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Cheap flights from Denver to Ontario from $85

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 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.
Multiple Airlines Logo
7:30 am - 11:20 pm
DEN
-
YYZ
13h 50m2 stops
Multiple Airlines Logo
10:15 am - 8:00 pm
YYZ
-
DEN
11h 45m1 stop
$224Multiple Airlines
Wed, Jan 28 - Mon, Feb 9
Multiple Airlines Logo
7:30 am - 11:20 pm
DEN
-
YYZ
13h 50m2 stops
Multiple Airlines Logo
8:00 pm - 9:01 am
YYZ
-
DEN
15h 01m1 stop
$227Multiple Airlines
Wed, Jan 28 - Sun, Feb 1
Multiple Airlines Logo
4:26 pm - 6:47 am
DEN
-
YYZ
12h 21m1 stop
Multiple Airlines Logo
1:30 pm - 3:56 am
YYZ
-
DEN
16h 26m2 stops
$228Multiple Airlines
Mon, Jan 26 - Tue, Feb 10
WestJet Logo
12:15 pm - 12:42 am
DEN
-
YUL
10h 27m1 stop
WestJet Logo
5:30 pm - 11:25 am
YUL
-
DEN
19h 55m1 stop
$279WestJet
Fri, May 8 - Sat, May 16
WestJet Logo
12:15 pm - 12:42 am
DEN
-
YUL
10h 27m1 stop
WestJet Logo
6:45 am - 11:25 am
YUL
-
DEN
30h 40m1 stop
$291WestJet
Fri, May 1 - Sun, May 10
American Airlines Logo
4:30 pm - 3:08 pm
DEN
-
YUL
20h 38m1 stop
American Airlines Logo
3:50 pm - 12:48 pm
YUL
-
DEN
22h 58m1 stop
$325American Airlines
Thu, Feb 5 - Mon, Feb 9
Air Canada Logo
8:05 am - 9:21 pm
DEN
-
YXU
11h 16m2 stops
Air Canada Logo
5:40 pm - 4:53 pm
YXU
-
DEN
25h 13m2 stops
$610Air Canada
Tue, Feb 24 - Wed, Feb 25
Air Canada Logo
8:05 am - 9:21 pm
DEN
-
YXU
11h 16m2 stops
Air Canada Logo
5:10 am - 10:23 am
YXU
-
DEN
7h 13m1 stop
$728Air Canada
Tue, Feb 24 - Wed, Feb 25
United Airlines Logo
7:45 am - 9:21 pm
DEN
-
YXU
11h 36m2 stops
United Airlines Logo
5:10 am - 7:36 pm
YXU
-
DEN
16h 26m2 stops
$822United Airlines
Sat, Feb 21 - Sat, Feb 28
United Airlines Logo
1:25 pm - 9:21 pm
DEN
-
YXU
5h 56m1 stop
United Airlines Logo
5:10 am - 7:36 pm
YXU
-
DEN
16h 26m2 stops
$883United Airlines
Sat, Feb 21 - Sat, Feb 28

WestJet flights from Denver to Region of Ontario

Our best WestJet deals on Denver to Region of Ontario flight tickets
WestJet
May 22
DEN7:40 pmDenver Intl
8h 32m
1 stop
YYZ6:12 amToronto Pearson Intl
May 29
YYZ11:00 amToronto Pearson Intl
9h 50m
1 stop
DEN6:50 pmDenver Intl
$251
WestJet
May 8
DEN12:15 pmDenver Intl
10h 27m
1 stop
YUL12:42 amMontreal Pierre Elliott Trudeau Intl
May 16
YUL5:30 pmMontreal Pierre Elliott Trudeau Intl
19h 55m
1 stop
DEN11:25 amDenver Intl
$279
WestJet
May 21
DEN7:40 pmDenver Intl
9h 12m
1 stop
YYZ6:52 amToronto Pearson Intl
May 24
YYZ9:00 amToronto Pearson Intl
11h 50m
2 stops
DEN6:50 pmDenver Intl
$285

