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Cheap flights from Ontario to Colorado from C$ 182

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 2/3. 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 Colorado

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:00 a.m. - 6:33 p.m.
YOW
-
COS
10h 33m2 stops
United Airlines Logo
11:42 a.m. - 9:35 p.m.
COS
-
YOW
7h 53m1 stop
C$ 428United Airlines
Tue, 14 Apr - Tue, 21 Apr
Multiple Airlines Logo
6:45 a.m. - 6:23 p.m.
YUL
-
DEN
13h 38m2 stops
Multiple Airlines Logo
7:24 p.m. - 12:30 a.m.
DEN
-
YUL
27h 06m1 stop
C$ 458Multiple Airlines
Thu, 19 Feb - Sun, 22 Feb
American Airlines Logo
1:14 p.m. - 11:16 p.m.
YYZ
-
DEN
12h 02m1 stop
American Airlines Logo
7:00 a.m. - 9:29 p.m.
DEN
-
YYZ
12h 29m1 stop
C$ 507American Airlines
Wed, 11 Feb - Sat, 14 Feb
Air Canada Logo
5:25 p.m. - 7:55 p.m.
YUL
-
DEN
4h 30mdirect
Air Canada Logo
8:05 a.m. - 7:25 p.m.
DEN
-
YUL
9h 20m1 stop
C$ 508Air Canada
Mon, 12 Jan - Sun, 18 Jan
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$ 514Air Canada
Sun, 1 Feb - Tue, 10 Feb
Alaska Airlines Logo
4:45 p.m. - 11:58 p.m.
YYZ
-
DEN
33h 13m2 stops
Alaska Airlines Logo
11:49 a.m. - 3:35 p.m.
DEN
-
YYZ
25h 46m2 stops
C$ 515Alaska Airlines
Thu, 5 Feb - Tue, 10 Feb
Alaska Airlines Logo
4:45 p.m. - 11:58 p.m.
YYZ
-
DEN
33h 13m2 stops
Alaska Airlines Logo
11:38 a.m. - 3:35 p.m.
DEN
-
YYZ
25h 57m2 stops
C$ 520Alaska Airlines
Tue, 3 Feb - Sat, 14 Feb
WestJet Logo
6:10 p.m. - 11:25 a.m.
YHM
-
DEN
19h 15m1 stop
WestJet Logo
7:40 p.m. - 5:10 p.m.
DEN
-
YHM
19h 30m1 stop
C$ 668WestJet
Mon, 1 Jun - Thu, 4 Jun
American Airlines Logo
6:29 p.m. - 10:09 a.m.
YYZ
-
EGE
17h 40m1 stop
American Airlines Logo
10:49 a.m. - 9:29 p.m.
EGE
-
YYZ
8h 40m1 stop
C$ 698American Airlines
Sat, 14 Feb - Thu, 19 Feb
WestJet Logo
6:10 p.m. - 11:25 a.m.
YHM
-
DEN
19h 15m1 stop
WestJet Logo
7:40 p.m. - 5:10 p.m.
DEN
-
YHM
19h 30m1 stop
C$ 874WestJet
Thu, 28 May - Sun, 31 May

Air Canada flights from Region of Ontario to Colorado

Our best Air Canada deals on Region of Ontario to Colorado flight tickets
Air Canada
12 Jan
YUL5:25 p.m.Montreal Pierre Elliott Trudeau Intl
4h 30m
DEN7:55 p.m.Denver Intl
18 Jan
DEN8:05 a.m.Denver Intl
9h 20m
1 stop
YUL7:25 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 508
Find similar
Air Canada
1 Feb
YUL5:25 p.m.Montreal Pierre Elliott Trudeau Intl
4h 30m
DEN7:55 p.m.Denver Intl
10 Feb
DEN11:15 a.m.Denver Intl
3h 43m
YUL4:58 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 514
Find similar
Air Canada
1 Feb
YUL9:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 44m
1 stop
DEN5:44 p.m.Denver Intl
10 Feb
DEN11:15 a.m.Denver Intl
3h 43m
YUL4:58 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 520
Find similar

