How does KAYAK find such low prices on flights from Ontario to Denver?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Denver.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Denver?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Ontario to Denver?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Ontario with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Denver?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

C$ 233 CHEAP FLIGHTS from Ontario to Denver

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from Ontario to Denver

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to Denver

Sun, 20 Sep - Sun, 27 Sep

8:00 p.m. - 11:20 a.m.YUL Montreal Pierre Elliott Trudeau Intl-DEN Denver Intl

17h 20m1 stop Calgary

12:15 p.m. - 11:45 p.m.DEN Denver Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 30m1 stop Calgary

C$ 428WestJet

Wed, 23 Sep - Sun, 27 Sep

8:00 p.m. - 11:20 a.m.YUL Montreal Pierre Elliott Trudeau Intl-DEN Denver Intl

17h 20m1 stop Calgary

12:15 p.m. - 11:45 p.m.DEN Denver Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 30m1 stop Calgary

C$ 465WestJet

Sat, 17 Oct - Thu, 22 Oct

4:15 p.m. - 11:20 a.m.YOW Ottawa-DEN Denver Intl

21h 05m1 stop Calgary

10:44 p.m. - 5:35 a.m.DEN Denver Intl-YOW Ottawa

28h 51m2 stops Phoenix Sky Harbor Intl Calgary

C$ 469Multiple Airlines

Wed, 7 Oct - Sun, 11 Oct

8:00 p.m. - 11:20 a.m.YUL Montreal Pierre Elliott Trudeau Intl-DEN Denver Intl

17h 20m1 stop Calgary

12:15 p.m. - 11:45 p.m.DEN Denver Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 30m1 stop Calgary

C$ 470WestJet

Wed, 7 Oct - Wed, 14 Oct

8:15 p.m. - 11:20 a.m.YOW Ottawa-DEN Denver Intl

17h 05m1 stop Calgary

10:44 p.m. - 5:35 a.m.DEN Denver Intl-YOW Ottawa

28h 51m2 stops Phoenix Sky Harbor Intl Calgary

C$ 473Multiple Airlines

Sat, 17 Oct - Sat, 24 Oct

4:15 p.m. - 11:20 a.m.YOW Ottawa-DEN Denver Intl

21h 05m1 stop Calgary

1:07 p.m. - 5:35 a.m.DEN Denver Intl-YOW Ottawa

14h 28m2 stops Seattle/Tacoma Intl Calgary

C$ 487Multiple Airlines

Fri, 2 Oct - Sun, 4 Oct

8:50 a.m. - 10:27 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

11:25 a.m. - 7:53 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

6h 28m1 stop Montreal Pierre Elliott Trudeau Intl

C$ 563Air Canada

Thu, 29 Oct - Thu, 5 Nov

2:00 p.m. - 8:27 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

8h 27m1 stop Montreal Pierre Elliott Trudeau Intl

8:15 a.m. - 7:57 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

9h 42m1 stop Vancouver Intl

C$ 565Air Canada

Fri, 25 Sep - Tue, 29 Sep

4:18 p.m. - 5:56 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

10:02 a.m. - 3:14 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 12mdirect

C$ 709United Airlines

Fri, 25 Sep - Wed, 30 Sep

10:45 a.m. - 12:23 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

4:17 p.m. - 9:32 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 15mdirect

C$ 709United Airlines

Recent last minute flight deals from Ontario to Denver

Tue, 15 Sep - Sat, 26 Sep

6:55 a.m. - 7:05 p.m.YOW Ottawa-DEN Denver Intl

14h 10m2 stops Toronto Pearson Intl Atlanta Hartsfield-Jackson

6:30 a.m. - 5:35 p.m.DEN Denver Intl-YOW Ottawa

9h 05m2 stops Detroit Metropolitan Wayne County Toronto Pearson Intl

C$ 578Delta

Thu, 10 Sep - Fri, 11 Sep

8:45 a.m. - 10:22 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

6:05 p.m. - 11:16 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 666Air Canada

Sat, 12 Sep - Sun, 11 Oct

6:40 p.m. - 8:17 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

6:05 p.m. - 11:16 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 731Air Canada

Sat, 12 Sep - Sun, 11 Oct

6:40 p.m. - 8:17 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

11:25 a.m. - 7:53 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

6h 28m1 stop Montreal Pierre Elliott Trudeau Intl

C$ 735Air Canada

Sat, 12 Sep - Sun, 11 Oct

6:00 a.m. - 6:15 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

14h 15m2 stops Calgary Phoenix Sky Harbor Intl

10:38 a.m. - 9:55 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

9h 17m1 stop Nashville Intl

C$ 754Multiple Airlines

Sun, 13 Sep - Sun, 20 Sep

7:15 a.m. - 4:18 p.m.YUL Montreal Pierre Elliott Trudeau Intl-DEN Denver Intl

35h 03m2 stops Calgary Portland

12:15 p.m. - 11:45 p.m.DEN Denver Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 30m1 stop Calgary

