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$82+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
dic. 26 — ene. 21
vie. 12/26
vie. 1/2
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 noviembre 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$287
(Kiwi.com)

One-way from

$82
(Kiwi.com)

Popular in

November

Cheapest in

March

Average price

$683

Good round-trip deal

$540 or less

Good one-way deal

$280 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 noviembre 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/24. 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.
dom. 12/216:34 pmDEN - YYZ
1 stop10h 13mMultiple Airlines
lun. 1/510:15 pmYYZ - DEN
2 stops31h 43mMultiple Airlines
Deal found 11/24$332
This Kiwi.com deal was found by Cheapflights users on 11/24. 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.
dom. 12/216:34 pmDEN - YYZ
1 stop10h 13mMultiple Airlines
dom. 1/48:00 pmYYZ - DEN
1 stop15h 04mMultiple Airlines
Deal found 11/24$336
This Kiwi.com deal was found by Cheapflights users on 11/26. 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.
mar. 12/166:30 amDEN - YYZ
1 stop11h 25mMultiple Airlines
mié. 12/177:15 amYYZ - DEN
2 stops17h 49mMultiple Airlines
Deal found 11/26$337
This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
jue. 12/1810:37 pmDEN - YYZ
2 stops30h 21mMultiple Airlines
lun. 1/510:15 amYYZ - DEN
1 stop25h 25mMultiple Airlines
Deal found 11/25$346
This Kiwi.com deal was found by Cheapflights users on 11/23. 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. 12/2410:37 pmDEN - YYZ
1 stop19h 18mMultiple Airlines
dom. 1/48:00 pmYYZ - DEN
1 stop15h 04mMultiple Airlines
Deal found 11/23$348
This Kiwi.com deal was found by Cheapflights users on 11/24. 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. 12/2410:37 pmDEN - YYZ
1 stop30h 10mMultiple Airlines
jue. 1/17:55 pmYYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 11/24$350
This Kiwi.com deal was found by Cheapflights users on 11/23. 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.
jue. 12/256:15 amDEN - YYZ
2 stops11h 40mMultiple Airlines
dom. 1/48:00 pmYYZ - DEN
1 stop15h 04mMultiple Airlines
Deal found 11/23$351
This Kiwi.com deal was found by Cheapflights users on 11/26. 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.
lun. 12/159:34 amDEN - YYZ
1 stop12h 51mMultiple Airlines
mié. 12/177:15 amYYZ - DEN
2 stops17h 49mMultiple Airlines
Deal found 11/26$354
This Kiwi.com deal was found by Cheapflights users on 11/25. 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. 12/227:00 amDEN - YYZ
1 stop21h 20mMultiple Airlines
dom. 1/47:55 pmYYZ - DEN
1 stop15h 09mMultiple Airlines
Deal found 11/25$355
This Kiwi.com deal was found by Cheapflights users on 11/23. 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. 12/307:00 amDEN - YTZ
2 stops9h 57mMultiple Airlines
dom. 1/49:20 amYTZ - DEN
1 stop17h 25mMultiple Airlines
Deal found 11/23$359
This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
jue. 12/187:35 amDEN - YTZ
1 stop10h 25mMultiple Airlines
lun. 1/59:20 amYTZ - DEN
2 stops15h 57mMultiple Airlines
Deal found 11/25$364
This Kiwi.com deal was found by Cheapflights users on 11/26. 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.
mar. 12/167:40 amDEN - YTZ
1 stop10h 20mMultiple Airlines
mié. 12/177:00 amYTZ - DEN
2 stops18h 04mMultiple Airlines
Deal found 11/26$366

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 noviembre 26, 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

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

sáb. 1/10

6:33 pm-11:58 pm

1 stop27h 25m

Ottawa

sáb. 1/17

4:20 pm-1:55 pm

2 stops23h 35m

$332

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

mar. 12/16

6:30 am-7:55 pm

1 stop11h 25m

Toronto Pearson Intl

mié. 12/17

7:15 am-11:04 pm

2 stops17h 49m

$337

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

mar. 2/3

7:20 am-10:44 pm

2 stops13h 24m

Montreal Pierre Elliott Trudeau Intl

lun. 2/9

3:50 pm-10:49 am

1 stop20h 59m

$349

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

jue. 1/8

7:00 am-3:35 pm

1 stop30h 35m

Toronto Pearson Intl

mar. 1/13

4:45 pm-12:38 pm

1 stop21h 53m

$355

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

vie. 1/9

11:49 am-3:35 pm

2 stops25h 46m

Toronto Pearson Intl

mar. 1/13

4:45 pm-12:38 pm

1 stop21h 53m

$356

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

mar. 12/30

7:00 am-6:57 pm

2 stops9h 57m

Toronto Island

dom. 1/4

9:20 am-12:45 am

1 stop17h 25m

$359

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

mié. 1/7

7:00 am-3:35 pm

1 stop30h 35m

Toronto Pearson Intl

lun. 1/12

4:45 pm-12:38 pm

1 stop21h 53m

$364

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

jue. 12/18

7:35 am-8:00 pm

1 stop10h 25m

Toronto Island

lun. 1/5

9:20 am-11:17 pm

2 stops15h 57m

$364

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

mar. 12/16

7:40 am-8:00 pm

1 stop10h 20m

Toronto Island

mié. 12/17

7:00 am-11:04 pm

2 stops18h 04m

$366

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

lun. 1/5

6:02 am-3:35 pm

1 stop31h 33m

Toronto Pearson Intl

lun. 1/12

4:45 pm-12:38 pm

1 stop21h 53m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

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 noviembre 26, 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 noviembre 26, 2025.

The most flights from DEN to CAON are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 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 noviembre 26, 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
7,998 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
7,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
9,046 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
3,173 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
10,476 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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 American Airlines, Alaska Airlines, and United Airlines fly from Denver to Region of Ontario in about 11h 55m. The time it takes to get you to your destination can typically vary by up to 18h 40m. 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 (78%), United Airlines (78%) and Brussels 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 $649, our data indicates the cheapest price to be $225. The most popular route (Denver Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $287.

  • 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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Aspen to Ottawa flights
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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 noviembre 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$143Average$303FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$220Average$530FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$289Average$513FlexibilityNo cancel feeOn-time69%

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