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Cheap flights from Colorado to Ontario from C$ 185

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 20/5. 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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Find the cheapest flights from Colorado to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 a.m. - 10:05 p.m.
COS
-
YOW
14h 05m
2 stops
United Airlines Logo
6:25 a.m. - 10:47 a.m.
YOW
-
COS
6h 22m
1 stop
C$ 488United Airlines
Wed, 29 Apr - Sat, 2 May
United Airlines Logo
6:00 a.m. - 10:05 p.m.
COS
-
YOW
14h 05m
2 stops
United Airlines Logo
10:44 a.m. - 6:22 p.m.
YOW
-
COS
9h 38m
2 stops
C$ 495United Airlines
Wed, 29 Apr - Sat, 2 May
American Airlines Logo
5:44 p.m. - 11:44 a.m.
DEN
-
YUL
16h 00m
1 stop
American Airlines Logo
12:30 p.m. - 11:59 p.m.
YUL
-
DEN
13h 29m
1 stop
C$ 536American Airlines
Tue, 21 Apr - Tue, 28 Apr
American Airlines Logo
7:36 a.m. - 9:37 p.m.
DEN
-
YUL
12h 01m
2 stops
American Airlines Logo
12:30 p.m. - 11:59 p.m.
YUL
-
DEN
13h 29m
1 stop
C$ 550American Airlines
Tue, 21 Apr - Tue, 28 Apr
Multiple Airlines Logo
4:36 p.m. - 1:10 p.m.
DEN
-
YTZ
18h 34m
1 stop
Multiple Airlines Logo
9:15 a.m. - 4:04 p.m.
YTZ
-
DEN
8h 49m
1 stop
C$ 550Multiple Airlines
Tue, 28 Apr - Fri, 1 May
Multiple Airlines Logo
7:15 a.m. - 3:45 p.m.
DEN
-
YYZ
30h 30m
1 stop
Multiple Airlines Logo
4:55 p.m. - 10:59 p.m.
YYZ
-
DEN
32h 04m
1 stop
C$ 550Multiple Airlines
Tue, 28 Apr - Sat, 2 May
Delta Logo
8:15 a.m. - 10:59 p.m.
COS
-
YYZ
12h 44m
2 stops
Delta Logo
10:00 a.m. - 9:32 p.m.
YYZ
-
COS
13h 32m
2 stops
C$ 614Delta
Thu, 7 May - Thu, 14 May
Delta Logo
11:10 a.m. - 11:14 p.m.
COS
-
YYZ
10h 04m
1 stop
Delta Logo
12:25 p.m. - 10:47 p.m.
YYZ
-
COS
12h 22m
2 stops
C$ 622Delta
Mon, 15 Jun - Fri, 19 Jun
Air Canada Logo
1:25 p.m. - 12:46 a.m.
COS
-
YOW
9h 21m
2 stops
Air Canada Logo
5:25 p.m. - 11:59 p.m.
YOW
-
COS
8h 34m
2 stops
C$ 626Air Canada
Wed, 6 May - Wed, 13 May
Air Canada Logo
9:40 a.m. - 9:40 p.m.
DEN
-
YXU
10h 00m
2 stops
Air Canada Logo
5:40 a.m. - 10:35 a.m.
YXU
-
DEN
6h 55m
1 stop
C$ 1,033Air Canada
Fri, 31 Jul - Sun, 9 Aug

American Airlines flights from Colorado to Region of Ontario

Our best American Airlines deals on Colorado to Region of Ontario flight tickets
American Airlines
21 Apr
DEN5:44 p.m.Denver Intl
16h 00m
1 stop
YUL11:44 a.m.Montreal Pierre Elliott Trudeau Intl
28 Apr
YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl
13h 29m
1 stop
DEN11:59 p.m.Denver Intl
C$ 536
American Airlines
21 Apr
DEN7:36 a.m.Denver Intl
12h 01m
2 stops
YUL9:37 p.m.Montreal Pierre Elliott Trudeau Intl
28 Apr
YUL12:30 p.m.Montreal Pierre Elliott Trudeau Intl
13h 29m
1 stop
DEN11:59 p.m.Denver Intl
C$ 550
American Airlines
21 Apr
DEN6:19 a.m.Denver Intl
13h 18m
2 stops
YUL9:37 p.m.Montreal Pierre Elliott Trudeau Intl
28 Apr
YUL1:03 p.m.Montreal Pierre Elliott Trudeau Intl
12h 56m
2 stops
DEN11:59 p.m.Denver Intl
C$ 557