C$ 767Multiple Airlines

Tue, 15 Sep - Fri, 18 Sep

10:20 p.m. - 11:20 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

39h 00m2 stops Edmonton Calgary

12:15 p.m. - 10:45 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

8h 30m1 stop Calgary

C$ 909WestJet

Tue, 15 Sep - Fri, 18 Sep

10:20 p.m. - 11:20 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

39h 00m2 stops Edmonton Calgary

12:15 p.m. - 10:45 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

8h 30m1 stop Calgary

C$ 912WestJet

Tue, 15 Sep - Sat, 26 Sep

5:57 p.m. - 11:15 p.m.YOW Ottawa-DEN Denver Intl

7h 18m1 stop Newark

5:00 a.m. - 4:38 p.m.DEN Denver Intl-YOW Ottawa

9h 38m2 stops Houston George Bush Intcntl Newark

C$ 1,033United Airlines

Tue, 15 Sep - Sat, 26 Sep

5:57 p.m. - 11:15 p.m.YOW Ottawa-DEN Denver Intl

7h 18m1 stop Newark

11:52 p.m. - 9:56 a.m.DEN Denver Intl-YOW Ottawa

8h 04m1 stop Washington, D.C. Dulles Intl

C$ 1,033United Airlines

Recent direct flight deals from Ontario to Denver

Wed, 7 Oct - Tue, 13 Oct

6:40 p.m. - 8:17 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

6:05 p.m. - 11:16 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 572Air Canada

Thu, 1 Oct - Sun, 4 Oct

8:50 a.m. - 10:27 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

11:35 a.m. - 4:45 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 10mdirect

C$ 572Air Canada

Tue, 29 Sep - Fri, 2 Oct

8:45 a.m. - 10:22 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 37mdirect

6:05 p.m. - 11:16 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 572Air Canada

Fri, 30 Oct - Sun, 8 Nov

8:40 a.m. - 10:35 a.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 55mdirect

5:40 p.m. - 10:51 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 572Air Canada

Thu, 1 Oct - Mon, 5 Oct

4:18 p.m. - 5:56 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

6:05 p.m. - 11:16 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 644Multiple Airlines

Sat, 17 Oct - Sun, 18 Oct

4:18 p.m. - 5:56 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

6:05 p.m. - 11:16 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 11mdirect

C$ 644Multiple Airlines

Sat, 26 Sep - Tue, 6 Oct

10:45 a.m. - 12:23 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

11:35 a.m. - 4:45 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 10mdirect

C$ 658Multiple Airlines

Fri, 25 Sep - Tue, 29 Sep

4:18 p.m. - 5:56 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

10:02 a.m. - 3:14 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 12mdirect

C$ 709United Airlines

Fri, 25 Sep - Wed, 30 Sep

10:45 a.m. - 12:23 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 38mdirect

4:17 p.m. - 9:32 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 15mdirect

C$ 709United Airlines

Mon, 15 Feb - Thu, 18 Feb

4:00 p.m. - 5:46 p.m.YYZ Toronto Pearson Intl-DEN Denver Intl

3h 46mdirect

9:58 a.m. - 3:12 p.m.DEN Denver Intl-YYZ Toronto Pearson Intl

3h 14mdirect

C$ 712United Airlines

Useful Info

Low season	January
High season	June
Cheapest flight	C$ 233

Best time to beat the crowds (6% less expensive on average)

Most popular time to fly and prices are also 8% lower on average.

Flight from Toronto Pearson Airport to Denver

F.Flew with United Airlines-Aug 2024

Make sure to check the airline delay flights rate and if you have important commitments choose another airline.

JoshuaFlew with Air Canada-Apr 2024

Toronto's customs was one of the faster experiences I've had. They opened four more lanes to expedite the process when the lane got too long, to ensure we would all get through within around 15 minutes. The public transportation within the city is also top notch, in my opinion.

How does KAYAK find such low prices on flights from Ontario to Denver?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Denver.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Denver?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Ontario to Denver?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Ontario with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Denver?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Aurora

Estes Park

Fort Collins

Longmont

Silverthorne

Lakewood

Golden

Breckenridge

Manitou Springs

Keystone

Littleton

Broomfield

Frisco

Lone Tree

Centennial

Westminster

Winter Park

Georgetown

Brighton

Wheat Ridge

More options for your flight to Denver

Add a hotel or car rental

Airports

Cabin class

Origins

Other destinations

Return flight

Complete your trip to Denver with a hotel stay or car rental

Car rentals in Denver

DEN

C$ 233 Find Cheap Flights from Ontario to Denver – Compare and Save

Cheap Flights from Ontario to Denver

Recent round-trip flight deals from Ontario to Denver

Recent one-way flight deals from Ontario to Denver

Recent last minute flight deals from Ontario to Denver

Recent direct flight deals from Ontario to Denver

Good to know

Low season

High season

Cheapest flight

Flights from Ontario to Denver: the best tips from KAYAK users

FAQs for booking flights from Ontario to Denver

Travelling to a place near Denver?

More options for your flight to Denver

Complete your trip to Denver with a hotel stay or car rental

Information on the airport you'll fly into in Denver

Cabin class types available on flights to Ontario

Flights from domestic origins to Denver

Flights to other popular destinations

Find deals for your return flight