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Cheap flights from Colorado to Ontario 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 Colorado to Ontario 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 Colorado to Ontario

Cheap round-trip flights

Multiple Airlines Logo
6:00 a.m. - 9:50 p.m.DEN-YYZ
13h 50m1 stop
Multiple Airlines Logo
12:00 p.m. - 3:59 a.m.YYZ-DEN
17h 59m2 stops
C$ 394Multiple Airlines
Find Deal
Thu, 16 Oct - Wed, 22 Oct
Multiple Airlines Logo
6:00 a.m. - 9:50 p.m.DEN-YYZ
13h 50m1 stop
Multiple Airlines Logo
9:45 a.m. - 3:59 a.m.YYZ-DEN
20h 14m1 stop
C$ 399Multiple Airlines
Find Deal
Thu, 16 Oct - Wed, 22 Oct
Multiple Airlines Logo
6:02 p.m. - 2:20 p.m.DEN-YYZ
18h 18m1 stop
Multiple Airlines Logo
7:15 a.m. - 5:07 p.m.YYZ-DEN
11h 52m1 stop
C$ 411Multiple Airlines
Find Deal
Fri, 5 Dec - Tue, 9 Dec
United Airlines Logo
7:48 a.m. - 5:06 p.m.DEN-YOW
7h 18m1 stop
United Airlines Logo
5:15 a.m. - 11:58 a.m.YOW-DEN
8h 43m1 stop
C$ 450United Airlines
Find Deal
Wed, 22 Oct - Sat, 25 Oct
United Airlines Logo
7:48 a.m. - 9:35 p.m.DEN-YOW
11h 47m1 stop
United Airlines Logo
5:25 p.m. - 10:00 p.m.YOW-DEN
6h 35m1 stop
C$ 455United Airlines
Find Deal
Sat, 4 Oct - Sat, 11 Oct
Lufthansa Logo
5:45 p.m. - 9:11 a.m.DEN-YOW
13h 26m1 stop
Lufthansa Logo
5:25 p.m. - 6:42 a.m.YOW-DEN
15h 17m1 stop
C$ 486Lufthansa
Find Deal
Sat, 4 Oct - Sat, 11 Oct
Air Canada Logo
11:15 a.m. - 5:00 p.m.DEN-YUL
3h 45mdirect
Air Canada Logo
5:25 p.m. - 7:55 p.m.YUL-DEN
4h 30mdirect
C$ 613Air Canada
Find Deal
Sun, 19 Oct - Mon, 27 Oct
Air Canada Logo
1:25 p.m. - 9:40 p.m.DEN-YUL
6h 15m1 stop
Air Canada Logo
5:25 p.m. - 7:55 p.m.YUL-DEN
4h 30mdirect
C$ 621Air Canada
Find Deal
Sun, 19 Oct - Mon, 27 Oct
American Airlines Logo
2:04 p.m. - 11:40 a.m.DEN-YUL
19h 36m1 stop
American Airlines Logo
5:24 p.m. - 8:39 a.m.YUL-DEN
17h 15m1 stop
C$ 646American Airlines
Find Deal
Mon, 20 Oct - Mon, 27 Oct
American Airlines Logo
5:45 a.m. - 2:49 p.m.DEN-YUL
7h 04m1 stop
American Airlines Logo
5:24 p.m. - 8:39 a.m.YUL-DEN
17h 15m1 stop
C$ 654American Airlines
Find Deal
Sun, 19 Oct - Mon, 27 Oct

Delta flights from Colorado to Region of Ontario

Our best Delta deals on Colorado to Region of Ontario flight tickets
Delta
11 Oct
COS8:09 a.m.Colorado Springs
6h 31m
1 stop
YYZ4:40 p.m.Toronto Pearson Intl
14 Oct
YYZ11:52 a.m.Toronto Pearson Intl
10h 38m
1 stop
COS8:30 p.m.Colorado Springs
C$ 680
Find similar
Delta
17 Oct
DEN12:55 a.m.Denver Intl
9h 07m
1 stop
YUL12:02 p.m.Montreal Pierre Elliott Trudeau Intl
22 Oct
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
6h 11m
1 stop
DEN10:11 a.m.Denver Intl
C$ 685
Find similar
Delta
11 Oct
COS8:09 a.m.Colorado Springs
13h 09m
2 stops
YYZ11:18 p.m.Toronto Pearson Intl
14 Oct
YYZ11:52 a.m.Toronto Pearson Intl
10h 38m
1 stop
COS8:30 p.m.Colorado Springs
C$ 693
Find similar

