Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Denver to Ontario from C$ 121

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 25/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
26 Jan — 2 Feb1
1 adult

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 21 January 2025.

Round-trip from

C$ 358

One-way from

C$ 121

Good round-trip deal

C$ 455 or less

Good one-way deal

C$ 294 or less
24/2-28/2
  • 24/2-28/2
  • 2 total stops
  • 18h 17m total
  • Denver to Ontario
Search Deals
25/2
  • 25/2
  • 1 total stop
  • 11h 29m total
  • Denver to Ontario
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

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 21 January 2025.

Mon 24/27:34 p.m.DEN - YYZ
1 stop8h 21mMultiple Airlines
Fri 28/28:00 p.m.YYZ - DEN
1 stop9h 56mMultiple Airlines
Deal found 21/1C$ 358
Fri 21/210:44 p.m.DEN - YUL
1 stop15h 51mMultiple Airlines
Mon 24/28:55 a.m.YUL - DEN
2 stops26h 17mMultiple Airlines
Deal found 21/1C$ 463
Sat 1/38:55 p.m.DEN - YTZ
1 stop15h 02mMultiple Airlines
Thu 6/311:30 a.m.YTZ - DEN
2 stops21h 58mMultiple Airlines
Deal found 21/1C$ 472
Thu 3/710:20 a.m.DEN - YYZ
1 stop5h 10mSun Country Air
Sun 6/76:36 p.m.YYZ - DEN
1 stop16h 43mSun Country Air
Deal found 21/1C$ 576
Fri 21/26:54 a.m.DEN - YOW
2 stops15h 46mMultiple Airlines
Mon 24/24:25 p.m.YOW - DEN
1 stop18h 57mMultiple Airlines
Deal found 21/1C$ 590
Tue 4/37:00 a.m.DEN - YYZ
1 stop29h 55mAlaska Airlines
Fri 7/34:20 p.m.YYZ - DEN
1 stop33h 29mAlaska Airlines
Deal found 21/1C$ 615
Thu 5/612:15 p.m.DEN - YUL
1 stop10h 28mWestJet
Sun 8/67:00 a.m.YUL - DEN
1 stop13h 52mWestJet
Deal found 21/1C$ 620
Thu 5/612:15 p.m.DEN - YKF
1 stop10h 31mWestJet
Sun 8/66:00 a.m.YKF - DEN
1 stop14h 52mWestJet
Deal found 21/1C$ 672
Thu 5/612:15 p.m.DEN - YYZ
1 stop10h 09mWestJet
Sun 8/66:30 a.m.YYZ - DEN
1 stop14h 22mWestJet
Deal found 21/1C$ 697
Fri 7/35:40 p.m.DEN - YYZ
Nonstop3h 12mAir Canada
Fri 14/38:35 a.m.YYZ - DEN
Nonstop3h 53mAir Canada
Deal found 21/1C$ 705
Fri 4/411:59 p.m.DEN - YUL
1 stop11h 40mAmerican Airlines
Sat 5/43:40 p.m.YUL - DEN
1 stop8h 19mAmerican Airlines
Deal found 21/1C$ 711
Thu 6/27:05 a.m.DEN - YYZ
1 stop11h 23mDelta
Mon 10/27:55 a.m.YYZ - DEN
1 stop10h 39mDelta
Deal found 21/1C$ 740

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 629,999 searches. Data last updated 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 24/2

7:34 p.m.-5:55 a.m.

1 stop8h 21m

Toronto Pearson Intl

Fri 28/2

8:00 p.m.-3:56 a.m.

1 stop9h 56m

C$ 358

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 21/2

10:44 p.m.-4:35 p.m.

1 stop15h 51m

Montreal Pierre Elliott Trudeau Intl

Mon 24/2

6:45 a.m.-9:22 a.m.

2 stops28h 37m

C$ 458

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sat 1/3

8:55 p.m.-1:57 p.m.

