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Cheap flights from Ontario to Denver from C$ 223

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
18 Apr — 25 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Denver

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Denver
Explore the most affordable flight options available from Ontario to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 March 2026.

Fri 22/58:50 a.m.
YTZ
-
DEN
1 stop17h 02m
Multiple Airlines
Sat 30/54:59 p.m.
DEN
-
YTZ
1 stop18h 06m
Multiple Airlines
Deal found 16/3C$ 507
Tue 28/49:25 a.m.
YTZ
-
DEN
1 stop8h 39m
Multiple Airlines
Sat 2/511:59 p.m.
DEN
-
YTZ
2 stops35h 06m
Multiple Airlines
Deal found 17/3C$ 508
Mon 13/49:25 a.m.
YTZ
-
DEN
1 stop26h 47m
Multiple Airlines
Mon 20/47:35 a.m.
DEN
-
YTZ
1 stop27h 35m
Multiple Airlines
Deal found 16/3C$ 513
Thu 23/48:00 p.m.
YYZ
-
DEN
1 stop14h 50m
Multiple Airlines
Mon 27/412:51 p.m.
DEN
-
YYZ
1 stop24h 54m
Multiple Airlines
Deal found 14/3C$ 513
Mon 4/54:50 p.m.
YYZ
-
DEN
1 stop17h 34m
Multiple Airlines
Sun 31/57:01 p.m.
DEN
-
YYZ
2 stops32h 09m
Multiple Airlines
Deal found 18/3C$ 517
Wed 29/46:30 a.m.
YYZ
-
DEN
2 stops17h 59m
Multiple Airlines
Wed 6/510:29 p.m.
DEN
-
YYZ
1 stop19h 40m
Multiple Airlines
Deal found 15/3C$ 518
Sat 4/47:10 a.m.
YYZ
-
DEN
1 stop17h 54m
Multiple Airlines
Tue 14/410:29 p.m.
DEN
-
YYZ
2 stops19h 07m
Multiple Airlines
Deal found 18/3C$ 522
Thu 4/69:40 a.m.
YYZ
-
DEN
1 stop16h 58m
Multiple Airlines
Mon 8/67:01 p.m.
DEN
-
YYZ
2 stops28h 04m
Multiple Airlines
Deal found 18/3C$ 524
Mon 20/48:00 p.m.
YYZ
-
DEN
1 stop9h 59m
Multiple Airlines
Sun 10/512:15 p.m.
DEN
-
YYZ
1 stop8h 30m
Multiple Airlines
Deal found 15/3C$ 525
Tue 31/37:15 a.m.
YYZ
-
DEN
2 stops30h 27m
Multiple Airlines
Wed 8/410:30 p.m.
DEN
-
YYZ
1 stop30h 30m
Multiple Airlines
Deal found 18/3C$ 528
Mon 6/48:00 p.m.
YYZ
-
DEN
1 stop9h 59m
Multiple Airlines
Thu 9/46:00 a.m.
DEN
-
YYZ
1 stop23h 00m
Multiple Airlines
Deal found 15/3C$ 529
Mon 20/48:00 a.m.
YUL
-
DEN
2 stops30h 14m
Multiple Airlines
Wed 22/411:59 p.m.
DEN
-
YUL
1 stop22h 31m
Multiple Airlines
Deal found 14/3C$ 533

Find flight deals from Ontario to Denver

Keep the following information in mind while searching for Ontario to Denver flight deals. Data was last updated 19 March 2026.

Round-trip from

C$ 507

One-way from

C$ 223

Popular in

February

Cheapest in

November

Average price

C$ 651

Good round-trip deal

C$ 580 or less

Good one-way deal

C$ 327 or less
22/5-30/5
  • 22/5-30/5
  • 2 total stops
  • 35h 08m total
  • Ontario to Denver
Search Deals
5/5
  • 5/5
  • 1 total stop
  • 17h 02m total
  • Ontario to Denver
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Denver Intl.
Search Deals
Price to beat on a one-way flight from Ontario to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Denver 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 19 March 2026.
Use the filters below to find and compare flights from Ontario to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Fri 17/4

9:30 a.m.-9:05 p.m.

1 stop13h 35m

Denver Intl

Tue 21/4

7:12 a.m.-6:51 p.m.

1 stop9h 39m

C$ 611

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

9:20 a.m.-9:09 p.m.

1 stop13h 49m

Denver Intl

Wed 15/4

5:55 p.m.-8:40 a.m.

