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Cheap flights from Denver to Ontario from C$ 75

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
22 Apr — 29 Apr1
1 adult

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 17 April 2025.

Round-trip from

C$ 225

One-way from

C$ 75

Popular in

November

Cheapest in

March

Average price

C$ 751

Good one-way deal

C$ 343 or less
Air Canada
  • Air Canada
  • 22/5-28/5
  • 2 total stops
  • 13h 49m total
  • Denver to Ontario
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WestJet
  • WestJet
  • 31/5
  • 1 total stop
  • 8h 41m total
  • Denver to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 64 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 17 April 2025.

Thu 22/57:40 p.m.DEN - YXU
1 stop7h 34mMultiple Airlines
Wed 28/56:15 a.m.YXU - DEN
1 stop6h 15mMultiple Airlines
Deal found 17/4C$ 225
Fri 30/57:40 p.m.DEN - YXU
1 stop7h 34mWestJet
Fri 6/68:00 p.m.YXU - DEN
1 stop17h 27mWestJet
Deal found 17/4C$ 241
Tue 20/512:15 p.m.DEN - YKF
1 stop10h 31mWestJet
Sun 25/56:00 a.m.YKF - DEN
1 stop14h 52mWestJet
Deal found 17/4C$ 279
Wed 28/57:45 a.m.DEN - YXU
1 stop5h 18mUnited Airlines
Sat 7/66:15 a.m.YXU - DEN
1 stop7h 13mUnited Airlines
Deal found 17/4C$ 280
Sat 3/512:15 p.m.DEN - YYZ
1 stop15h 59mWestJet
Sun 11/510:25 p.m.YYZ - DEN
1 stop15h 02mWestJet
Deal found 17/4C$ 280
Tue 30/97:05 p.m.DEN - YXU
2 stops12h 12mAir Canada
Wed 8/106:15 a.m.YXU - DEN
1 stop7h 43mAir Canada
Deal found 17/4C$ 287
Sat 24/51:33 p.m.DEN - YYZ
1 stop8h 39mMultiple Airlines
Sat 31/510:25 p.m.YYZ - DEN
1 stop15h 02mMultiple Airlines
Deal found 17/4C$ 304
Thu 29/57:40 p.m.DEN - YHM
1 stop27h 01mWestJet
Sun 1/66:00 a.m.YHM - DEN
1 stop14h 52mWestJet
Deal found 17/4C$ 319
Wed 4/612:15 p.m.DEN - YOW
1 stop10h 26mWestJet
Fri 18/77:15 p.m.YOW - DEN
1 stop18h 12mWestJet
Deal found 17/4C$ 366
Wed 27/812:15 p.m.DEN - YUL
1 stop10h 28mWestJet
Sun 31/85:30 p.m.YUL - DEN
1 stop19h 54mWestJet
Deal found 17/4C$ 377
Tue 10/67:15 p.m.DEN - YOW
1 stop11h 18mAir Canada
Sun 27/76:00 a.m.YOW - DEN
1 stop6h 21mAir Canada
Deal found 17/4C$ 392
Thu 7/812:15 p.m.DEN - YUL
1 stop10h 28mMultiple Airlines
Sat 16/88:05 a.m.YUL - DEN
Nonstop4h 16mMultiple Airlines
Deal found 17/4C$ 398

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 17 April 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

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 22/5

7:40 p.m.-5:14 a.m.

1 stop7h 34m

London

Wed 28/5

6:15 a.m.-10:30 a.m.

1 stop6h 15m

C$ 225

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 30/5

7:40 p.m.-5:14 a.m.

1 stop7h 34m

London

Fri 6/6

8:00 p.m.-11:27 a.m.

1 stop17h 27m

C$ 241

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Tue 20/5

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

1 stop10h 31m

Toronto Region of Waterloo Intl

Sun 25/5

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

1 stop14h 52m

C$ 279

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Wed 28/5

7:45 a.m.-3:03 p.m.

1 stop5h 18m

London

Sat 7/6

6:15 a.m.-11:28 a.m.

1 stop7h 13m

C$ 280

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 3/5

12:15 p.m.-6:14 a.m.

1 stop15h 59m

Toronto Pearson Intl

Sun 11/5

10:25 p.m.-11:27 a.m.

1 stop15h 02m

C$ 280

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Tue 30/9

7:05 p.m.-9:17 a.m.

2 stops12h 12m

London

Wed 8/10

6:15 a.m.-11:58 a.m.

1 stop7h 43m

C$ 287

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Sat 24/5

1:33 p.m.-12:12 a.m.

1 stop8h 39m

Toronto Pearson Intl

Sat 31/5

10:25 p.m.-11:27 a.m.

1 stop15h 02m

C$ 304

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Thu 29/5

7:40 p.m.-12:41 a.m.

1 stop27h 01m

Hamilton

Sun 1/6

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

1 stop14h 52m

C$ 319

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Thu 7/8

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

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

Sun 10/8

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

1 stop13h 52m

C$ 356

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 4/6

12:15 p.m.-12:41 a.m.

1 stop10h 26m

Ottawa

Fri 18/7

7:15 p.m.-11:27 a.m.

1 stop18h 12m

C$ 366

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 47 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, January is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of C$ 167). 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 17 April 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 17 April 2025.

The most flights from DEN to CAON are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, 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 17 April 2025.
Read through reviews of airlines operating flights from Denver to Ontario, such as Delta, United Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,809 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,143 reviews
Delta
8.0
Very good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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$ 75 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from C$ 164 and C$ 252, 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 - Ottawa.

  • 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 Austrian Airlines (76%), Air Canada (68%) or United Airlines (68%) 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$ 395, our data indicates the cheapest price to be C$ 306. The most popular route (Denver Intl - Montreal Pierre Elliott Trudeau Intl), is priced around C$ 376.

  • 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$ 167). 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

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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 Pierre Elliott Trudeau Intl flights
Denver to Pearson Intl flights
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Denver to Ottawa flights
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Denver to St. John's flights
Colorado Springs to Pierre Elliott Trudeau Intl flights
Denver to Saskatoon flights
Colorado Springs to Ottawa flights
Montrose to Edmonton flights
Grand Junction to Edmonton flights
Denver to Yellowknife flights
Colorado Springs to Calgary flights
Colorado Springs to Victoria flights
Denver to Whitehorse flights
Colorado Springs to St. John's flights
Denver to Terrace flights
Denver to Cranbrook flights

Top airline flying from Denver to Ontario

Discover the top airline 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 17 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 216AverageC$ 822FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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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