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Ontario

$112+ 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
1 adult, Economy
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Cheap flight deals from Denver to Ontario

Keep the following information in mind while searching for Denver to Ontario flight deals. Data was last updated November 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$321
(Kiwi.com)

One-way from

$112
(Kiwi.com)

Popular in

November

Cheapest in

March

Average price

$683

Good round-trip deal

$554 or less

Good one-way deal

$263 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 Denver Intl to Ontario
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One-way flight from Denver Intl to Ontario
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Highest demand for flights based on searches. 15% potential increase in price ($85 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 10, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/8. 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 11/2910:08 amDEN - YYZ
2 stops24h 20mMultiple Airlines
Fri 12/59:45 amYYZ - DEN
1 stop15h 11mMultiple Airlines
Deal found 11/8$321
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 12/134:25 pmDEN - YUL
1 stop22h 00mMultiple Airlines
Wed 1/74:35 pmYUL - DEN
1 stop17h 15mMultiple Airlines
Deal found 11/8$322
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 12/126:00 amDEN - YYZ
2 stops12h 32mMultiple Airlines
Sat 12/137:55 pmYYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 11/8$322
This Kiwi.com deal was found by Cheapflights users on 11/9. 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.
Sun 11/3011:59 pmDEN - YYZ
1 stop15h 54mMultiple Airlines
Sat 12/63:15 pmYYZ - DEN
1 stop12h 08mMultiple Airlines
Deal found 11/9$327
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 12/48:45 pmDEN - YTZ
1 stop14h 57mMultiple Airlines
Sun 12/79:15 amYTZ - DEN
1 stop25h 41mMultiple Airlines
Deal found 11/9$333
This Kiwi.com deal was found by Cheapflights users on 11/9. 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.
Sun 12/711:59 pmDEN - YYZ
1 stop9h 44mMultiple Airlines
Sun 12/148:00 pmYYZ - DEN
2 stops20h 11mMultiple Airlines
Deal found 11/9$334
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/49:42 amDEN - YYZ
2 stops18h 38mMultiple Airlines
Sat 12/63:15 pmYYZ - DEN
1 stop12h 08mMultiple Airlines
Deal found 11/10$339
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Tue 12/912:59 amDEN - YYZ
2 stops16h 37mMultiple Airlines
Thu 12/117:55 pmYYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 11/10$345
This Kiwi.com deal was found by Cheapflights users on 11/9. 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.
Wed 12/2410:29 pmDEN - YYZ
2 stops30h 18mMultiple Airlines
Sat 1/37:55 pmYYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 11/9$347
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/412:59 amDEN - YYZ
2 stops19h 13mMultiple Airlines
Wed 12/107:45 pmYYZ - DEN
1 stop7h 38mMultiple Airlines
Deal found 11/10$349
This American Airlines deal was found by Cheapflights users on 11/10. 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.
Thu 12/44:36 pmDEN - YYZ
1 stop16h 20mAmerican Airlines
Sat 12/61:12 pmYYZ - DEN
1 stop12h 09mAmerican Airlines
Deal found 11/10$350
This Kiwi.com deal was found by Cheapflights users on 11/7. 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.
Mon 12/112:59 amDEN - YYZ
2 stops14h 54mMultiple Airlines
Thu 12/47:55 pmYYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 11/7$352

Cheapflights Fare Finder

 
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 November 10, 2025.
Use the filters below to find and compare flights from Denver to Ontario that are best for you.

Fly from

Denver

Fly to

Ontario

Route

Depart

Return

Price

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Wed 1/7

11:59 pm-4:25 pm

2 stops14h 26m

Toronto Island

Mon 1/12

9:15 am-9:50 pm

1 stop14h 35m

$325

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sun 11/30

11:59 pm-5:53 pm

1 stop15h 54m

Toronto Pearson Intl

Sat 12/6

3:15 pm-1:23 am

1 stop12h 08m

$327

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sun 1/25

3:03 pm-1:42 pm

1 stop20h 39m

Toronto Island

Sun 2/1

8:55 am-4:06 pm

1 stop9h 11m

$332

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 12/1

11:15 pm-5:25 pm

2 stops16h 10m

Ottawa

Sun 12/7

4:20 pm-11:04 pm

1 stop32h 44m

$354

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Wed 12/24

9:33 am-4:48 pm

2 stops29h 15m

Toronto Island

Sat 1/3

8:55 am-8:12 pm

1 stop13h 17m

$356

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Fri 12/12

7:40 am-8:00 pm

1 stop10h 20m

Toronto Island

Sat 12/13

7:00 am-1:23 am

2 stops20h 23m

$358

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 12/1

11:59 pm-5:13 pm

1 stop15h 14m

Ottawa

Mon 12/8

7:00 am-10:18 am

2 stops29h 18m

$360

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 1/12

7:00 am-3:35 pm

1 stop30h 35m

Toronto Pearson Intl

Tue 1/20

4:45 pm-11:35 pm

1 stop32h 50m

$362

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Mon 1/5

11:59 pm-6:55 pm

2 stops16h 56m

Toronto Island

Fri 1/9

9:15 am-9:50 pm

1 stop14h 35m

$364

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Fri 12/5

3:42 pm-3:35 pm

1 stop21h 53m

Toronto Pearson Intl

Mon 12/8

4:45 pm-11:44 am

1 stop20h 59m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 60 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.

Cheapflights Insights

Everything you need to know about your flight from Denver to Ontario

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

Currently, June is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of $129). Flying from Denver to Region of Ontario in February is currently the most expensive (average of $232). 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 November 10, 2025.

When flying from Denver to Region of Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 34% versus a flight in the evening.

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 November 10, 2025.

The most flights from DEN to CAON are scheduled on a Wednesday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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 November 10, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and WestJet from Denver to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,004 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,004 reviews
Delta
7.9
Good
8,004 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,011 reviews
Delta
7.9
Good
8,004 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,156 reviews
Delta
7.9
Good
8,004 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,429 reviews
Delta
7.9
Good
8,004 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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.

  • How long is the flight from Denver to Region of Ontario?

    Airlines like Alaska Airlines, Delta, and American Airlines fly from Denver to Region of Ontario in about 12h 15m. The time it takes to get you to your destination can typically vary by up to 18h 20m. The distance between Denver and Region of Ontario is about 1606 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 Air Canada (81%), United Airlines (80%) and Austrian Airlines (78%).

  • 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 $548, our data indicates the cheapest price to be $225. The most popular route (Denver Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $361.

  • 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, June is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of $129). Flying from Denver to Region of Ontario in February is currently the most expensive (average of $232). 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.

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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 Sydney flights

Top 3 airlines flying from Denver to Ontario

Discover the top 3 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 November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$143Average$303FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$221Average$533FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$289Average$516FlexibilityNo cancel feeOn-time69%

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