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Cheap flights from Denver to Ontario from $111

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Ontario departing on 12/17. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:44 am - 12:30 amDEN-YUL
12h 46m1 stop
Multiple Airlines Logo
6:45 am - 10:57 pmYUL-DEN
18h 12m2 stops
$270Multiple Airlines
Find Deal
Fri, Jan 16 - Mon, Jan 19
Multiple Airlines Logo
4:25 pm - 1:00 pmDEN-YUL
18h 35m2 stops
Multiple Airlines Logo
4:35 pm - 5:22 pmYUL-DEN
26h 47m1 stop
$329Multiple Airlines
Find Deal
Sat, Dec 13 - Wed, Jan 7
American Airlines Logo
7:20 am - 9:23 pmDEN-YYZ
12h 03m1 stop
American Airlines Logo
11:30 am - 11:16 pmYYZ-DEN
13h 46m1 stop
$336American Airlines
Find Deal
Tue, Jan 13 - Wed, Jan 14
American Airlines Logo
3:14 pm - 3:08 pmDEN-YUL
21h 54m1 stop
American Airlines Logo
3:52 pm - 10:49 amYUL-DEN
20h 57m1 stop
$338American Airlines
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Tue, Jan 20 - Tue, Jan 27
United Airlines Logo
4:03 pm - 8:46 amDEN-YXU
14h 43m2 stops
United Airlines Logo
5:10 am - 4:36 pmYXU-DEN
13h 26m2 stops
$797United Airlines
Find Deal
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
1:45 pm - 8:46 amDEN-YXU
17h 01m2 stops
United Airlines Logo
5:10 am - 4:36 pmYXU-DEN
13h 26m2 stops
$798United Airlines
Find Deal
Thu, Feb 19 - Mon, Feb 23
Air Canada Logo
11:42 am - 8:46 amDEN-YXU
19h 04m2 stops
Air Canada Logo
5:40 pm - 8:55 amYXU-DEN
17h 15m2 stops
$802Air Canada
Find Deal
Thu, Feb 19 - Mon, Feb 23
Air Canada Logo
1:25 pm - 9:21 pmDEN-YXU
5h 56m1 stop
Air Canada Logo
5:40 pm - 8:55 amYXU-DEN
17h 15m2 stops
$825Air Canada
Find Deal
Thu, Feb 19 - Mon, Feb 23
WestJet Logo
6:24 am - 1:21 pmDEN-YHM
28h 57m2 stops
WestJet Logo
6:10 pm - 3:04 pmYHM-DEN
22h 54m2 stops
$920WestJet
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Thu, Feb 26 - Sun, Mar 1
WestJet Logo
6:24 am - 5:16 pmDEN-YHM
32h 52m2 stops
WestJet Logo
6:10 pm - 8:07 pmYHM-DEN
27h 57m2 stops
$949WestJet
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Sun, Mar 1 - Wed, Mar 4

United Airlines flights from Denver to Region of Ontario

Our best United Airlines deals on Denver to Region of Ontario flight tickets
United Airlines
Feb 14
DEN5:54 pmDenver Intl
14h 26m
1 stop
YUL10:20 amMontreal Pierre Elliott Trudeau Intl
Feb 17
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
11h 57m
1 stop
DEN3:57 pmDenver Intl
$454
Find similar
United Airlines
Jan 14
DEN7:50 amDenver Intl
8h 50m
1 stop
YUL6:40 pmMontreal Pierre Elliott Trudeau Intl
Jan 18
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
18h 00m
1 stop
DEN10:00 pmDenver Intl
$455
Find similar
United Airlines
Mar 11
DEN7:23 pmDenver Intl
18h 34m
1 stop
YUL3:57 pmMontreal Pierre Elliott Trudeau Intl
Mar 17
YUL1:10 pmMontreal Pierre Elliott Trudeau Intl
10h 27m
1 stop
DEN9:37 pmDenver Intl
$456
Find similar

American Airlines flights from Denver to Region of Ontario

Our best American Airlines deals on Denver to Region of Ontario flight tickets
American Airlines
Jan 13
DEN7:20 amDenver Intl
12h 03m
1 stop
YYZ9:23 pmToronto Pearson Intl
Jan 14
YYZ11:30 amToronto Pearson Intl
13h 46m
1 stop
DEN11:16 pmDenver Intl
$336
Find similar
American Airlines
Jan 20
DEN3:14 pmDenver Intl
21h 54m
1 stop
YUL3:08 pmMontreal Pierre Elliott Trudeau Intl
Jan 27
YUL3:52 pmMontreal Pierre Elliott Trudeau Intl
20h 57m
1 stop
DEN10:49 amDenver Intl
$338
Find similar
American Airlines
Jan 28
DEN3:00 pmDenver Intl
22h 08m
1 stop
YUL3:08 pmMontreal Pierre Elliott Trudeau Intl
Feb 2
YUL3:52 pmMontreal Pierre Elliott Trudeau Intl
20h 57m
1 stop
DEN10:49 amDenver Intl
$339
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Denver 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 832,500 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from Denver to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 1/16