Alaska Airlines flights from Denver to Region of Ontario

Our best Alaska Airlines deals on Denver to Region of Ontario flight tickets
Alaska Airlines
Jan 22
DEN1:34 pmDenver Intl
24h 01m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 9
YYZ4:45 pmToronto Pearson Intl
21h 53m
1 stop
DEN12:38 pmDenver Intl
$346
Alaska Airlines
Jan 22
DEN1:34 pmDenver Intl
24h 01m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 7
YYZ4:45 pmToronto Pearson Intl
25h 28m
1 stop
DEN4:13 pmDenver Intl
$359
Alaska Airlines
Jan 22
DEN5:09 pmDenver Intl
20h 26m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 12
YYZ4:45 pmToronto Pearson Intl
9h 14m
1 stop
DEN11:59 pmDenver Intl
$435

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 January 8, 2026.
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

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Wed 1/28

7:30 am-11:20 pm

2 stops13h 50m

Toronto Pearson Intl

Mon 2/9

10:15 am-8:00 pm

1 stop11h 45m

$224

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Wed 1/28

7:30 am-11:20 pm

2 stops13h 50m

Toronto Pearson Intl

Sun 2/1

8:00 pm-9:01 am

1 stop15h 01m

$227

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 1/26

4:26 pm-6:47 am

1 stop12h 21m

Toronto Pearson Intl

Tue 2/10

1:30 pm-3:56 am

2 stops16h 26m

$228

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 5/8

12:15 pm-12:42 am

1 stop10h 27m

Montreal Pierre Elliott Trudeau Intl

Sat 5/16

5:30 pm-11:25 am

1 stop19h 55m

$279

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 5/1

12:15 pm-12:42 am

1 stop10h 27m

Montreal Pierre Elliott Trudeau Intl

Sun 5/10

6:45 am-11:25 am

1 stop30h 40m

$291

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Thu 2/5

4:30 pm-3:08 pm

1 stop20h 38m

Montreal Pierre Elliott Trudeau Intl

Mon 2/9

3:50 pm-12:48 pm

1 stop22h 58m

$325

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Tue 2/24

8:05 am-9:21 pm

2 stops11h 16m

London

Wed 2/25

5:40 pm-4:53 pm

2 stops25h 13m

$610

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Tue 2/24

8:05 am-9:21 pm

2 stops11h 16m

London

Wed 2/25

5:10 am-10:23 am

1 stop7h 13m

$728

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Sat 2/21

7:45 am-9:21 pm

2 stops11h 36m

London

Sat 2/28

5:10 am-7:36 pm

2 stops16h 26m

$822

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Sat 2/21

1:25 pm-9:21 pm

1 stop5h 56m

London

Sat 2/28

5:10 am-7:36 pm

2 stops16h 26m

$883

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 January is, on average, the cheapest month to fly to Region of Ontario from Denver, with most prices found around $317. If you aren’t able to travel during the month of January, then book flights to Region of Ontario from Denver during March instead. Flights to Region of Ontario in March, while not as cheap as those in January, still average around $322.

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 $645. 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 Monday will generally be more expensive and average around $798. 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 at noon. momondo users have found flights departing from Denver to Region of Ontario at noon for as low as $664. 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 $732.

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 $504 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 $380 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 24% 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

$308

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 Denver in the past 72 hours is $308. The best round-trip flight deal from Denver to Region of Ontario found on momondo in the last 72 hours is $536.
The fastest flight from Denver to Region of Ontario takes 3h 10m
Direct flights go from Denver to Region of Ontario every day.
There are 123 airports in Region of Ontario. From Denver 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 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
3,235 reviews
Search WestJet flights
Air CanadaPriceFrom $218Free CancellationRating
7.1
10,603 reviews
Search Air Canada flights
United AirlinesPriceFrom $289Free CancellationRating
7.4
9,139 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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