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Cheap flights from Ontario to Denver from C$ 190

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 6/10. 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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Find the cheapest flights from Ontario to Denver

Cheap round-trip flights

United Airlines Logo
5:15 a.m. - 10:23 a.m.YOW-DEN
7h 08m1 stop
United Airlines Logo
6:00 a.m. - 4:30 p.m.DEN-YOW
8h 30m1 stop
C$ 364United Airlines
Find Deal
Thu, 19 Feb - Tue, 24 Feb
United Airlines Logo
6:20 a.m. - 3:57 p.m.YOW-DEN
11h 37m1 stop
United Airlines Logo
6:00 a.m. - 4:30 p.m.DEN-YOW
8h 30m1 stop
C$ 376United Airlines
Find Deal
Tue, 3 Mar - Wed, 4 Mar
Logo
5:30 p.m. - 11:24 a.m.YUL-DEN
19h 54m1 stop
Logo
8:00 a.m. - 12:41 a.m.DEN-YUL
14h 41m2 stops
C$ 392
Find Deal
Sat, 27 Sep - Sat, 11 Oct
WestJet Logo
7:00 a.m. - 11:24 a.m.YUL-DEN
30h 24m1 stop
WestJet Logo
12:15 p.m. - 12:27 a.m.DEN-YUL
34h 12m2 stops
C$ 403WestJet
Find Deal
Sat, 27 Sep - Mon, 29 Sep
Logo
5:30 p.m. - 11:24 a.m.YUL-DEN
19h 54m1 stop
Logo
8:00 a.m. - 12:27 a.m.DEN-YUL
14h 27m2 stops
C$ 406
Find Deal
Sat, 27 Sep - Wed, 8 Oct
WestJet Logo
6:45 a.m. - 11:24 a.m.YUL-DEN
30h 39m2 stops
WestJet Logo
12:15 p.m. - 12:27 a.m.DEN-YUL
34h 12m2 stops
C$ 419WestJet
Find Deal
Sat, 27 Sep - Mon, 29 Sep
Air Canada Logo
8:30 a.m. - 10:23 a.m.YYZ-DEN
3h 53mdirect
Air Canada Logo
8:45 a.m. - 7:39 p.m.DEN-YYZ
8h 54m1 stop
C$ 429Air Canada
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Air Canada Logo
7:30 a.m. - 5:44 p.m.YUL-DEN
12h 14m1 stop
Air Canada Logo
8:45 a.m. - 9:00 p.m.DEN-YUL
10h 15m1 stop
C$ 432Air Canada
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Delta Logo
7:55 a.m. - 4:47 p.m.YYZ-DEN
10h 52m1 stop
Delta Logo
5:45 a.m. - 5:19 p.m.DEN-YYZ
9h 34m1 stop
C$ 453Delta
Find Deal
Wed, 8 Oct - Wed, 15 Oct
Delta Logo
11:52 a.m. - 8:15 p.m.YYZ-DEN
10h 23m1 stop
Delta Logo
11:59 p.m. - 11:21 a.m.DEN-YYZ
9h 22m1 stop
C$ 455Delta
Find Deal
Sat, 11 Oct - Tue, 21 Oct

United Airlines flights from Region of Ontario to Denver

Our best United Airlines deals on Region of Ontario to Denver flight tickets
United Airlines
19 Feb
YOW5:15 a.m.Ottawa
7h 08m
1 stop
DEN10:23 a.m.Denver Intl
24 Feb
DEN6:00 a.m.Denver Intl
8h 30m
1 stop
YOW4:30 p.m.Ottawa
C$ 364
Find similar
United Airlines
3 Mar
YOW6:20 a.m.Ottawa
11h 37m
1 stop
DEN3:57 p.m.Denver Intl
4 Mar
DEN6:00 a.m.Denver Intl
8h 30m
1 stop
YOW4:30 p.m.Ottawa
C$ 376
Find similar
United Airlines
2 Dec
YOW5:15 a.m.Ottawa
7h 08m
1 stop
DEN10:23 a.m.Denver Intl
8 Dec
DEN4:10 p.m.Denver Intl
16h 16m
1 stop
YOW10:26 a.m.Ottawa
C$ 378
Find similar