9:44 am-12:30 am

1 stop12h 46m

Montreal Pierre Elliott Trudeau Intl

Mon 1/19

6:45 am-10:57 pm

2 stops18h 12m

$270

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Sat 12/13

4:25 pm-1:00 pm

2 stops18h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 1/7

4:35 pm-5:22 pm

1 stop26h 47m

$329

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 1/13

7:20 am-9:23 pm

1 stop12h 03m

Toronto Pearson Intl

Wed 1/14

11:30 am-11:16 pm

1 stop13h 46m

$336

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Tue 1/20

3:14 pm-3:08 pm

1 stop21h 54m

Montreal Pierre Elliott Trudeau Intl

Tue 1/27

3:52 pm-10:49 am

1 stop20h 57m

$338

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 2/19

4:03 pm-8:46 am

2 stops14h 43m

London

Mon 2/23

5:10 am-4:36 pm

2 stops13h 26m

$797

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 2/19

1:45 pm-8:46 am

2 stops17h 01m

London

Mon 2/23

5:10 am-4:36 pm

2 stops13h 26m

$798

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 2/19

11:42 am-8:46 am

2 stops19h 04m

London

Mon 2/23

5:40 pm-8:55 am

2 stops17h 15m

$802

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 2/19

1:25 pm-9:21 pm

1 stop5h 56m

London

Mon 2/23

5:40 pm-8:55 am

2 stops17h 15m

$825

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Thu 2/26

6:24 am-1:21 pm

2 stops28h 57m

Hamilton

Sun 3/1

6:10 pm-3:04 pm

2 stops22h 54m

$920

DenverHamilton

DEN - YHM

DENYHM

Denver Intl

Sun 3/1

6:24 am-5:16 pm

2 stops32h 52m

Hamilton

Wed 3/4

6:10 pm-8:07 pm

2 stops27h 57m

$949

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 Denver 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?

The month of March is, on average, the cheapest month to fly to Region of Ontario from Denver, with most prices found around $253. If you aren’t able to travel during the month of March, then book flights to Region of Ontario from Denver during January instead. Flights to Region of Ontario in January, while not as cheap as those in March, still average around $317.

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

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Denver. The lowest ticket price found for a Thursday departure recently was $665. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Denver to Region of Ontario on a Sunday will generally be more expensive and average around $811. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Region of Ontario is in the evening. momondo users have found flights departing from Denver to Region of Ontario in the evening for as low as $588. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $735.

What is the cheapest Denver Intl to Ontario flight route?

Fly from Denver Intl to Toronto Pearson Intl for the best Denver Intl - 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 Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $502 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 Denver for as low as $326 on momondo.

What cabin class options are available on Denver Intl to Ontario flights?

There are 4 cabin classes available to choose from on Denver Intl 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 Denver to Region of Ontario flights?

You could potentially save up to 7% on your flight if you consider stops on a Denver to Region of Ontario flight.

Cheap Denver to Region of Ontario flight deals and tips

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

Best Price Found

$263

Fastest flight time

3h 09m

Direct flights

Every day

Airports in Region of Ontario

2 airports
The best one-way flight to Region of Ontario from Denver in the past 72 hours is $263. The best round-trip flight deal from Denver to Region of Ontario found on momondo in the last 72 hours is $554.
The fastest flight from Denver to Region of Ontario takes 3h 09m
Direct flights go from Denver 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 Denver Intl Airport to Ontario?

    Prices for flights from Denver Intl Airport to Ontario are refreshed on a daily basis.

  • How many operators does momondo search for flights from Denver Intl Airport to Ontario?

  • How old do you have to be to fly from Denver Intl Airport to Ontario?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Denver Intl Airport to Ontario.

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

    The necessary travel and health documents for your Ontario trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Denver to Region of Ontario

Compare and see reviews for airlines that fly from Denver to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $143Free CancellationRating
7.2
3,161 reviews
Search WestJet flights
Air CanadaPriceFrom $221Free CancellationRating
7.1
10,448 reviews
Search Air Canada flights
United AirlinesPriceFrom $289Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Denver 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 Denver to Ontario for you.

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

Yes. All flights to Ontario from Denver on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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

Yes momondo offers price alerts on flights to Ontario from Denver. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Region of Ontario trip

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Find better results for your trip to Ontario

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