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Cheap flights from Ontario to Colorado from $137

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 3/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:10 pm - 11:20 am
YHM
-
DEN
19h 10m
1 stop
WestJet Logo
12:15 pm - 5:15 pm
DEN
-
YHM
27h 00m
1 stop
$319WestJet
Sat, May 2 - Sun, May 10
WestJet Logo
6:10 pm - 11:20 am
YHM
-
DEN
19h 10m
1 stop
WestJet Logo
12:15 pm - 5:15 pm
DEN
-
YHM
27h 00m
1 stop
$323WestJet
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
10:00 am - 9:38 pm
YYZ
-
DEN
13h 38m
2 stops
Multiple Airlines Logo
12:15 pm - 12:10 am
DEN
-
YYZ
9h 55m
1 stop
$376Multiple Airlines
Tue, May 12 - Wed, May 20
Multiple Airlines Logo
9:30 am - 3:49 pm
YYZ
-
DEN
8h 19m
1 stop
Multiple Airlines Logo
9:25 am - 11:59 pm
DEN
-
YYZ
12h 34m
1 stop
$377Multiple Airlines
Wed, May 6 - Mon, May 11
Air Canada Logo
8:30 am - 10:23 am
YYZ
-
DEN
3h 53mnonstop
Air Canada Logo
7:05 pm - 6:48 am
DEN
-
YYZ
9h 43m
1 stop
$378Air Canada
Sat, Feb 28 - Wed, Apr 15
Air Canada Logo
5:35 pm - 7:55 pm
YUL
-
DEN
4h 20mnonstop
Air Canada Logo
11:10 am - 4:58 pm
DEN
-
YUL
3h 48mnonstop
$385Air Canada
Fri, Apr 10 - Mon, Apr 13
United Airlines Logo
6:10 am - 4:34 pm
YYZ
-
COS
12h 24m
2 stops
United Airlines Logo
1:33 pm - 11:54 pm
COS
-
YYZ
8h 21m
2 stops
$399United Airlines
Wed, Mar 25 - Wed, Apr 1
United Airlines Logo
4:10 pm - 9:04 pm
YYZ
-
COS
6h 54m
1 stop
United Airlines Logo
11:40 am - 9:32 pm
COS
-
YYZ
7h 52m
1 stop
$401United Airlines
Wed, Mar 25 - Wed, Apr 1
American Airlines Logo
1:55 pm - 11:59 pm
YYZ
-
COS
12h 04m
2 stops
American Airlines Logo
6:00 am - 4:19 pm
COS
-
YYZ
8h 19m
1 stop
$411American Airlines
Wed, Mar 25 - Sat, Mar 28
American Airlines Logo
7:29 am - 6:26 pm
YUL
-
DEN
12h 57m
1 stop
American Airlines Logo
5:44 pm - 11:44 am
DEN
-
YUL
16h 00m
1 stop
$419American Airlines
Fri, Apr 10 - Mon, Apr 13

American Airlines flights from Region of Ontario to Colorado

Our best American Airlines deals on Region of Ontario to Colorado flight tickets
American Airlines
Mar 7
YYZ1:10 pmToronto Pearson Intl
11h 27m
1 stop
DEN10:37 pmDenver Intl
Mar 14
DEN6:00 amDenver Intl
8h 19m
1 stop
YYZ4:19 pmToronto Pearson Intl
$400
American Airlines
Mar 7
YYZ1:10 pmToronto Pearson Intl
11h 27m
1 stop
DEN10:37 pmDenver Intl
Mar 14
DEN5:00 amDenver Intl
9h 19m
1 stop
YYZ4:19 pmToronto Pearson Intl
$407
American Airlines
Mar 25
YYZ1:55 pmToronto Pearson Intl
12h 04m
2 stops
COS11:59 pmColorado Springs
Mar 28
COS6:00 amColorado Springs
8h 19m
1 stop
YYZ4:19 pmToronto Pearson Intl
$411

