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Cheap flights from Ontario to Colorado from C$ 189

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 Colorado 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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Cheap round-trip flights

United Airlines Logo
5:50 p.m. - 11:15 p.m.YOW-DEN
7h 25m1 stop
United Airlines Logo
6:00 a.m. - 4:43 p.m.DEN-YOW
8h 43m1 stop
C$ 347United Airlines
Find Deal
Fri, 3 Oct - Wed, 22 Oct
United Airlines Logo
5:25 p.m. - 11:30 p.m.YOW-DEN
8h 05m1 stop
United Airlines Logo
8:28 p.m. - 2:04 p.m.DEN-YOW
15h 36m1 stop
C$ 362United Airlines
Find Deal
Thu, 2 Oct - Wed, 8 Oct
Multiple Airlines Logo
5:30 p.m. - 11:24 a.m.YUL-DEN
19h 54m1 stop
Multiple Airlines Logo
8:00 a.m. - 12:41 a.m.DEN-YUL
14h 41m2 stops
C$ 391Multiple Airlines
Find Deal
Sat, 27 Sep - Sat, 11 Oct
Multiple Airlines Logo
5:30 p.m. - 11:24 a.m.YUL-DEN
19h 54m1 stop
Multiple Airlines Logo
8:00 a.m. - 12:41 a.m.DEN-YUL
14h 41m2 stops
C$ 394Multiple Airlines
Find Deal
Sun, 12 Oct - Wed, 22 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$ 402WestJet
Find Deal
Sat, 27 Sep - Mon, 29 Sep
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
5:25 p.m. - 7:55 p.m.YUL-DEN
4h 30mdirect
Air Canada Logo
11:15 a.m. - 4:58 p.m.DEN-YUL
3h 43mdirect
C$ 425Air Canada
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Air Canada Logo
7:30 a.m. - 5:44 p.m.YUL-DEN
12h 14m1 stop
Air Canada Logo
11:15 a.m. - 4:58 p.m.DEN-YUL
3h 43mdirect
C$ 430Air Canada
Find Deal
Thu, 30 Oct - Thu, 6 Nov
American Airlines Logo
6:49 a.m. - 10:08 p.m.YYZ-COS
17h 19m1 stop
American Airlines Logo
5:16 p.m. - 12:30 p.m.COS-YYZ
17h 14m1 stop
C$ 452American Airlines
Find Deal
Sat, 27 Sep - Fri, 3 Oct
American Airlines Logo
6:30 a.m. - 6:33 p.m.YYZ-DEN
14h 03m1 stop
American Airlines Logo
7:16 a.m. - 11:25 p.m.DEN-YYZ
14h 09m1 stop
C$ 452American Airlines
Find Deal
Thu, 2 Oct - Sun, 5 Oct

Air Canada flights from Region of Ontario to Colorado

Our best Air Canada deals on Region of Ontario to Colorado flight tickets
Air Canada
30 Oct
YUL5:25 p.m.Montreal Pierre Elliott Trudeau Intl
4h 30m
DEN7:55 p.m.Denver Intl
6 Nov
DEN11:15 a.m.Denver Intl
3h 43m
YUL4:58 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 425
Find similar
Air Canada
30 Oct
YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl
12h 14m
1 stop
DEN5:44 p.m.Denver Intl
6 Nov
DEN11:15 a.m.Denver Intl
3h 43m
YUL4:58 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 430
Find similar
Air Canada
30 Oct
YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl
12h 14m
1 stop
DEN5:44 p.m.Denver Intl
6 Nov
DEN8:45 a.m.Denver Intl
10h 15m
1 stop
YUL9:00 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 431
Find similar

Delta flights from Region of Ontario to Colorado

Our best Delta deals on Region of Ontario to Colorado flight tickets
Delta
11 Oct
YYZ1:20 p.m.Toronto Pearson Intl
8h 55m
1 stop
DEN8:15 p.m.Denver Intl
13 Oct
DEN12:50 a.m.Denver Intl
7h 52m
1 stop
YYZ10:42 a.m.Toronto Pearson Intl
C$ 454
Find similar
Delta
30 Sep
YYZ1:20 p.m.Toronto Pearson Intl
9h 19m
1 stop
COS8:39 p.m.Colorado Springs
5 Nov
COS1:16 p.m.Colorado Springs
8h 42m
1 stop
YYZ11:58 p.m.Toronto Pearson Intl
C$ 468
Find similar
Delta
30 Sep
YYZ7:45 a.m.Toronto Pearson Intl
6h 21m
1 stop
COS12:06 p.m.Colorado Springs
4 Nov
COS8:09 a.m.Colorado Springs
12h 46m
2 stops
YYZ10:55 p.m.Toronto Pearson Intl
C$ 470
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Colorado 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 16 September 2025.
Use the filters below to find and compare flights from Ontario to Colorado that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 3/10

5:50 p.m.-11:15 p.m.

