1812:15 pmDEN - YKF
1 stop10h 31mWestJet
Deal found 4/29$320
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 5/276:20 pmYYZ - COS
1 stop16h 31mUnited Airlines
Tue 6/32:35 pmCOS - YYZ
2 stops7h 23mUnited Airlines
Deal found 4/29$328
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1712:45 pmYUL - COS
1 stop10h 35mDelta
Mon 9/226:00 amCOS - YUL
2 stops13h 26mDelta
Deal found 4/28$336
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 6/18:05 amYUL - COS
1 stop15h 46mUnited Airlines
Sat 6/147:30 amCOS - YUL
1 stop13h 56mUnited Airlines
Deal found 4/29$350
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 7/122:30 pmYUL - DEN
2 stops12h 47mMultiple Airlines
Sat 7/1912:15 pmDEN - YUL
1 stop10h 28mMultiple Airlines
Deal found 4/28$366
This Mytrip deal was found by Cheapflights users on 4/27. 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.
Wed 6/48:20 amYHM - DEN
2 stops29h 07mMultiple Airlines
Mon 6/912:15 pmDEN - YHM
1 stop10h 26mMultiple Airlines
Deal found 4/27$376

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Colorado 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 29, 2025.
Use the filters below to find and compare flights from Ontario to Colorado that are best for you.

Fly from

Ontario

Fly to

Colorado

Route

Depart

Return

Price

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Thu 5/29

6:00 am-6:52 pm

1 stop14h 52m

Denver Intl

Wed 6/4

12:15 pm-12:41 am

1 stop10h 26m

$236

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Fri 8/8

7:00 am-6:52 pm

1 stop13h 52m

Denver Intl

Wed 8/13

12:15 pm-12:43 am

1 stop10h 28m

$275

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Tue 6/17

3:30 pm-11:27 am

2 stops21h 57m

Denver Intl

Thu 6/26

12:15 pm-12:33 am

2 stops10h 18m

$282

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 7/11

7:15 pm-11:27 am

1 stop18h 12m

Denver Intl

Sun 7/13

7:40 pm-6:45 am

1 stop9h 05m

$287

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Thu 5/29

3:35 pm-8:02 am

1 stop18h 27m

Denver Intl

Mon 6/2

8:22 pm-12:22 pm

1 stop14h 00m

$290

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 5/29

10:25 pm-11:27 am

1 stop15h 02m

Denver Intl

Mon 6/2

4:19 pm-12:30 pm

1 stop18h 11m

$302

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Tue 5/27

6:20 pm-8:51 am

1 stop16h 31m

Colorado Springs

Tue 6/3

2:35 pm-11:58 pm

2 stops7h 23m

$328

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Sat 8/30

7:45 am-5:13 pm

2 stops11h 28m

Colorado Springs

Sat 9/6

8:00 am-4:58 pm

1 stop6h 58m

$333

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Wed 9/17

12:45 pm-9:20 pm

1 stop10h 35m

Colorado Springs

Mon 9/22

6:00 am-9:26 pm

2 stops13h 26m

$336

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Sun 6/1

8:05 am-9:51 pm

1 stop15h 46m

Colorado Springs

Sat 6/14

7:30 am-11:26 pm

1 stop13h 56m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 55 results
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Best time to book a flight from Ontario to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Ontario 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 Ontario to Colorado

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

Currently, October is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of $197). Flying from Region of Ontario to Colorado in March is currently the most expensive (average of $278). 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 ON to CO?

Find hourly flight availability from Ontario to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

When flying from Region of Ontario to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to Colorado

Explore weekly flight availability from Ontario to Colorado. 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 29, 2025.

The most flights from CAON to USCO are scheduled on a Tuesday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Colorado by month

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

In terms of precipitation, rainfall in Colorado ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Colorado when rainfall is around 0.5 in.

Temperature in Colorado by month

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

If weather is an important factor for your trip to Colorado, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated April 29, 2025.
Read reviews from past customers who have flown Porter Airlines, Delta and United Airlines from Ontario to Colorado. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
285 reviews

Comfort

8.1

Food

7.6

Entertainment

7.0

Crew

8.8

Boarding

8.2

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Porter Airlines
8.0
Very good
285 reviews
Porter Airlines
8.0
Very good
285 reviews

Comfort

8.1

Food

7.6

Entertainment

7.0

Crew

8.8

Boarding

8.2

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Delta
8.0
Very good
7,936 reviews
Porter Airlines
8.0
Very good
285 reviews

Comfort

8.1

Food

7.6

Entertainment

7.0

Crew

8.8

Boarding

8.2

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
United Airlines
7.4
Good
8,696 reviews
Porter Airlines
8.0
Very good
285 reviews

Comfort

8.1

Food

7.6

Entertainment

7.0

Crew

8.8

Boarding

8.2

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
285 reviews

Comfort

8.1

Food

7.6

Entertainment

7.0

Crew

8.8

Boarding

8.2

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
WestJet
7.2
Good
2,826 reviews
Porter Airlines
8.0
Very good
285 reviews

Comfort

8.1

Food

7.6

Entertainment

7.0

Crew

8.8

Boarding

8.2

Overall

8.0

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Related info for your journey

Find useful and relevant information for your journey from Ontario to Colorado. 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 Region of Ontario to Colorado one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $142. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Region of Ontario to Colorado for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Colorado 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 Region of Ontario to Colorado?

    Currently, October is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of $197). Flying from Region of Ontario to Colorado in March is currently the most expensive (average of $278). 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 Ontario to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ontario to Colorado

Discover the top 3 airlines that operate flights from Ontario to Colorado. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$234Average$469FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$249Average$481FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$429Average$517FlexibilityNo cancel feeOn-time71%

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