What is the cheapest airline that flies from Ontario to Denver Intl?

WestJet, Delta, and Air Canada are the most popular carriers operating from Ontario to Denver Intl

How many flights depart from Region of Ontario to Denver on average per week?

80 flights are operational weekly from Region of Ontario to Denver as of March 2026. The most popular departure day for this route is Mon, with 16% of flights per week taking off on this day.

How long does it take to fly to Denver?

If you’re flying from a popular airport in Region of Ontario, such as Ottawa or Toronto, and flying into Denver, then you can expect flight times to average 6h 06m and 8h 49m, respectively.

How many flights depart from Region of Ontario to Denver on average per day?

As of March 2026, there are 11 flights per day flying from Region of Ontario to Denver. The most common time of day flights depart is 8:00a.m., with 66% of flights taking off in the afternoon.

Which airlines fly to Denver?

Air Canada, United Airlines and WestJet are the top three most popular airlines that fly to Denver from Region of Ontario according to our data. Air Canada is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Denver. Keep in mind that there are 3 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario to Denver Intl Airport?

Prices for flights from Ontario to Denver Intl Airport were last updated today.

How many operators does momondo search for flights from Ontario to Denver Intl Airport?

As of March 2026, there are 4 operators available to choose from for flights from Ontario to Denver Intl Airport.

How old do you have to be to fly from Ontario to Denver Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

C$ 209 Cheap Flights from Ontario to Denver in 2026

1 adult

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Find the cheapest flights from Ontario to Denver

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:45 a.m. - 3:25 a.m.

YYZ

DEN

19h 40m

1 stop

6:10 a.m. - 1:05 a.m.

DEN

YYZ

16h 55m

2 stops

C$ 490Multiple Airlines

Sun, 7 Jun - Thu, 11 Jun

9:45 a.m. - 3:25 a.m.

YYZ

DEN

19h 40m

1 stop

10:29 p.m. - 8:00 p.m.

DEN

YYZ

19h 31m

1 stop

C$ 495Multiple Airlines

Sun, 7 Jun - Thu, 11 Jun

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

YUL

DEN

13h 35m

1 stop

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

DEN

YUL

12h 45m

1 stop

C$ 568Delta

Tue, 21 Apr - Tue, 28 Apr

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

YUL

DEN

13h 35m

1 stop

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

DEN

YUL

12h 45m

1 stop

C$ 576Delta

Tue, 21 Apr - Tue, 28 Apr

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

YKF

DEN

16h 40m

1 stop

12:15 p.m. - 7:50 p.m.

DEN

YKF

29h 35m

1 stop

C$ 611WestJet

Wed, 22 Jul - Wed, 5 Aug

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

YKF

DEN

16h 40m

1 stop

12:15 p.m. - 7:50 p.m.

DEN

YKF

29h 35m

1 stop

C$ 612WestJet

Sun, 7 Jun - Wed, 10 Jun

4:05 p.m. - 8:28 p.m.

YQG

DEN

6h 23m

1 stop

11:30 a.m. - 7:09 p.m.

DEN

YQG

5h 39m

1 stop

C$ 697Air Canada

Fri, 8 May - Tue, 12 May

4:05 p.m. - 8:28 p.m.

YQG

DEN

6h 23m

1 stop

11:30 a.m. - 7:09 p.m.

DEN

YQG

5h 39m

1 stop

C$ 698Air Canada

Fri, 8 May - Tue, 12 May

3:10 p.m. - 10:15 p.m.

YOW

DEN

9h 05m

1 stop

5:59 p.m. - 10:03 a.m.

DEN

YOW

14h 04m

1 stop

C$ 772United Airlines

Thu, 23 Apr - Fri, 1 May

7:30 p.m. - 12:44 a.m.

YOW

DEN

7h 14m

1 stop

11:59 p.m. - 10:03 a.m.