United Airlines flights from Colorado to Region of Ontario

Our best United Airlines deals on Colorado to Region of Ontario flight tickets
United Airlines
22 Oct
DEN7:48 a.m.Denver Intl
7h 18m
1 stop
YOW5:06 p.m.Ottawa
25 Oct
YOW5:15 a.m.Ottawa
8h 43m
1 stop
DEN11:58 a.m.Denver Intl
C$ 450
Find similar
United Airlines
4 Oct
DEN7:48 a.m.Denver Intl
11h 47m
1 stop
YOW9:35 p.m.Ottawa
11 Oct
YOW5:25 p.m.Ottawa
6h 35m
1 stop
DEN10:00 p.m.Denver Intl
C$ 455
Find similar
United Airlines
7 Oct
DEN5:55 p.m.Denver Intl
14h 03m
1 stop
YOW9:58 a.m.Ottawa
14 Oct
YOW5:50 p.m.Ottawa
7h 25m
1 stop
DEN11:15 p.m.Denver Intl
C$ 456
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Colorado to Region of Ontario 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 22 September 2025.
Use the filters below to find and compare flights from Colorado to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Thu 16/10

6:00 a.m.-9:50 p.m.

1 stop13h 50m

Toronto Pearson Intl

Wed 22/10

12:00 p.m.-3:59 a.m.

2 stops17h 59m

C$ 394

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Thu 16/10

6:00 a.m.-9:50 p.m.

1 stop13h 50m

Toronto Pearson Intl

Wed 22/10

9:45 a.m.-3:59 a.m.

1 stop20h 14m

C$ 399

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Fri 5/12

6:02 p.m.-2:20 p.m.

1 stop18h 18m

Toronto Pearson Intl

Tue 9/12

7:15 a.m.-5:07 p.m.

1 stop11h 52m

C$ 410

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 22/10

7:48 a.m.-5:06 p.m.

1 stop7h 18m

Ottawa

Sat 25/10

5:15 a.m.-11:58 a.m.

1 stop8h 43m

C$ 450

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 4/10

7:48 a.m.-9:35 p.m.

1 stop11h 47m

Ottawa

Sat 11/10

5:25 p.m.-10:00 p.m.

1 stop6h 35m

C$ 455

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 4/10

5:45 p.m.-9:11 a.m.

1 stop13h 26m

Ottawa

Sat 11/10

5:25 p.m.-6:42 a.m.

1 stop15h 17m

C$ 486

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Sun 19/10

11:15 a.m.-5:00 p.m.

Nonstop3h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 27/10

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

Nonstop4h 30m

C$ 613

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Sun 19/10

1:25 p.m.-9:40 p.m.

1 stop6h 15m

Montreal Pierre Elliott Trudeau Intl

Mon 27/10

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

Nonstop4h 30m

C$ 621

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Mon 20/10

2:04 p.m.-11:40 a.m.

1 stop19h 36m

Montreal Pierre Elliott Trudeau Intl

Mon 27/10

5:24 p.m.-8:39 a.m.

1 stop17h 15m

C$ 646

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Sun 19/10

5:45 a.m.-2:49 p.m.

1 stop7h 04m

Montreal Pierre Elliott Trudeau Intl

Mon 27/10

5:24 p.m.-8:39 a.m.

1 stop17h 15m

C$ 654

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 Ontario from

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

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 Region of Ontario?

In general, March is the cheapest month to fly from Colorado to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 349. If you are unable to visit Region of Ontario during the month of March, then departing from Colorado during the month January is also very affordable. Most momondo users find prices during this month for around C$ 437.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from Colorado to Region of Ontario is on a Thursday. Travellers who choose to depart for Region of Ontario on a Thursday will often find tickets for as low as C$ 495. The most expensive day to fly to Region of Ontario is Sunday, with ticket prices averaging around C$ 835.

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

Our most recent data shows that the best time of day to fly to Region of Ontario is in the afternoon. Flights from Colorado to Region of Ontario during this time can be as low as C$ 524. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 550 on average. Flights to Region of Ontario from Colorado in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Colorado to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

You are more likely to see cheaper flights to Region of Ontario from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around C$ 661 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Colorado for as low as C$ 449 on momondo.

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

There are 3 cabin classes available to choose from on Colorado to Ontario 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 Colorado to Region of Ontario flights?

You could potentially save up to 57% on your flight if you consider stops on a Colorado to Region of Ontario flight.

Cheap Colorado to Region of Ontario flight deals and tips

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

Best price found

C$ 296

Fastest flight time

3h 05m

Direct flights

Every day

Airports in Region of Ontario

2 airports
The best one-way flight to Region of Ontario from Colorado in the past 72 hours is C$ 296. The best round-trip flight deal from Colorado to Region of Ontario found on momondo in the last 72 hours is C$ 276.
The fastest flight from Colorado to Region of Ontario takes 3h 05m
Direct flights go from Colorado to Region of Ontario every day.
There are 2 airports near Region of Ontario: Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ)
Search flight deals

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

    Prices for flights from Colorado to Ontario were last updated today.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to Ontario.

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

    The travel and health documents required for your trip to Ontario can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Colorado to Region of Ontario

Compare and see reviews for airlines that fly from Colorado to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 215Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

Why use momondo?

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

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 Colorado to Ontario for you.

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

All flight searches from Colorado to Ontario on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Colorado to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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

An easier way to manage your Region of Ontario 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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Find better results for your trip to Ontario

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