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Cheap flights from Denver to Ontario from C$ 147

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

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 28 October 2025.

Round-trip from

C$ 436

One-way from

C$ 147

Popular in

November

Cheapest in

March

Average price

C$ 745

Good round-trip deal

C$ 680 or less

Good one-way deal

C$ 761 or less
11/11-18/11
  • 11/11-18/11
  • 3 total stops
  • 47h 56m total
  • Denver to Ontario
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20/1
  • 20/1
  • 2 total stops
  • 39h 30m total
  • Denver to Ontario
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Highest demand for flights based on searches. 6% potential increase in price (C$ 60 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 16 potential savings vs. average RT price).
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Average for round-trip flights in October 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

Enter your travel dates to find the best prices.

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 28 October 2025.

Tue 11/1112:59 a.m.DEN - YYZ
2 stops35h 41mMultiple Airlines
Tue 18/1112:40 p.m.YYZ - DEN
1 stop12h 15mMultiple Airlines
Deal found 28/10C$ 436
Fri 14/1111:04 a.m.DEN - YYZ
1 stop8h 03mMultiple Airlines
Mon 17/117:55 p.m.YYZ - DEN
1 stop10h 04mMultiple Airlines
Deal found 28/10C$ 449
Sun 16/1112:16 a.m.DEN - YYZ
2 stops18h 51mMultiple Airlines
Wed 19/114:45 p.m.YYZ - DEN
1 stop26h 02mMultiple Airlines
Deal found 28/10C$ 450
Wed 17/1211:59 p.m.DEN - YYZ
1 stop12h 21mMultiple Airlines
Wed 7/17:45 a.m.YYZ - DEN
2 stops36h 58mMultiple Airlines
Deal found 28/10C$ 452
Fri 14/1111:04 a.m.DEN - YYZ
1 stop8h 03mMultiple Airlines
Thu 20/118:45 p.m.YYZ - DEN
2 stops22h 02mMultiple Airlines
Deal found 28/10C$ 456
Fri 14/1111:04 a.m.DEN - YYZ
1 stop8h 03mMultiple Airlines
Fri 21/118:45 p.m.YYZ - DEN
2 stops22h 02mMultiple Airlines
Deal found 28/10C$ 457
Wed 17/1211:59 p.m.DEN - YYZ
1 stop12h 21mMultiple Airlines
Sun 4/18:00 p.m.YYZ - DEN
1 stop9h 58mMultiple Airlines
Deal found 28/10C$ 460
Sun 21/126:34 p.m.DEN - YYZ
1 stop10h 13mMultiple Airlines
Tue 6/11:30 p.m.YYZ - DEN
2 stops16h 28mMultiple Airlines
Deal found 28/10C$ 463
Wed 17/1211:59 p.m.DEN - YYZ
1 stop12h 21mMultiple Airlines
Sat 3/17:55 p.m.YYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 27/10C$ 464
Mon 22/127:00 a.m.DEN - YYZ
1 stop10h 55mMultiple Airlines
Sun 4/17:55 p.m.YYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 28/10C$ 467
Sun 21/127:00 a.m.DEN - YYZ
1 stop10h 55mMultiple Airlines
Sun 4/17:55 p.m.YYZ - DEN
1 stop10h 03mMultiple Airlines
Deal found 28/10C$ 469
Thu 27/116:22 a.m.DEN - YTZ
1 stop10h 33mMultiple Airlines
Thu 4/128:55 a.m.YTZ - DEN
1 stop9h 20mMultiple Airlines
Deal found 28/10C$ 470

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 629,999 searches. Data last updated 28 October 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

Thu 27/11

6:22 a.m.-6:55 p.m.

1 stop10h 33m

Toronto Island

Thu 4/12

8:55 a.m.-4:15 p.m.

1 stop9h 20m

C$ 470

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sun 9/11

8:05 a.m.-6:57 p.m.

1 stop8h 52m

Toronto Island

Wed 12/11

9:15 a.m.-2:41 p.m.

2 stops31h 26m

C$ 480

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 17/11

8:02 p.m.-3:35 p.m.

1 stop17h 33m

Toronto Pearson Intl

Wed 19/11

4:45 p.m.-11:59 p.m.

1 stop9h 14m

C$ 495

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 25/11

6:22 a.m.-5:25 p.m.

1 stop9h 03m

Ottawa

Tue 2/12

3:55 p.m.-7:09 p.m.