DEN

YOW

8h 04m

1 stop

C$ 774United Airlines

Thu, 23 Apr - Fri, 1 May

Delta flights from Region of Ontario to Denver

Our best Delta deals on Region of Ontario to Denver flight tickets

Delta

21 Apr

YUL9:30 a.m.Montreal Pierre Elliott Trudeau Intl

13h 35m

1 stop

DEN9:05 p.m.Denver Intl

28 Apr

DEN5:55 p.m.Denver Intl

12h 45m

1 stop

YUL8:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 568

Delta

21 Apr

YUL9:30 a.m.Montreal Pierre Elliott Trudeau Intl

13h 35m

1 stop

DEN9:05 p.m.Denver Intl

28 Apr

DEN5:55 p.m.Denver Intl

12h 45m

1 stop

YUL8:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 576

Delta

19 Apr

YYZ2:15 p.m.Toronto Pearson Intl

9h 12m

1 stop

DEN9:27 p.m.Denver Intl

21 Apr

DEN11:47 a.m.Denver Intl

9h 56m

1 stop

YYZ11:43 p.m.Toronto Pearson Intl

C$ 579

United Airlines flights from Region of Ontario to Denver

Our best United Airlines deals on Region of Ontario to Denver flight tickets

United Airlines

10 Apr

YUL6:35 p.m.Montreal Pierre Elliott Trudeau Intl

8h 09m

1 stop

DEN12:44 a.m.Denver Intl

13 Apr

DEN5:44 p.m.Denver Intl

14h 56m

1 stop

YUL10:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 650

United Airlines

1 May

YUL5:00 p.m.Montreal Pierre Elliott Trudeau Intl

8h 50m

1 stop

DEN11:50 p.m.Denver Intl

2 May

DEN6:00 a.m.Denver Intl

8h 10m

1 stop

YUL4:10 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 651

United Airlines

7 Jun

YTZ7:20 p.m.Toronto Island

7h 33m

1 stop

DEN12:53 a.m.Denver Intl

10 Jun

DEN11:30 a.m.Denver Intl

6h 39m

1 stop

YTZ8:09 p.m.Toronto Island

C$ 689

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sun 7/6

9:45 a.m.-3:25 a.m.

1 stop19h 40m

Denver Intl

Thu 11/6

6:10 a.m.-1:05 a.m.

2 stops16h 55m

C$ 490

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sun 7/6

9:45 a.m.-3:25 a.m.

1 stop19h 40m

Denver Intl

Thu 11/6

10:29 p.m.-8:00 p.m.

1 stop19h 31m

C$ 495

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

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

1 stop13h 35m

Denver Intl

Tue 28/4

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

1 stop12h 45m

C$ 568

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

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

1 stop13h 35m

Denver Intl

Tue 28/4

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

1 stop12h 45m

C$ 576

TorontoDenver

YKF - DEN

YKFDEN

Toronto Region of Waterloo Intl

Wed 22/7

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

1 stop16h 40m

Denver Intl

Wed 5/8

12:15 p.m.-7:50 p.m.

1 stop29h 35m

C$ 611

TorontoDenver

YKF - DEN

YKFDEN

Toronto Region of Waterloo Intl

Sun 7/6

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

1 stop16h 40m

Denver Intl

Wed 10/6

12:15 p.m.-7:50 p.m.

1 stop29h 35m

C$ 612

Quickest round-trip

WindsorDenver

YQG - DEN

YQGDEN

Windsor

Fri 8/5

4:05 p.m.-8:28 p.m.

1 stop6h 23m

Denver Intl

Tue 12/5

11:30 a.m.-7:09 p.m.

1 stop5h 39m

C$ 697

WindsorDenver

YQG - DEN

YQGDEN

Windsor

Fri 8/5

4:05 p.m.-8:28 p.m.

1 stop6h 23m

Denver Intl

Tue 12/5

11:30 a.m.-7:09 p.m.

1 stop5h 39m

C$ 698

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 23/4

3:10 p.m.-10:15 p.m.

1 stop9h 05m

Denver Intl

Fri 1/5

5:59 p.m.-10:03 a.m.

1 stop14h 04m

C$ 772

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 23/4

7:30 p.m.-12:44 a.m.

1 stop7h 14m

Denver Intl

Fri 1/5

11:59 p.m.-10:03 a.m.

1 stop8h 04m

C$ 774

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Region of Ontario to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Denver?

In general, November is the cheapest month to fly from Region of Ontario to Denver. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 548. If you aren’t able to travel during the month of November, then book flights to Denver from Region of Ontario during August instead. Flights to Denver in August, while not as cheap as those in November, still average around C$ 576.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart from Region of Ontario to Denver is on a Friday. Travellers who choose to depart for Denver on a Friday will often find tickets for as low as C$ 702. On the other hand, Sunday is the most expensive day to depart from Region of Ontario because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,044.

