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Ontario

$93+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap 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 December 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/283:00 pmDEN - YUL
2 stops30h 45mMultiple Airlines
Sun 1/184:35 pmYUL - DEN
1 stop17h 45mMultiple Airlines
Deal found 12/26$766
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/294:25 pmDEN - YYZ
1 stop13h 30mMultiple Airlines
Sat 1/310:15 amYYZ - DEN
1 stop24h 41mMultiple Airlines
Deal found 12/26$797
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/269:33 amDEN - YTZ
1 stop10h 37mMultiple Airlines
Tue 12/307:40 pmYTZ - DEN
1 stop25h 29mMultiple Airlines
Deal found 12/26$837
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/283:00 pmDEN - YYZ
2 stops52h 40mMultiple Airlines
Sat 1/37:10 amYYZ - DEN
1 stop12h 24mMultiple Airlines
Deal found 12/26$844
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/283:00 pmDEN - YYZ
2 stops52h 40mMultiple Airlines
Thu 1/17:10 amYYZ - DEN
1 stop12h 01mMultiple Airlines
Deal found 12/26$855
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/2611:06 amDEN - YYZ
2 stops32h 13mMultiple Airlines
Tue 12/302:35 pmYYZ - DEN
1 stop30h 55mMultiple Airlines
Deal found 12/26$865
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:59 pmDEN - YYZ
2 stops14h 46mMultiple Airlines
Sun 1/47:55 pmYYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 12/27$874
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:05 amDEN - YUL
1 stop11h 35mMultiple Airlines
Fri 1/25:25 pmYUL - DEN
2 stops16h 59mMultiple Airlines
Deal found 12/27$893
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:59 pmDEN - YYZ
2 stops18h 14mMultiple Airlines
Mon 1/58:20 pmYYZ - DEN
1 stop28h 39mMultiple Airlines
Deal found 12/27$921
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:05 amDEN - YUL
1 stop28h 40mMultiple Airlines
Fri 1/25:25 pmYUL - DEN
2 stops16h 59mMultiple Airlines
Deal found 12/27$926
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:05 amDEN - YUL
1 stop11h 35mMultiple Airlines
Sat 1/37:20 pmYUL - DEN
2 stops34h 38mMultiple Airlines
Deal found 12/27$958
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/2810:15 amDEN - YUL
2 stops9h 01mUnited Airlines
Sun 1/185:25 pmYUL - DEN
Nonstop4h 30mUnited Airlines
Deal found 12/26$966

Find flight deals from Denver to Ontario

Keep the following information in mind while searching for Denver to Ontario flight deals. Data was last updated December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$214
(Kiwi.com)

One-way from

$93
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$588

Good round-trip deal

$571 or less

Good one-way deal

$308 or less
Provider with most accurate pricing for Denver Intl-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Toronto (YTO) flights.
Search Deals
From Denver Intl to Ontario
Search Deals
One-way flight from Denver Intl to Ontario
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Denver Intl to Ontario.
Search Deals

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 December 28, 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 - YYZ

DENYYZ

Denver Intl

Sun 2/8

9:10 am-3:35 pm

1 stop28h 25m

Toronto Pearson Intl

Tue 2/17

1:30 pm-3:56 am

2 stops16h 26m

$253

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 2/10

11:59 pm-2:16 pm

1 stop12h 17m

Toronto Pearson Intl

Tue 2/17

8:20 pm-10:59 pm

1 stop28h 39m

$278

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Thu 5/21

12:15 pm-10:52 pm

1 stop8h 37m

Toronto Pearson Intl

Sun 5/24

11:00 am-6:50 pm

1 stop9h 50m

$302

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 3/16

7:05 pm-6:43 am

1 stop9h 38m

Toronto Pearson Intl

Sun 3/22

8:00 pm-9:01 am

1 stop15h 01m

$323

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Fri 2/27

7:52 pm-3:35 pm

1 stop17h 43m

Toronto Pearson Intl

Mon 3/2

4:45 pm-12:14 pm

1 stop21h 29m

$327

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 3/7

12:49 pm-6:13 am

2 stops15h 24m

Toronto Pearson Intl

Mon 3/9

8:00 pm-3:56 am

1 stop9h 56m

$329

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 3/7

11:38 am-2:35 pm

2 stops24h 57m

Toronto Pearson Intl

Mon 3/9

4:45 pm-10:42 am

2 stops19h 57m

$341

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 2/10

11:49 am-3:35 pm

2 stops25h 46m

Toronto Pearson Intl

Tue 2/17

4:45 pm-10:42 am

2 stops19h 57m

$341

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Fri 1/16

6:13 pm-1:20 pm

2 stops17h 07m

Toronto Island

Mon 1/19

9:20 am-10:59 pm

1 stop15h 39m

$341

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 1/25

9:41 am-5:15 pm

1 stop29h 34m

Ottawa

Sun 2/1

4:15 pm-12:19 pm

2 stops22h 04m

$342

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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 December 28, 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 December 28, 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).

How much does it cost to fly round-trip from Denver to Region of Ontario?

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 December 28, 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
8,015 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
8,015 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
9,113 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
3,222 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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
10,562 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

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 WestJet, Air Canada, and American Airlines fly from Denver to Region of Ontario in about 8h 27m. The time it takes to get you to your destination can typically vary by up to 10h 42m. The distance between Denver and Region of Ontario is about 1322 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $150 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from $167 and $218, 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 Austrian Airlines (86%), Air Canada (78%) and United Airlines (77%).

  • 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 $621, our data indicates the cheapest price to be $194. The most popular route (Denver Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $386.

  • 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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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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$143Average$303FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$218Average$533FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$289Average$514FlexibilityNo cancel feeOn-time69%

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