$120 Find Cheap Flights from Ontario to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Denver departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$300
Overall average: $636
Multiple Airlines
Fri 12/12Mon 12/15
YUL - DEN • 1 stop
Cheapest non-stop
$379
Typical prices: $364-$692
Air Canada
Fri 12/5Sun 12/7
YYZ - DEN • Non-stop
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Flight Deals
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Flight Deals

Cheap Flights from Ontario to Denver

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Denver

Fri, Dec 12 - Mon, Dec 15
Multiple Airlines Logo
5:10 pm - 1:23 amYUL-DEN
10h 13m1 stop
Multiple Airlines Logo
4:25 pm - 4:25 pmDEN-YUL
22h 00m1 stop
$300Multiple Airlines
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Fri, Dec 12 - Mon, Dec 15
Multiple Airlines Logo
5:10 pm - 1:23 amYUL-DEN
10h 13m1 stop
Multiple Airlines Logo
4:25 pm - 1:00 pmDEN-YUL
18h 35m2 stops
$310Multiple Airlines
Find Deal
Wed, Jan 28 - Mon, Feb 2
American Airlines Logo
3:52 pm - 10:48 amYUL-DEN
20h 56m1 stop
American Airlines Logo
4:30 pm - 3:08 pmDEN-YUL
20h 38m1 stop
$332American Airlines
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Sun, Feb 1 - Sun, Feb 8
Alaska Airlines Logo
4:45 pm - 11:35 pmYYZ-DEN
32h 50m1 stop
Alaska Airlines Logo
7:00 am - 3:35 pmDEN-YYZ
30h 35m1 stop
$371Alaska Airlines
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Sun, Feb 1 - Sun, Feb 8
Alaska Airlines Logo
4:45 pm - 4:13 pmYYZ-DEN
25h 28m1 stop
Alaska Airlines Logo
7:00 am - 3:35 pmDEN-YYZ
30h 35m1 stop
$372Alaska Airlines
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Fri, Dec 5 - Sun, Dec 7
Air Canada Logo
9:00 am - 5:44 pmYYZ-DEN
10h 44m1 stop
Air Canada Logo
1:25 pm - 6:35 pmDEN-YYZ
3h 10mnonstop
$379Air Canada
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Sat, Feb 14 - Sat, Feb 21
American Airlines Logo
6:00 am - 10:39 pmYYZ-DEN
18h 39m1 stop
American Airlines Logo
7:00 am - 9:29 pmDEN-YYZ
12h 29m1 stop
$385American Airlines
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Sat, Feb 14 - Sat, Feb 21
Air Canada Logo
12:30 pm - 7:55 pmYTZ-DEN
9h 25m1 stop
Air Canada Logo
11:15 am - 7:55 pmDEN-YTZ
6h 40m1 stop
$398Air Canada
Find Deal
Thu, Feb 5 - Mon, Feb 9
WestJet Logo
6:20 am - 8:07 pmYKF-DEN
39h 47m2 stops
WestJet Logo
7:10 am - 5:29 amDEN-YKF
20h 19m2 stops
$635WestJet
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Mon, Dec 29 - Wed, Jan 7
WestJet Logo
6:20 am - 4:56 pmYKF-DEN
36h 36m2 stops
WestJet Logo
7:10 am - 5:28 amDEN-YKF
20h 18m2 stops
$728WestJet
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Good to know

Low seasonJanuary
Best time to beat the crowds but there is an average 15% increase in price.
Most popular time to fly with an average 9% increase in price.

Flights from Ontario to Denver: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ontario to Denver 
Learn how KAYAK collects reviews and tips from users.
F.Flew with United AirlinesYYZ-DENAug 2024
Make sure to check the airline delay flights rate and if you have important commitments choose another airline.
JoshuaFlew with Air CanadaYYZ-DENApr 2024
Toronto's customs was one of the faster experiences I've had. They opened four more lanes to expedite the process when the lane got too long, to ensure we would all get through within around 15 minutes. The public transportation within the city is also top notch, in my opinion.

FAQs for booking flights from Ontario to Denver

  • How does KAYAK find such low prices on flights from Ontario to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Dillon
Westminster
Lakewood
Broomfield
Englewood
Central City
Lone Tree
Greenwood Village
Wheat Ridge
Limon
Brighton
Fort Morgan
Evergreen
Erie

Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver

Denver (DEN)