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$120+ Cheap flights from Ontario to Denver (DEN)

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
janv. 26 — févr. 21
dim. 1/26
dim. 2/2
1 adult, Economy
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Cheap flight deals from Ontario to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (CAON) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated janvier 21, 2025.

Round-trip from

$281
(Kiwi.com)

One-way from

$120
(Kiwi.com)

Good round-trip deal

$372 or less

Good one-way deal

$231 or less
From Ontario to Denver Intl
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One-way flight from Ontario to Denver Intl
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Price to beat on a round-trip flight from Ontario to Denver Intl.
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Price to beat on a one-way flight from Ontario to Denver Intl.
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Find flight deals from Ontario to Denver

Cheapest flights from Ontario to Denver
Explore the most affordable flight options available from Ontario to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 21, 2025.

This Kiwi.com deal was found by Cheapflights users on 1/21. 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.
mar. 2/182:50 pmYOW - DEN
2 stops15h 06mMultiple Airlines
mar. 2/2511:59 pmDEN - YOW
1 stop12h 21mMultiple Airlines
Deal found 1/21$281
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
mer. 2/1911:20 amYTZ - DEN
1 stop10h 52mMultiple Airlines
ven. 2/2110:44 pmDEN - YTZ
2 stops19h 41mMultiple Airlines
Deal found 1/20$295
This Kiwi.com deal was found by Cheapflights users on 1/21. 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.
jeu. 2/139:45 amYYZ - DEN
1 stop10h 21mMultiple Airlines
mer. 2/195:14 pmDEN - YYZ
1 stop11h 29mMultiple Airlines
Deal found 1/21$299
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
mer. 3/52:35 pmYUL - DEN
2 stops15h 21mMultiple Airlines
mer. 3/1210:44 pmDEN - YUL
1 stop15h 51mMultiple Airlines
Deal found 1/20$327
This Gotogate deal was found by Cheapflights users on 1/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 6/275:30 pmYUL - DEN
1 stop19h 57mWestJet
sam. 7/512:15 pmDEN - YUL
1 stop10h 28mWestJet
Deal found 1/20$358
This American Airlines deal was found by Cheapflights users on 1/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/152:30 pmYUL - DEN
1 stop8h 41mAmerican Airlines
mar. 4/1511:59 pmDEN - YUL
1 stop11h 40mAmerican Airlines
Deal found 1/21$388
This United Airlines deal was found by Cheapflights users on 1/21. 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.
mar. 3/42:45 pmYYZ - DEN
Nonstop3h 53mUnited Airlines
mar. 3/115:40 pmDEN - YYZ
Nonstop3h 12mUnited Airlines
Deal found 1/21$414
This Air Canada deal was found by Cheapflights users on 1/21. 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.
lun. 2/242:45 pmYYZ - DEN
Nonstop3h 53mAir Canada
jeu. 2/275:25 pmDEN - YYZ
Nonstop3h 12mAir Canada
Deal found 1/21$415
This Delta deal was found by Cheapflights users on 1/20. 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.
ven. 4/115:15 pmYYZ - DEN
1 stop6h 23mDelta
lun. 4/1411:40 amDEN - YYZ
1 stop4h 43mDelta
Deal found 1/20$434
This American Airlines deal was found by Cheapflights users on 1/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/2211:35 amYYZ - DEN
1 stop5h 53mAmerican Airlines
lun. 4/285:00 amDEN - YYZ
1 stop15h 50mAmerican Airlines
Deal found 1/21$439
This Kissandfly.com deal was found by Cheapflights users on 1/21. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 2/131:20 pmYYZ - DEN
2 stops22h 41mFrontier
mer. 2/1911:57 amDEN - YYZ
2 stops20h 01mFrontier
Deal found 1/21$444
This Trip.com deal was found by Cheapflights users on 1/20. 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.
ven. 6/136:00 amYHM - DEN
1 stop14h 52mWestJet
dim. 6/1512:15 pmDEN - YHM
1 stop10h 26mWestJet
Deal found 1/20$460