WestJet flights from Region of Ontario to Denver

Our best WestJet deals on Region of Ontario to Denver flight tickets
WestJet
27 Sep
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
30h 24m
1 stop
DEN11:24 a.m.Denver Intl
29 Sep
DEN12:15 p.m.Denver Intl
34h 12m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 403
Find similar
WestJet
27 Sep
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
30h 39m
2 stops
DEN11:24 a.m.Denver Intl
29 Sep
DEN12:15 p.m.Denver Intl
34h 12m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 419
Find similar
WestJet
27 Sep
YUL5:30 p.m.Montreal Pierre Elliott Trudeau Intl
19h 54m
1 stop
DEN11:24 a.m.Denver Intl
6 Oct
DEN12:15 p.m.Denver Intl
34h 12m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 428
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of 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, momondo users made 96,600 searches. Data last updated 15 September 2025.
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

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 19/2

5:15 a.m.-10:23 a.m.

1 stop7h 08m

Denver Intl

Tue 24/2

6:00 a.m.-4:30 p.m.

1 stop8h 30m

C$ 364

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 3/3

6:20 a.m.-3:57 p.m.

1 stop11h 37m

Denver Intl

Wed 4/3

6:00 a.m.-4:30 p.m.

1 stop8h 30m

C$ 376

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Sat 27/9

5:30 p.m.-11:24 a.m.

1 stop19h 54m

Denver Intl

Sat 11/10

8:00 a.m.-12:41 a.m.

2 stops14h 41m

C$ 392

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Sat 27/9

7:00 a.m.-11:24 a.m.

1 stop30h 24m

Denver Intl

Mon 29/9

12:15 p.m.-12:27 a.m.

2 stops34h 12m

C$ 403

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Sat 27/9

5:30 p.m.-11:24 a.m.

1 stop19h 54m

Denver Intl

Wed 8/10

8:00 a.m.-12:27 a.m.

2 stops14h 27m

C$ 406

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Sat 27/9

6:45 a.m.-11:24 a.m.

2 stops30h 39m

Denver Intl

Mon 29/9

12:15 p.m.-12:27 a.m.

2 stops34h 12m

C$ 419

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Wed 29/10

8:30 a.m.-10:23 a.m.

Nonstop3h 53m

Denver Intl

Wed 5/11

8:45 a.m.-7:39 p.m.

1 stop8h 54m

C$ 429

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Thu 30/10

7:30 a.m.-5:44 p.m.

1 stop12h 14m

Denver Intl

Thu 6/11

8:45 a.m.-9:00 p.m.

1 stop10h 15m

C$ 432

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Wed 8/10

7:55 a.m.-4:47 p.m.

1 stop10h 52m

Denver Intl

Wed 15/10

5:45 a.m.-5:19 p.m.

1 stop9h 34m

C$ 453

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sat 11/10

11:52 a.m.-8:15 p.m.

1 stop10h 23m

Denver Intl

Tue 21/10

11:59 p.m.-11:21 a.m.

1 stop9h 22m

C$ 455

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Denver from

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

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$ 583. If you aren’t able to travel during the month of November, then book flights to Denver from Region of Ontario during October instead. Flights to Denver in October, while not as cheap as those in November, still average around C$ 585.

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$ 709. On the other hand, Monday 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$ 1,038.

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 evening. Flights from Region of Ontario to Denver during this time can be as low as C$ 631. Try not to purchase tickets in the morning because they tend to be around C$ 808. 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$ 637 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$ 556 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 24% 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$ 406

Fastest flight time

3h 34m

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$ 406. The best round-trip flight deal from Region of Ontario to Denver found on momondo in the last 72 hours is C$ 577.
The fastest flight from Region of Ontario to Denver takes 3h 34m
Direct flights go from Region of Ontario to Denver every day.
There is 1 airport near Denver: 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?

  • 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?

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
WestJetPriceFrom C$ 260Free CancellationRating
7.2
3,091 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 305Free CancellationRating
7.4
8,931 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 367Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Silverthorne
Wheat Ridge
Winter Park
Lakewood
Longmont
Boulder
Fort Collins
Littleton
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

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.
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