1 stop12h 45m

C$ 621

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Tue 2/6

7:10 a.m.-10:40 p.m.

2 stops17h 30m

Denver Intl

Sat 6/6

5:30 a.m.-11:41 p.m.

2 stops16h 11m

C$ 630

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Mon 30/3

6:49 p.m.-10:06 a.m.

1 stop17h 17m

Denver Intl

Mon 6/4

11:59 p.m.-11:19 a.m.

1 stop9h 20m

C$ 637

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Fri 10/4

4:45 p.m.-9:28 p.m.

1 stop6h 43m

Denver Intl

Tue 14/4

5:55 p.m.-8:40 a.m.

1 stop12h 45m

C$ 646
Quickest round-trip

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 11/6

10:45 a.m.-12:30 p.m.

Nonstop3h 45m

Denver Intl

Wed 17/6

4:15 p.m.-9:32 p.m.

Nonstop3h 17m

C$ 661

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 18/6

4:18 p.m.-6:03 p.m.

Nonstop3h 45m

Denver Intl

Mon 22/6

4:15 p.m.-9:32 p.m.

Nonstop3h 17m

C$ 661

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 23/4

6:00 a.m.-7:42 p.m.

1 stop15h 42m

Denver Intl

Sun 26/4

6:10 a.m.-5:21 p.m.

1 stop9h 11m

C$ 663

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Mon 20/4

3:53 p.m.-11:57 p.m.

1 stop10h 04m

Denver Intl

Tue 21/4

9:55 a.m.-3:14 p.m.

Nonstop3h 19m

C$ 669

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 9/7

4:18 p.m.-6:03 p.m.

Nonstop3h 45m

Denver Intl

Mon 13/7

4:15 p.m.-9:32 p.m.

Nonstop3h 17m

C$ 669

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Ontario 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 Ontario to Denver

What is the cheapest month to book a flight from Region of Ontario to Denver?

Currently, September is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of C$ 299). Flying from Region of Ontario to Denver in January is currently the most expensive (average of C$ 526). 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 ON to DEN?

Find hourly flight availability from Ontario to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Denver as you normally would.

Weekly flight availability from Region of Ontario to Denver

Explore weekly flight availability from Ontario to Denver. 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 19 March 2026.

The most flights from CAON to DEN are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

Related info for your journey

Find useful and relevant information for your journey from Ontario to Denver. 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 into for flights to Denver from Ontario?

    If you book a flight to Denver from Ontario, you will be flying to Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 29.7 km from the centre of Denver.

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

    A quick flight from Region of Ontario to Denver can take about 3h 45m. Delta provides one of the quickest options available for as low as C$ 661. Airlines will cover a distance of 2111 km. This flight may include one or multiple stops.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 170. Users have also found prices from C$ 271 and C$ 301 on Air Canada and United Airlines, respectively.

  • What are the most popular routes from Region of Ontario to Denver?

    Most travellers choose Toronto Pearson Intl - Denver Intl, Montreal Pierre Elliott Trudeau Intl - Denver Intl or Toronto Island - Denver Intl when deciding on the best route from Region of Ontario to Denver.

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

    Before booking your flight to Denver from Region of Ontario, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (67%), Air Canada (62%), United Airlines( 62%).

  • What are the cheapest flights from Region of Ontario to Denver?

    On average you can expect to pay C$ 1,460 for a flight from Region of Ontario to Denver. The cheapest flight overall is C$ 252 while the most popular route, (Toronto Pearson Intl - Denver Intl) is currently priced at C$ 467.

  • Can I find deals for flights from Ontario to Denver that include hotel bookings?

    Yes. In addition to deals on Ontario to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Denver.

  • Can I find deals for business class flights from Ontario to Denver?

    Yes. Cheapflights offers flight deals from Ontario to Denver 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 Region of Ontario to Denver?

    Currently, September is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of C$ 299). Flying from Region of Ontario to Denver in January is currently the most expensive (average of C$ 526). 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

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Golden
Thornton
Black Hawk

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Top 3 airlines flying from Ontario to Denver

Discover the top 3 airlines that operate flights from Ontario to Denver. 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 19 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 254AverageC$ 433FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 302AverageC$ 639FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 392AverageC$ 635FlexibilityNo 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 Ontario to Denver?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Denver. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to Denver from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Denver flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from Ontario to Denver on Cheapflights with our Price Alert feature and get notified when better prices are available.

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