Find flights from Ontario to Denver within your budget

Customize your flight search to find flights from Ontario to Denver 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 janvier 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

mar. 2/18

2:50 pm-3:56 am

2 stops15h 06m

Denver Intl

mar. 2/25

11:59 pm-2:20 pm

1 stop12h 21m

$281

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

lun. 4/14

8:00 pm-3:56 am

1 stop9h 56m

Denver Intl

mar. 4/15

12:29 am-11:45 am

1 stop9h 16m

$286

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

mer. 2/19

11:20 am-8:12 pm

1 stop10h 52m

Denver Intl

ven. 2/21

10:44 pm-8:25 pm

2 stops19h 41m

$295

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

mer. 3/5

2:35 pm-3:56 am

2 stops15h 21m

Denver Intl

mer. 3/12

10:44 pm-4:35 pm

1 stop15h 51m

$327

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

mar. 4/15

2:30 pm-9:11 pm

1 stop8h 41m

Denver Intl

mar. 4/15

11:59 pm-1:39 pm

1 stop11h 40m

$388

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

ven. 5/23

5:30 pm-11:27 am

1 stop19h 57m

Denver Intl

ven. 5/30

12:15 pm-12:43 am

1 stop10h 28m

$390

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

lun. 2/17

4:10 pm-6:15 pm

Nonstop4h 05m

Denver Intl

lun. 2/24

5:25 pm-10:37 pm

Nonstop3h 12m

$416

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

mar. 2/18

4:10 pm-6:15 pm

Nonstop4h 05m

Denver Intl

mar. 2/25

11:15 am-4:27 pm

Nonstop3h 12m

$417

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

mar. 2/11

7:55 am-4:34 pm

1 stop10h 39m

Denver Intl

lun. 2/17

6:05 am-1:44 pm

1 stop5h 39m

$431

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

lun. 2/10

4:10 pm-6:12 pm

Nonstop4h 02m

Denver Intl

dim. 2/16

5:25 pm-10:37 pm

Nonstop3h 12m

$438

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 48 results
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Best time to book a flight from Ontario to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver 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.

Travel insights for flights from Ontario to Denver

Get recent, data-driven insights about flights from Ontario to Denver including ideal travel times, pricing trends, and more.

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

Currently, October is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of $197). Flying from Region of Ontario to Denver 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 DEN?

Find hourly flight availability from Ontario to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated janvier 21, 2025.

When flying from Region of Ontario to Denver, 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 Denver

Explore weekly flight availability from Ontario to Denver. 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 janvier 21, 2025.

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

Rainfall in Denver by month

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

In terms of precipitation, rainfall in Denver 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 Denver when rainfall is around 0.5 in.

Temperature in Denver by month

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

If weather is an important factor for your trip to Denver, 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 Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated janvier 21, 2025.
Read reviews from past customers who have flown United Airlines, Air Canada and Alaska Airlines from Ontario to Denver. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Crew

8.5

Food

7.1

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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
9,706 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Crew

8.5

Food

7.1

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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
8,521 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Crew

8.5

Food

7.1

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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
8,985 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Crew

8.5

Food

7.1

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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

Brussels Airlines
7.4
Good
349 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Comfort

7.9

Crew

8.5

Food

7.1

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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
9,706 reviews

Comfort

7.9

Crew

8.5

Food

7.1

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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 Ontario to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Denver from Ontario?

    For a flight from Ontario to Denver, you will be flying into Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city.

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

    $203 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on WestJet and American Airlines, with prices starting from $225 and $226, respectively.

  • What are the most popular routes from Region of Ontario to Denver?

    While some choose either Montreal Pierre Elliott Trudeau Intl - Denver Intl or Toronto Island - Denver Intl, Toronto Pearson Intl - Denver Intl is the most popular route from Region of Ontario to Denver.

  • What are the most reliable airlines from Region of Ontario to Denver?

    The top 3 most reliable airlines when flying from Region of Ontario to Denver are Air Canada (72%), United Airlines (72%) and Austrian Airlines (68%).

  • What are the cheapest flights from Region of Ontario to Denver?

    Looking for the cheapest flight from Region of Ontario to Denver? While on average our users pay $789, our data indicates the cheapest price to be $167. The most popular route (Toronto Pearson Intl - Denver Intl), is priced around $205.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Denver 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 Denver?

    Currently, October is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of $197). Flying from Region of Ontario to Denver 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Keystone
Westminster
Black Hawk
Winter Park
Dillon
Lakewood
Broomfield
Silverthorne
Golden
Brighton
Frisco
Wheat Ridge
Grand Lake
Idaho Springs
Greeley
Central City
Copper Mountain
Longmont
Thornton
Limon

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Alternative routes for Ontario to Denver

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

Discover the top 2 airlines that operate flights from Ontario to Denver. 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 janvier 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$234Average$473FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$254Average$485FlexibilityNo cancel feeOn-time67%
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