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$84+ Cheap flights from Denver (DEN) 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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Cheap flight deals from Denver to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Ontario (CAON). 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 enero 21, 2025.

Round-trip from

$248
(Kiwi.com)

One-way from

$84
(Kiwi.com)

Good round-trip deal

$567 or less

Good one-way deal

$332 or less
From Denver Intl to Ontario
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One-way flight from Denver Intl to Ontario
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Price to beat on a round-trip flight from Denver Intl to Ontario.
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Price to beat on a one-way flight from Denver Intl to Ontario.
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Find flight deals from Denver to Ontario

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

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.
lun. 2/2410:44 pmDEN - YYZ
2 stops20h 47mMultiple Airlines
vie. 2/288:00 pmYYZ - DEN
1 stop9h 56mMultiple Airlines
Deal found 1/20$248
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
mié. 2/268:55 pmDEN - YTZ
1 stop16h 52mMultiple Airlines
dom. 3/23:50 pmYTZ - DEN
1 stop18h 42mMultiple Airlines
Deal found 1/19$315
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.
vie. 2/2110:44 pmDEN - YUL
1 stop15h 51mMultiple Airlines
lun. 2/246:45 amYUL - DEN
2 stops28h 37mMultiple Airlines
Deal found 1/20$318
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.
mar. 3/410:44 pmDEN - YOW
1 stop16h 01mMultiple Airlines
mar. 3/118:00 amYOW - DEN
2 stops21h 56mMultiple Airlines
Deal found 1/20$323
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/187:00 amDEN - YYZ
1 stop29h 55mAlaska Airlines
mar. 2/254:20 pmYYZ - DEN
1 stop9h 09mAlaska Airlines
Deal found 1/20$386
This Sun Country Air deal was found by Cheapflights users on 1/19. 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.
dom. 7/1310:14 amDEN - YYZ
1 stop5h 16mSun Country Air
dom. 8/36:36 pmYYZ - DEN
1 stop16h 43mSun Country Air
Deal found 1/19$415
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/512:15 pmDEN - YUL
1 stop10h 28mWestJet
dom. 6/87:00 amYUL - DEN
1 stop13h 52mWestJet
Deal found 1/21$431
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/45:26 pmDEN - YUL
1 stop16h 14mAmerican Airlines
sáb. 4/53:40 pmYUL - DEN
1 stop18h 35mAmerican Airlines
Deal found 1/20$462
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/512:15 pmDEN - YKF
1 stop10h 31mWestJet
dom. 6/86:00 amYKF - DEN
1 stop14h 52mWestJet
Deal found 1/21$467
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/512:15 pmDEN - YHM
1 stop10h 26mWestJet
dom. 6/86:00 amYHM - DEN
1 stop14h 52mWestJet
Deal found 1/21$469
This Kissandfly.com deal was found by Cheapflights users on 1/19. 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.
dom. 2/96:29 amDEN - YUL
2 stops14h 01mPorter Airlines
sáb. 2/1512:55 pmYUL - DEN
2 stops12h 01mPorter Airlines
Deal found 1/19$472
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.
jue. 2/136:00 pmDEN - YYZ
1 stop10h 52mAir Canada
dom. 2/162:45 pmYYZ - DEN
Nonstop3h 53mAir Canada
Deal found 1/20$480

Find flights from Denver to Ontario within your budget

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

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

lun. 2/24

10:44 pm-9:31 pm

2 stops20h 47m

Toronto Pearson Intl

vie. 2/28

8:00 pm-3:56 am

1 stop9h 56m

$248

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

mié. 2/26

8:55 pm-3:47 pm

1 stop16h 52m

Toronto Island

dom. 3/2

3:50 pm-8:32 am

1 stop18h 42m

$315

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

vie. 2/21

10:44 pm-4:35 pm

1 stop15h 51m

Montreal Pierre Elliott Trudeau Intl

lun. 2/24

6:45 am-9:22 am

2 stops28h 37m

$318

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

mar. 3/4

10:44 pm-4:45 pm

1 stop16h 01m

Ottawa

mar. 3/11

8:00 am-3:56 am

2 stops21h 56m

$323

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

mar. 2/18

7:00 am-2:55 pm

1 stop29h 55m

Toronto Pearson Intl

mar. 2/25

4:20 pm-11:29 pm

1 stop9h 09m

$386

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

dom. 7/13

10:14 am-5:30 pm

1 stop5h 16m

Toronto Pearson Intl

dom. 8/3

6:36 pm-9:19 am

1 stop16h 43m

$415

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

jue. 6/5

12:15 pm-12:43 am

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

dom. 6/8

7:00 am-6:52 pm

1 stop13h 52m

$431

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

vie. 4/4

5:26 pm-11:40 am

1 stop16h 14m

Montreal Pierre Elliott Trudeau Intl

sáb. 4/5

3:40 pm-8:15 am

1 stop18h 35m

$462

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

dom. 2/9

6:29 am-10:30 pm

2 stops14h 01m

Montreal Pierre Elliott Trudeau Intl

sáb. 2/15

12:55 pm-10:56 pm

2 stops12h 01m

$472

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

jue. 2/13

6:00 pm-6:52 am

1 stop10h 52m

Toronto Pearson Intl

dom. 2/16

2:45 pm-4:38 pm

Nonstop3h 53m

$480

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 53 results
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Best time to book a flight from Denver to Ontario

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

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

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

Currently, January is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of $243). Flying from Denver 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 DEN to ON?

Find hourly flight availability from Denver 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 enero 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Region of Ontario as you normally would.

Weekly flight availability from Denver to Region of Ontario

Explore weekly flight availability from Denver 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 enero 21, 2025.

The most flights from DEN to CAON 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 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 enero 21, 2025.
To help decide which airline to fly from Denver to Ontario, see what other customers have to say about American Airlines, Air Canada 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
9,706 reviews

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

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

Porter Airlines
7.9
Good
277 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

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 Denver to Ontario. 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 from for flights from Denver to Ontario?

    If you book a flight to Ontario from Denver, you will be flying from Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver.

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

    $188 is the cheapest one-way deal found within the past few days, from Sun Country Air. You may also be able to find cheap deals on WestJet and American Airlines, with prices starting from $203 and $223, respectively.

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

    The most popular route from Denver to Region of Ontario is Denver Intl - Montreal Pierre Elliott Trudeau Intl. You may also consider Denver Intl - Toronto Pearson Intl or Denver Intl - Toronto Island.

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

    The top 3 most reliable airlines when flying from Denver to Region of Ontario are United Airlines (73%), Austrian Airlines (58%) and Air Canada (55%).

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

    Looking for the cheapest flight from Denver to Region of Ontario? While on average our users pay $1,116, our data indicates the cheapest price to be $246. The most popular route (Denver Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $318.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of $243). Flying from Denver 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 Denver to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Denver to Calgary flights
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Hayden to Calgary flights
Montrose to Calgary flights
Denver to Terrace flights
Denver to Campbell River flights
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Colorado Springs to Victoria flights
Denver to Smithers flights
Colorado Springs to Québec City flights
Aspen to Vancouver Intl flights
Colorado Springs to Winnipeg flights
Aspen to Halifax flights
Montrose to Vancouver Intl flights

Top 2 airlines flying from Denver to Ontario

Discover the top 2 airlines that operate flights from Denver 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 enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$200Average$533FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$235Average$548FlexibilityNo cancel feeOn-time69%
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