Find flights
Deals
When to book
FAQs

Cheap flights from Ontario to Denver from C$ 204

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Denver

Keep the following information in mind while searching for Ontario to Denver flight deals. Data was last updated 30 October 2025.

Round-trip from

C$ 458

One-way from

C$ 204

Popular in

December

Cheapest in

November

Average price

C$ 663

Good round-trip deal

C$ 627 or less

Good one-way deal

C$ 384 or less
American Airlines
  • American Airlines
  • 20/1-26/1
  • 2 total stops
  • 41h 35m total
  • Ontario to Denver
Search Deals
26/1
  • 26/1
  • 1 total stop
  • 17h 54m total
  • Ontario to Denver
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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

Find 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 30 October 2025.

Mon 15/123:55 p.m.YOW - DEN
1 stop11h 28mMultiple Airlines
Wed 24/1210:37 p.m.DEN - YOW
2 stops47h 21mMultiple Airlines
Deal found 28/10C$ 471
Tue 9/125:10 p.m.YUL - DEN
1 stop27h 59mMultiple Airlines
Mon 15/1211:59 p.m.DEN - YUL
2 stops17h 45mMultiple Airlines
Deal found 28/10C$ 480
Fri 12/127:55 p.m.YYZ - DEN
1 stop10h 03mMultiple Airlines
Wed 7/14:25 p.m.DEN - YYZ
1 stop13h 30mMultiple Airlines
Deal found 28/10C$ 483
Tue 2/127:45 p.m.YYZ - DEN
1 stop25h 24mMultiple Airlines
Thu 4/1211:59 p.m.DEN - YYZ
1 stop18h 01mMultiple Airlines
Deal found 30/10C$ 486
Tue 9/124:45 p.m.YYZ - DEN
1 stop27h 18mAlaska Airlines
Tue 6/18:22 p.m.DEN - YYZ
1 stop17h 13mAlaska Airlines
Deal found 28/10C$ 489
Sun 14/128:00 p.m.YYZ - DEN
1 stop9h 58mMultiple Airlines
Tue 6/111:59 p.m.DEN - YYZ
1 stop9h 47mMultiple Airlines
Deal found 28/10C$ 490
Thu 20/1112:30 p.m.YTZ - DEN
1 stop9h 25mAir Canada
Wed 26/1111:15 a.m.DEN - YTZ
1 stop8h 20mAir Canada
Deal found 28/10C$ 492
Mon 17/117:55 p.m.YYZ - DEN
1 stop10h 04mMultiple Airlines
Mon 24/119:44 a.m.DEN - YYZ
2 stops19h 14mMultiple Airlines
Deal found 28/10C$ 492
Thu 20/115:25 p.m.YUL - DEN
Nonstop4h 30mAir Canada
Wed 26/1111:15 a.m.DEN - YUL
Nonstop3h 43mAir Canada
Deal found 29/10C$ 493
Thu 11/127:55 p.m.YYZ - DEN
1 stop10h 03mMultiple Airlines
Tue 6/111:59 p.m.DEN - YYZ
1 stop9h 47mMultiple Airlines
Deal found 28/10C$ 493
Tue 25/1112:40 p.m.YYZ - DEN
1 stop17h 18mMultiple Airlines
Tue 2/1210:50 a.m.DEN - YYZ
2 stops35h 21mMultiple Airlines
Deal found 27/10C$ 494
Mon 8/124:45 p.m.YYZ - DEN
1 stop9h 14mAlaska Airlines
Tue 6/16:02 a.m.DEN - YYZ
1 stop31h 33mAlaska Airlines
Deal found 28/10C$ 500

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 30 October 2025.
Use the filters below to find and compare flights from Ontario to Denver that are best for you.

Fly from

Ontario

Fly to

Denver

Route

Depart

Return

Price

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Thu 20/11

12:30 p.m.-7:55 p.m.

1 stop9h 25m

Denver Intl

Wed 26/11

11:15 a.m.-9:35 p.m.

1 stop8h 20m

C$ 492

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Fri 30/1

9:15 a.m.-9:50 p.m.

1 stop14h 35m

Denver Intl

Wed 4/2

7:00 a.m.-10:10 p.m.