What is the cheapest time of day to depart on your flight to Denver?

Our most recent data shows that the best time of day to fly to Denver is in the morning. Flights from Region of Ontario to Denver during this time can be as low as C$ 761. Try not to purchase tickets at noon because they tend to be around C$ 1,139. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Denver Intl flight route?

Fly from Toronto Pearson Intl to Denver Intl for the best Ontario - Denver Intl flight prices

How far in advance should I book a flight to Denver?

You are more likely to see cheaper flights to Denver from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around C$ 656 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Region of Ontario for as low as C$ 480 on momondo.

What cabin class options are available on Ontario to Denver Intl flights?

There are 4 cabin classes available to choose from on Ontario to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Denver flights?

You could potentially save up to 27% on your flight if you consider stops on a Region of Ontario to Denver flight.

Cheap Region of Ontario to Denver flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Denver

Best price found	C$ 332
Fastest flight time	3h 38m
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from Region of Ontario in the past 72 hours is C$ 332. The best round-trip flight deal from Region of Ontario to Denver found on momondo in the last 72 hours is C$ 607.

The fastest flight from Region of Ontario to Denver takes 3h 38m

Direct flights go from Region of Ontario to Denver every day.

There is 1 airport in Denver. From Region of Ontario there are direct flights to Denver Intl (DEN).

Search flight deals

When did momondo last update prices for flights from Ontario to Denver Intl Airport?
Prices for flights from Ontario to Denver Intl Airport were last updated today.
How many operators does momondo search for flights from Ontario to Denver Intl Airport?
As of March 2026, there are 4 operators available to choose from for flights from Ontario to Denver Intl Airport.
How old do you have to be to fly from Ontario to Denver Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Region of Ontario to Denver?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Region of Ontario to Denver is Airbus A220-300 (31.15% of total bookings). The next most popular plane models are Embraer 195 E2 (21.81%), Airbus A319 (19.43%), and Airbus A320-100/200 (4.95%).

Best airlines flying from Region of Ontario to Denver

Compare and see reviews for airlines that fly from Region of Ontario to Denver with momondo

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom C$ 258	Free Cancellation	Rating 7.2 3,308 reviews	Search WestJet flights
United Airlines	PriceFrom C$ 307	Free Cancellation	Rating 7.4 9,525 reviews	Search United Airlines flights
Air Canada	PriceFrom C$ 388	Free Cancellation	Rating 7.1 10,866 reviews	Search Air Canada flights

Keystone

Wheat Ridge

Winter Park

Lakewood

Longmont

Silverthorne

Boulder

Englewood

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Denver?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Denver for you.

Can I find flights from Ontario to Denver with flexible booking policies on momondo?

momondo does allow users to show only those flights to Denver from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Denver?

Once all potential Ontario to Denver flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Denver right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Denver, momondo offers a useful price alert feature which will track prices for flights to Denver from Ontario and alert you when they change.

An easier way to manage your Denver trip

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Cheap flights from Ontario to Denver from C$ 209

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Denver departing on 11/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Region of Ontario to Denver

Our best Delta deals on Region of Ontario to Denver flight tickets

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How to get the cheapest flight ticket from Region of Ontario to Denver

What is the cheapest month to fly to Denver?

What is the cheapest day to depart on your flight to Denver?

What is the cheapest time of day to depart on your flight to Denver?

What is the cheapest Ontario to Denver Intl flight route?

How far in advance should I book a flight to Denver?

What cabin class options are available on Ontario to Denver Intl flights?

Can stopping save me money on Region of Ontario to Denver flights?

What is the cheapest airline that flies from Ontario to Denver Intl?

Which airlines fly to Denver?

How many flights depart from Region of Ontario to Denver on average per day?

How many flights depart from Region of Ontario to Denver on average per week?

How long does it take to fly to Denver?

Cheap Region of Ontario to Denver flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Denver

Best price found

Fastest flight time

Direct flights

Airports in Denver

Best airlines flying from Region of Ontario to Denver

Compare and see reviews for airlines that fly from Region of Ontario to Denver with momondo

Travelling to a place near Denver?

Why use momondo?

An easier way to manage your Denver trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Colorado

Fly your favourite airline to Denver

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Denver

List of cabin classes available on flights landing in Denver. Availability may vary depending on flight origin and airline.

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