Delta flights from Colorado to Region of Ontario

Our best Delta deals on Colorado to Region of Ontario flight tickets
Delta
7 May
COS8:15 a.m.Colorado Springs
12h 44m
2 stops
YYZ10:59 p.m.Toronto Pearson Intl
14 May
YYZ10:00 a.m.Toronto Pearson Intl
13h 32m
2 stops
COS9:32 p.m.Colorado Springs
C$ 614
Delta
15 Jun
COS11:10 a.m.Colorado Springs
10h 04m
1 stop
YYZ11:14 p.m.Toronto Pearson Intl
19 Jun
YYZ12:25 p.m.Toronto Pearson Intl
12h 22m
2 stops
COS10:47 p.m.Colorado Springs
C$ 622
Delta
20 Apr
DEN7:12 a.m.Denver Intl
14h 31m
1 stop
YYZ11:43 p.m.Toronto Pearson Intl
23 Apr
YYZ7:55 a.m.Toronto Pearson Intl
15h 10m
1 stop
DEN9:05 p.m.Denver Intl
C$ 636

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 26 March 2026.
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

Cheapest round-trip

Colorado SpringsOttawa

COS - YOW

COSYOW

Colorado Springs

Wed 29/4

6:00 a.m.-10:05 p.m.

2 stops14h 05m

Ottawa

Sat 2/5

6:25 a.m.-10:47 a.m.

1 stop6h 22m

C$ 488

Colorado SpringsOttawa

COS - YOW

COSYOW

Colorado Springs

Wed 29/4

6:00 a.m.-10:05 p.m.

2 stops14h 05m

Ottawa

Sat 2/5

10:44 a.m.-6:22 p.m.

2 stops9h 38m

C$ 495

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Tue 21/4

5:44 p.m.-11:44 a.m.

1 stop16h 00m

Montreal Pierre Elliott Trudeau Intl

Tue 28/4

12:30 p.m.-11:59 p.m.

1 stop13h 29m

C$ 536

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Tue 21/4

7:36 a.m.-9:37 p.m.

2 stops12h 01m

Montreal Pierre Elliott Trudeau Intl

Tue 28/4

12:30 p.m.-11:59 p.m.

1 stop13h 29m

C$ 550

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Tue 28/4

4:36 p.m.-1:10 p.m.

1 stop18h 34m

Toronto Island

Fri 1/5

9:15 a.m.-4:04 p.m.

1 stop8h 49m

C$ 550

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 28/4

7:15 a.m.-3:45 p.m.

1 stop30h 30m

Toronto Pearson Intl

Sat 2/5

4:55 p.m.-10:59 p.m.

1 stop32h 04m

C$ 550

Colorado SpringsToronto

COS - YYZ

COSYYZ

Colorado Springs

Thu 7/5

8:15 a.m.-10:59 p.m.

2 stops12h 44m

Toronto Pearson Intl

Thu 14/5

10:00 a.m.-9:32 p.m.

2 stops13h 32m

C$ 614

Colorado SpringsToronto

COS - YYZ

COSYYZ

Colorado Springs

Mon 15/6

11:10 a.m.-11:14 p.m.

1 stop10h 04m

Toronto Pearson Intl

Fri 19/6

12:25 p.m.-10:47 p.m.

2 stops12h 22m

C$ 622

Colorado SpringsOttawa

COS - YOW

COSYOW

Colorado Springs

Wed 6/5

1:25 p.m.-12:46 a.m.

2 stops9h 21m

Ottawa

Wed 13/5

5:25 p.m.-11:59 p.m.

2 stops8h 34m

C$ 626
Quickest round-trip

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 31/7

9:40 a.m.-9:40 p.m.

2 stops10h 00m

London

Sun 9/8

5:40 a.m.-10:35 a.m.

1 stop6h 55m

C$ 1,033

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, September 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$ 632. If you are unable to visit Region of Ontario during the month of September, then departing from Colorado during the month October is also very affordable. Most momondo users find prices during this month for around C$ 676.

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$ 844.

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 morning. Flights from Colorado to Region of Ontario during this time can be as low as C$ 549. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 875 on average. Flights to Region of Ontario from Colorado at noon 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$ 754 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$ 552 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$ 411

Fastest flight time

3h 10m

Direct flights

Every day

Airports in Region of Ontario

123 airports
The best one-way flight to Region of Ontario from Colorado in the past 72 hours is C$ 411. The best round-trip flight deal from Colorado to Region of Ontario found on momondo in the last 72 hours is C$ 246.
The fastest flight from Colorado to Region of Ontario takes 3h 10m
Direct flights go from Colorado to Region of Ontario every day.
There are 123 airports in Region of Ontario. From Colorado there are direct flights to 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$ 286Free CancellationRating
7.1
10,842 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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Popular flights according to clicks in the last 7 days on momondo
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