Delta flights from Region of Ontario to Colorado

Our best Delta deals on Region of Ontario to Colorado flight tickets
Delta
Mar 25
YYZ6:00 amToronto Pearson Intl
15h 36m
1 stop
DEN7:36 pmDenver Intl
Mar 29
DEN12:35 amDenver Intl
6h 30m
1 stop
YYZ9:05 amToronto Pearson Intl
$408
Delta
Mar 9
YUL7:30 pmMontreal Pierre Elliott Trudeau Intl
16h 36m
1 stop
DEN10:06 amDenver Intl
Mar 12
DEN12:35 amDenver Intl
9h 24m
1 stop
YUL11:59 amMontreal Pierre Elliott Trudeau Intl
$423
Delta
Mar 20
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
8h 34m
1 stop
DEN1:34 pmDenver Intl
Mar 24
DEN11:38 amDenver Intl
18h 52m
1 stop
YUL8:30 amMontreal Pierre Elliott Trudeau Intl
$424

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 832,500 searches. Data last updated February 8, 2026.
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

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Sat 5/2

6:10 pm-11:20 am

1 stop19h 10m

Denver Intl

Sun 5/10

12:15 pm-5:15 pm

1 stop27h 00m

$319

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Sun 5/3

6:10 pm-11:20 am

1 stop19h 10m

Denver Intl

Sun 5/10

12:15 pm-5:15 pm

1 stop27h 00m

$323

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Tue 5/12

10:00 am-9:38 pm

2 stops13h 38m

Denver Intl

Wed 5/20

12:15 pm-12:10 am

1 stop9h 55m

$376

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Wed 5/6

9:30 am-3:49 pm

1 stop8h 19m

Denver Intl

Mon 5/11

9:25 am-11:59 pm

1 stop12h 34m

$377

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sat 2/28

8:30 am-10:23 am

Nonstop3h 53m

Denver Intl

Wed 4/15

7:05 pm-6:48 am

1 stop9h 43m

$378

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Fri 4/10

5:35 pm-7:55 pm

Nonstop4h 20m

Denver Intl

Mon 4/13

11:10 am-4:58 pm

Nonstop3h 48m

$385

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Wed 3/25

6:10 am-4:34 pm

2 stops12h 24m

Colorado Springs

Wed 4/1

1:33 pm-11:54 pm

2 stops8h 21m

$399

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Wed 3/25

4:10 pm-9:04 pm

1 stop6h 54m

Colorado Springs

Wed 4/1

11:40 am-9:32 pm

1 stop7h 52m

$401

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Wed 3/25

1:55 pm-11:59 pm

2 stops12h 04m

Colorado Springs

Sat 3/28

6:00 am-4:19 pm

1 stop8h 19m

$411

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Fri 4/10

7:29 am-6:26 pm

1 stop12h 57m

Denver Intl

Mon 4/13

5:44 pm-11:44 am

1 stop16h 00m

$419

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 month of November is, on average, the cheapest month to fly to Colorado from Region of Ontario, with most prices found around $394. The month of August is another great option to travel to Colorado, with average flight prices from Region of Ontario averaging around $414.

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

The cheapest day to depart from Region of Ontario to Colorado is on a Friday when prices can be found for as low as $431. On the other hand, Sunday is the most expensive day to depart from Region of Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $601.

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

The cheapest time of day to fly to Colorado is at noon when flights can be purchased for as low as $490. In the afternoon is when there is more demand to fly to Colorado, so prices are often more expensive at around $515 per ticket.

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 $460 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 $353 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 15% 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

$267

Fastest flight time

3h 42m

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 $267. The best round-trip flight deal from Region of Ontario to Colorado found on momondo in the last 72 hours is $446.
The fastest flight from Region of Ontario to Colorado takes 3h 42m
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 were last updated today.

  • 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 required travel and health documents for your Colorado 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 Colorado. 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 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
United AirlinesPriceFrom $218Free CancellationRating
7.4
9,254 reviews
Search United Airlines flights
Air CanadaPriceFrom $267Free CancellationRating
7.1
10,697 reviews
Search Air Canada flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Colorado. momondo saves you time and could save you money on your trip.

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

Flights from Ontario to Colorado with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

Yes. momondo can track prices for Ontario to Colorado flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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