American Airlines flights from Region of Ontario to Colorado

Our best American Airlines deals on Region of Ontario to Colorado flight tickets
American Airlines
11 Feb
YYZ1:14 p.m.Toronto Pearson Intl
12h 02m
1 stop
DEN11:16 p.m.Denver Intl
14 Feb
DEN7:00 a.m.Denver Intl
12h 29m
1 stop
YYZ9:29 p.m.Toronto Pearson Intl
C$ 507
Find similar
American Airlines
12 Jan
YYZ6:00 a.m.Toronto Pearson Intl
6h 48m
1 stop
DEN10:48 a.m.Denver Intl
18 Jan
DEN4:30 p.m.Denver Intl
16h 23m
1 stop
YYZ10:53 a.m.Toronto Pearson Intl
C$ 555
Find similar
American Airlines
18 Jan
YYZ6:14 a.m.Toronto Pearson Intl
12h 07m
1 stop
DEN4:21 p.m.Denver Intl
25 Jan
DEN7:50 a.m.Denver Intl
6h 29m
1 stop
YYZ4:19 p.m.Toronto Pearson Intl
C$ 596
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 23 December 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

OttawaColorado Springs

YOW - COS

YOWCOS

Ottawa

Tue 14/4

10:00 a.m.-6:33 p.m.

2 stops10h 33m

Colorado Springs

Tue 21/4

11:42 a.m.-9:35 p.m.

1 stop7h 53m

C$ 428

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Thu 19/2

6:45 a.m.-6:23 p.m.

2 stops13h 38m

Denver Intl

Sun 22/2

7:24 p.m.-12:30 a.m.

1 stop27h 06m

C$ 458

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Wed 11/2

1:14 p.m.-11:16 p.m.

1 stop12h 02m

Denver Intl

Sat 14/2

7:00 a.m.-9:29 p.m.

1 stop12h 29m

C$ 507

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Mon 12/1

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

Nonstop4h 30m

Denver Intl

Sun 18/1

8:05 a.m.-7:25 p.m.

1 stop9h 20m

C$ 508

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

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

Nonstop4h 30m

Denver Intl

Tue 10/2

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

Nonstop3h 43m

C$ 514

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 5/2

4:45 p.m.-11:58 p.m.

2 stops33h 13m

Denver Intl

Tue 10/2

11:49 a.m.-3:35 p.m.

2 stops25h 46m

C$ 515

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Tue 3/2

4:45 p.m.-11:58 p.m.

2 stops33h 13m

Denver Intl

Sat 14/2

11:38 a.m.-3:35 p.m.

2 stops25h 57m

C$ 520

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Mon 1/6

6:10 p.m.-11:25 a.m.

1 stop19h 15m

Denver Intl

Thu 4/6

7:40 p.m.-5:10 p.m.

1 stop19h 30m

C$ 668

TorontoVail

YYZ - EGE

YYZEGE

Toronto Pearson Intl

Sat 14/2

6:29 p.m.-10:09 a.m.

1 stop17h 40m

Vail Eagle County

Thu 19/2

10:49 a.m.-9:29 p.m.

1 stop8h 40m

C$ 698

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Thu 28/5

6:10 p.m.-11:25 a.m.

1 stop19h 15m

Denver Intl

Sun 31/5

7:40 p.m.-5:10 p.m.

1 stop19h 30m

C$ 874

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$ 542, 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 August to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 575.

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$ 714. 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$ 995.

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$ 627. 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 at noon 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$ 616 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$ 562 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 16% 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$ 370

Fastest flight time

3h 46m

Direct flights

Every day

Airports in Colorado

87 airports
The best one-way flight to Colorado from Region of Ontario in the past 72 hours is C$ 370. The best round-trip flight deal from Region of Ontario to Colorado found on momondo in the last 72 hours is C$ 616.
The fastest flight from Region of Ontario to Colorado takes 3h 46m
Direct flights go from Region of Ontario to Colorado every day.
There are 87 airports in Colorado. 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 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$ 258Free CancellationRating
7.2
3,214 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 303Free CancellationRating
7.4
9,106 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 368Free CancellationRating
7.1
10,551 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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