1 stop29h 14m

C$ 531

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sun 16/11

4:08 p.m.-3:58 p.m.

2 stops21h 50m

Toronto Island

Sun 23/11

2:30 p.m.-9:00 a.m.

1 stop20h 30m

C$ 537

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Fri 5/12

12:59 a.m.-7:50 p.m.

2 stops16h 51m

Toronto Island

Sun 7/12

9:15 a.m.-2:02 p.m.

1 stop6h 47m

C$ 543

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sun 22/3

8:45 p.m.-1:42 p.m.

1 stop14h 57m

Toronto Island

Fri 27/3

9:15 a.m.-8:56 a.m.

1 stop25h 41m

C$ 551

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 18/11

11:31 a.m.-3:35 p.m.

2 stops26h 04m

Toronto Pearson Intl

Fri 21/11

4:45 p.m.-11:59 p.m.

1 stop9h 14m

C$ 571

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 15/11

1:23 p.m.-3:35 p.m.

1 stop24h 12m

Toronto Pearson Intl

Tue 18/11

4:45 p.m.-2:41 p.m.

1 stop23h 56m

C$ 573

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Wed 19/11

8:02 p.m.-3:35 p.m.

1 stop17h 33m

Toronto Pearson Intl

Fri 21/11

4:45 p.m.-11:59 p.m.

1 stop9h 14m

C$ 573

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

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 C$ 180). Flying from Denver to Region of Ontario in February is currently the most expensive (average of C$ 324). 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 28 October 2025.

When flying from Denver to Region of Ontario, 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 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 28 October 2025.

The most flights from DEN to CAON are scheduled on a Monday (5 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 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 28 October 2025.
Read through reviews of airlines operating flights from Denver to Ontario, such as United Airlines and Air Canada. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,001 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.
United Airlines
7.4
Good
9,001 reviews
United Airlines
7.4
Good
9,001 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.
Air Canada
7.1
Good
10,371 reviews
United Airlines
7.4
Good
9,001 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget 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?

    Located just 29.7 km from the city centre, Denver Intl (DEN) is the airport most travellers will use when flying to Ontario from Denver.

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

    Alaska Airlines, United Airlines, and Air Canada can get you from Denver to Region of Ontario in just under 11h 55m. Your travel time can differ by up to 7h 09m. There are 2585 km between Denver and Region of Ontario. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 - Toronto Pearson Intl. You may also consider Denver Intl - Montreal Pierre Elliott Trudeau Intl or Denver Intl - Toronto Island.

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

    No one likes to see their flight delayed. When booking a flight from Denver to Region of Ontario consider choosing Brussels Airlines (79%), Air Canada (77%) or United Airlines (76%) as they are the most reliable in getting you off to your destination on time.

  • 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 C$ 815, our data indicates the cheapest price to be C$ 301. The most popular route (Denver Intl - Toronto Pearson Intl), is priced around C$ 323.

  • 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 C$ 180). Flying from Denver to Region of Ontario in February is currently the most expensive (average of C$ 324). 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.
Denver to Vancouver Intl flights
Denver to Pearson Intl flights
Denver to Pierre Elliott Trudeau Intl flights
Denver to Calgary flights
Denver to Toronto Island flights
Denver to Kelowna flights
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Denver to Québec City flights
Denver to Edmonton flights
Denver to Winnipeg flights
Colorado Springs to Pearson Intl flights
Denver to Ottawa flights
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Denver to Victoria flights
Denver to Yellowknife flights
Colorado Springs to Calgary flights
Colorado Springs to Vancouver Intl flights
Denver to St. John's flights
Denver to Saskatoon flights
Denver to Hamilton flights
Colorado Springs to Pierre Elliott Trudeau Intl flights
Vail to Vancouver Intl flights
Aspen to Vancouver Intl flights
Denver to Terrace flights
Colorado Springs to St. John's flights
Denver to Whitehorse flights
Denver to Cranbrook flights
Denver to Charlottetown flights
Colorado Springs to Victoria flights
Colorado Springs to Ottawa flights
Grand Junction to Edmonton flights
Montrose to Edmonton 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 629,999 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 247AverageC$ 580FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 291AverageC$ 557FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Denver to Ontario?

When you search for this flight from Denver to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Denver to Ontario?

Cheapflights simply makes it quick and affordable to book flights from Denver to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Denver to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from Denver to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from Denver to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Denver to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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