1 stop7h 25m

Denver Intl

Wed 22/10

6:00 a.m.-4:43 p.m.

1 stop8h 43m

C$ 347

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 2/10

5:25 p.m.-11:30 p.m.

1 stop8h 05m

Denver Intl

Wed 8/10

8:28 p.m.-2:04 p.m.

1 stop15h 36m

C$ 362

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$ 391

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Sun 12/10

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

1 stop19h 54m

Denver Intl

Wed 22/10

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

2 stops14h 41m

C$ 394

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$ 402

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

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Thu 30/10

5:25 p.m.-7:55 p.m.

Nonstop4h 30m

Denver Intl

Thu 6/11

11:15 a.m.-4:58 p.m.

Nonstop3h 43m

C$ 425

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

11:15 a.m.-4:58 p.m.

Nonstop3h 43m

C$ 430

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Sat 27/9

6:49 a.m.-10:08 p.m.

1 stop17h 19m

Colorado Springs

Fri 3/10

5:16 p.m.-12:30 p.m.

1 stop17h 14m

C$ 452

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 2/10

6:30 a.m.-6:33 p.m.

1 stop14h 03m

Denver Intl

Sun 5/10

7:16 a.m.-11:25 p.m.

1 stop14h 09m

C$ 452

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Colorado from

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

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 Colorado?

The cheapest month to fly to Colorado from Region of Ontario is in November. Flight prices, which tend to average around C$ 582, are often lower during this time because this is during the off-season. If you don’t want to visit Colorado in November, then you should wait until October to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 584.

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

The cheapest day to depart on your flight to Colorado is on a Friday when prices can be found for as low as C$ 712. This is often the case because there is less demand to fly during this day of the week. 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$ 1,030.

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

According to our data, the cheapest time of day to fly to Colorado is in the evening. momondo users have found flights departing from Region of Ontario to Colorado in the evening for as low as C$ 629. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the morning because they tend to be around C$ 806. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Colorado flight route?

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

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

You are more likely to see cheaper flights to Colorado from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around C$ 636 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from Region of Ontario for as low as C$ 555 on momondo.

What cabin class options are available on Ontario to Colorado flights?

There are 4 cabin classes available to choose from on Ontario to Colorado 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 Colorado flights?

You could potentially save up to 24% on your flight if you consider stops on a Region of Ontario to Colorado flight.

Cheap Region of Ontario to Colorado flight deals and tips

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

Best price found

C$ 405

Fastest flight time

3h 34m

Direct flights

Every day

Airports in Colorado

1 airport
The best one-way flight to Colorado from Region of Ontario in the past 72 hours is C$ 405. The best round-trip flight deal from Region of Ontario to Colorado found on momondo in the last 72 hours is C$ 576.
The fastest flight from Region of Ontario to Colorado takes 3h 34m
Direct flights go from Region of Ontario to Colorado every day.
There is 1 airport near Colorado: Denver Intl (DEN)
Search flight deals

  • When did momondo last update prices for flights from Ontario to Colorado?

    Prices for flights from Ontario to Colorado are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario to Colorado?

  • How old do you have to be to fly from Ontario to Colorado?

    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 Colorado.

  • What documentation or ID do you need to fly to Colorado?

    The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to Colorado?

Best airlines flying from Region of Ontario to Colorado

Compare and see reviews for airlines that fly from Region of Ontario to Colorado with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 259Free CancellationRating
7.2
3,093 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 304Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 339Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

Why use momondo?

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

Finding the right flight to Colorado from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Colorado quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Colorado 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 Colorado?

Once all potential Ontario to Colorado 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 Colorado right now. Can momondo alert me if prices change?

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

An easier way to manage your Colorado 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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