1 stop15h 02m

Toronto Island

Thu 6/3

11:30 a.m.-7:28 a.m.

2 stops21h 58m

C$ 472

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Thu 3/7

10:20 a.m.-5:30 p.m.

1 stop5h 10m

Toronto Pearson Intl

Sun 6/7

6:36 p.m.-9:19 a.m.

1 stop16h 43m

C$ 576

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 21/2

6:54 a.m.-12:40 a.m.

2 stops15h 46m

Ottawa

Mon 24/2

4:25 p.m.-9:22 a.m.

1 stop18h 57m

C$ 590

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 4/3

7:00 a.m.-2:55 p.m.

1 stop29h 55m

Toronto Pearson Intl

Fri 7/3

4:20 p.m.-11:49 p.m.

1 stop33h 29m

C$ 615

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Thu 5/6

12:15 p.m.-12:43 a.m.

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

Sun 8/6

7:00 a.m.-6:52 p.m.

1 stop13h 52m

C$ 620

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 4/4

5:26 p.m.-11:40 a.m.

1 stop16h 14m

Montreal Pierre Elliott Trudeau Intl

Sat 5/4

3:40 p.m.-8:15 a.m.

1 stop18h 35m

C$ 665

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Thu 5/6

12:15 p.m.-12:46 a.m.

1 stop10h 31m

Toronto Region of Waterloo Intl

Sun 8/6

6:00 a.m.-6:52 p.m.

1 stop14h 52m

C$ 672

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Sun 9/2

6:29 a.m.-10:30 p.m.

2 stops14h 01m

Montreal Pierre Elliott Trudeau Intl

Sat 15/2

12:55 p.m.-10:56 p.m.

2 stops12h 01m

C$ 679

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/1

Showing 1-10 of 49 results
1
2
3
...
5

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 C$ 168). Flying from Denver to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 21 January 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 21 January 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 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 21 January 2025.
Read through reviews of airlines operating flights from Denver to Ontario, such as United Airlines, Air Canada and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Entertainment

7.1

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

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
Check prices

Entertainment

7.1

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

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
Check prices

Entertainment

7.1

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

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
Check prices

Entertainment

7.1

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

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
8,984 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Entertainment

7.1

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

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
Check prices

Entertainment

7.1

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

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?

    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.

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

    C$ 292 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from C$ 321 and C$ 355, 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 - 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 United Airlines (73%), Austrian Airlines (58%) or Air Canada (55%) 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$ 660, our data indicates the cheapest price to be C$ 220. The most popular route (Denver Intl - Toronto Pearson Intl), is priced around C$ 348.

  • 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 C$ 168). Flying from Denver to Region of Ontario in July is currently the most expensive (average of C$ 258). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 Calgary flights
Denver to Pearson Intl flights
Denver to Pierre Elliott Trudeau Intl flights
Denver to Winnipeg flights
Denver to Edmonton flights
Denver to Abbotsford flights
Denver to Kelowna flights
Denver to Toronto Island flights
Denver to Québec City flights
Denver to Ottawa flights
Denver to Halifax flights
Colorado Springs to Vancouver Intl flights
Denver to Victoria flights
Colorado Springs to Pierre Elliott Trudeau Intl flights
Denver to Hamilton flights
Colorado Springs to Pearson Intl flights
Vail to Vancouver Intl flights
Denver to Charlottetown flights
Denver to Saskatoon flights
Denver to Yellowknife flights
Aspen to Vancouver Intl flights
Denver to St. John's flights
Grand Junction to Edmonton flights
Denver to Terrace flights
Colorado Springs to St. John's flights
Denver to Whitehorse flights
Denver to Cranbrook flights
Colorado Springs to Victoria flights
Colorado Springs to Calgary flights
Colorado Springs to Ottawa 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 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 263AverageC$ 853FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 759AverageC$ 1,096FlexibilityNo cancel feeOn-time69%
Search United Airlines 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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.