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Cheap flights from Ontario to Denver from C$ 245

YYZ — DEN
17 Oct — 24 Oct1
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

Sat 10/104:15 p.m. -
1 stop21h 05m
Fri 16/102:10 p.m. -
2 stops13h 25m
Deal found 15/9C$ 513
Wed 7/1011:40 a.m. -
1 stop13h 12m
Tue 13/106:09 p.m. -
1 stop14h 50m
Deal found 16/9C$ 554
Sun 1/114:35 p.m. -
1 stop17h 51m
Mon 9/119:19 p.m. -
2 stops15h 47m
Deal found 16/9C$ 555
Thu 12/114:35 p.m. -
1 stop17h 51m
Mon 16/118:55 p.m. -
1 stop16h 11m
Deal found 15/9C$ 557
Fri 2/106:40 p.m. -
Nonstop3h 37m
Mon 5/106:05 p.m. -
Nonstop3h 11m
Deal found 15/9C$ 557
Tue 20/1012:55 p.m. -
1 stop10h 54m
Tue 27/107:02 p.m. -
1 stop18h 21m
Deal found 16/9C$ 558
Thu 1/1012:00 p.m. -
1 stop8h 46m
Sun 4/1011:25 a.m. -
1 stop6h 28m
Deal found 15/9C$ 560
Fri 2/106:00 a.m. -
1 stop5h 48m
Mon 5/107:15 a.m. -
1 stop8h 03m
Deal found 15/9C$ 564
Fri 2/106:10 p.m. -
1 stop5h 22m
Sun 11/1012:59 a.m. -
1 stop7h 24m
Deal found 15/9C$ 565
Thu 8/108:50 a.m. -
Nonstop3h 37m
Sun 11/1011:35 a.m. -
Nonstop3h 10m
Deal found 15/9C$ 568
Fri 16/101:45 p.m. -
1 stop20h 34m
Sun 25/108:55 p.m. -
1 stop16h 11m
Deal found 16/9C$ 569
Tue 13/1010:50 a.m. -
2 stops14h 53m
Fri 23/1010:45 p.m. -
1 stop23h 14m
Deal found 15/9C$ 569

Find flight deals from Ontario to Denver

Round-trip from

C$ 513

One-way from

C$ 245

Popular in

February

Cheapest in

November

Average price

C$ 677

Good round-trip deal

C$ 649 or less

Good one-way deal

C$ 345 or less
10/10-16/10
  • 10/10-16/10
  • 3 total stops
  • 34h 30m total
  • Ontario to Denver
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WestJet
  • WestJet
  • 11/10-31/12
  • 1 total stop
  • 16h 40m total
  • Ontario to Denver
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ontario to Denver Intl.
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Price to beat on a one-way flight from Ontario to Denver Intl.
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Cheapflights Fare Finder

 
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

TorontoDenver

YKF Toronto Region of Waterloo Intl - DEN Denver Intl

YKFDEN

Toronto Region of Waterloo Intl

Sun 11/10

8:40 p.m.-11:20 a.m.

1 stop16h 40m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 245

HamiltonDenver

YHM Hamilton - DEN Denver Intl

YHMDEN

Hamilton

Sun 11/10

6:10 p.m.-11:20 a.m.

1 stop19h 10m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 267

TorontoDenver

YYZ Toronto Pearson Intl - DEN Denver Intl

YYZDEN

Toronto Pearson Intl

Tue 27/10

7:15 a.m.-8:22 a.m.

2 stops27h 07m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 292

TorontoDenver

YYZ Toronto Pearson Intl - DEN Denver Intl

YYZDEN

Toronto Pearson Intl

Fri 30/10

2:55 p.m.-4:50 p.m.

Nonstop3h 55m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 312

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 2/10

12:25 p.m.-8:05 p.m.

2 stops9h 40m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 316

HamiltonDenver

YHM Hamilton - DEN Denver Intl

YHMDEN

Hamilton

Wed 7/10

6:10 p.m.-11:20 a.m.

1 stop19h 10m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 322

TorontoDenver

YTZ Toronto Island - DEN Denver Intl

YTZDEN

Toronto Island

Tue 27/10

4:35 p.m.-10:52 p.m.

1 stop8h 17m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 323

TorontoDenver

YTZ Toronto Island - DEN Denver Intl

YTZDEN

Toronto Island

Wed 7/10

10:50 a.m.-5:16 p.m.

1 stop8h 26m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 329

TorontoDenver

YTZ Toronto Island - DEN Denver Intl

YTZDEN

Toronto Island

Thu 29/10

4:35 p.m.-8:26 a.m.

1 stop17h 51m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 330
Quickest round-trip

TorontoDenver

YYZ Toronto Pearson Intl - DEN Denver Intl

YYZDEN

Toronto Pearson Intl

Wed 7/10

6:40 p.m.-8:17 p.m.

Nonstop3h 37m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 334

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

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

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, October is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of C$ 660). Flying from Region of Ontario to Denver in January is currently the most expensive (average of C$ 933). 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?

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

The most flights from CAON to DEN are scheduled on a Wednesday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Region of Ontario to Denver?

Airfare is below average for this route at the moment.
Region of Ontario to Denver flights typically cost between C$ 616 and C$ 810 in October.
The cheapest round-trip price found within the last 5 days was C$ 554 on American Airlines (7 Oct-13 Oct).

How far ahead should I book a flight from Region of Ontario to Denver?

The best time to book flights from Region of Ontario to Denver is 68 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

  • 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 38m. Delta provides one of the quickest options available for as low as C$ 623. Airlines will cover a distance of 2111 km. This flight may include one or multiple stops.

  • 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: Air Canada (66%), United Airlines (66%), Brussels Airlines( 38%).

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

    On average you can expect to pay C$ 1,257 for a flight from Region of Ontario to Denver. The cheapest flight overall is C$ 262 while the most popular route, (Toronto Pearson Intl - Denver Intl) is currently priced at C$ 484.

  • 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, October is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of C$ 660). Flying from Region of Ontario to Denver in January is currently the most expensive (average of C$ 933). 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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Top 3 airlines flying from Ontario to Denver

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 380AverageC$ 768FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 409AverageC$ 454FlexibilityNo cancel feeOn-time60%
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Air CanadaCheapestC$ 444AverageC$ 754FlexibilityNo cancel feeOn-time67%
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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?

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

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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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