2 stops13h 10m

C$ 497

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Wed 12/11

9:15 a.m.-7:59 p.m.

1 stop12h 44m

Denver Intl

Thu 13/11

12:59 a.m.-6:55 p.m.

2 stops15h 56m

C$ 501

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Fri 14/11

9:15 a.m.-2:16 p.m.

1 stop7h 01m

Denver Intl

Mon 17/11

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

1 stop8h 52m

C$ 501

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 15/12

9:25 a.m.-1:23 a.m.

1 stop17h 58m

Denver Intl

Wed 24/12

4:25 p.m.-5:25 p.m.

1 stop23h 00m

C$ 553

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Wed 4/2

12:30 p.m.-7:55 p.m.

1 stop9h 25m

Denver Intl

Wed 11/2

11:15 a.m.-9:35 p.m.

1 stop8h 20m

C$ 556

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Thu 20/11

12:30 p.m.-7:55 p.m.

1 stop9h 25m

Denver Intl

Thu 27/11

11:15 a.m.-9:35 p.m.

1 stop8h 20m

C$ 556

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Tue 18/11

12:30 p.m.-7:55 p.m.

1 stop9h 25m

Denver Intl

Tue 25/11

11:15 a.m.-7:55 p.m.

1 stop6h 40m

C$ 556

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sun 1/2

4:45 p.m.-11:38 a.m.

2 stops20h 53m

Denver Intl

Sun 8/2

7:00 a.m.-3:35 p.m.

1 stop30h 35m

C$ 560

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Tue 3/3

4:45 p.m.-11:39 a.m.

1 stop20h 54m

Denver Intl

Wed 4/3

7:50 p.m.-3:35 p.m.

1 stop17h 45m

C$ 560

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 60 results
1
2
3
...
6

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, November is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of C$ 279). Flying from Region of Ontario to Denver in May is currently the most expensive (average of C$ 412). 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 30 October 2025.

It’s typically best to fly out from Region of Ontario to Denver in the evening. Doing so could potentially save you 17% on the flight price compared to flying at noon, which is usually more expensive.

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 9h 25m. Air Canada provides one of the quickest options available for as low as C$ 492. Airlines will cover a distance of 2128 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: United Airlines (67%), Air Canada (65%), Brussels Airlines( 62%).

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

    On average you can expect to pay C$ 1,860 for a flight from Region of Ontario to Denver. The cheapest flight overall is C$ 259 while the most popular route, (Toronto Pearson Intl - Denver Intl) is currently priced at C$ 348.

  • 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, November is the cheapest month in which you can book a flight from Region of Ontario to Denver (average of C$ 279). Flying from Region of Ontario to Denver in May is currently the most expensive (average of C$ 412). 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
Westminster
Thornton

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 Ontario to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Denver flights
Vancouver Intl to Denver flights
Pierre Elliott Trudeau Intl to Denver flights
Calgary to Denver flights
Edmonton to Denver flights
Toronto Island to Denver flights
Winnipeg to Denver flights
Québec City to Denver flights
Ottawa to Denver flights
Regina to Denver flights
Pearson Intl to Colorado Springs flights
Region of Waterloo Intl to Denver flights
Victoria to Denver flights
Pearson Intl to Montrose flights
Pearson Intl to Aspen flights
Kelowna to Denver flights
Vancouver Intl to Vail flights
Vancouver Intl to Colorado Springs flights
Pierre Elliott Trudeau Intl to Colorado Springs flights
Halifax to Denver flights
Ottawa to Colorado Springs flights
Vancouver Intl to Aspen flights
Calgary to Colorado Springs flights
Vancouver Intl to Grand Junction flights
Hamilton to Denver flights
Pearson Intl to Durango flights
Saskatoon to Denver flights
St. John's to Denver flights
Prince George to Denver flights
Moncton to Denver flights
Pearson Intl to Vail flights
Pearson Intl to Gunnison flights
Pierre Elliott Trudeau Intl to Grand Junction flights
Victoria to Durango flights
Winnipeg to Colorado Springs flights
Windsor to Denver flights
Calgary to Aspen flights

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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 262AverageC$ 459FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 308AverageC$ 624FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 401AverageC$ 688FlexibilityNo 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.

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.