$134 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 2/23. 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
$255
Overall average: $429
WestJet
Tue 5/26Tue 6/2
YUL - DEN • 2 stops
Cheapest non-stop
$344
Typical prices: $461-$689
Air Canada
Sat 1/24Fri 1/30
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

Tue, May 26 - Tue, Jun 2
WestJet Logo
6:45 am - 11:25 am
YUL
-
DEN
30h 40m2 stops
WestJet Logo
12:15 pm - 12:42 am
DEN
-
YUL
10h 27m1 stop
$255WestJet
Thu, May 14 - Sun, May 17
WestJet Logo
6:45 am - 11:25 am
YUL
-
DEN
30h 40m2 stops
WestJet Logo
12:15 pm - 12:42 am
DEN
-
YUL
10h 27m1 stop
$264WestJet
Sat, Jan 24 - Fri, Jan 30
Multiple Airlines Logo
9:45 am - 5:49 pm
YYZ
-
DEN
10h 04m1 stop
Multiple Airlines Logo
6:32 pm - 2:20 pm
DEN
-
YYZ
17h 48m1 stop
$289Multiple Airlines
Sat, Jan 24 - Fri, Jan 30
Multiple Airlines Logo
9:45 am - 5:49 pm
YYZ
-
DEN
10h 04m1 stop
Multiple Airlines Logo
4:14 pm - 6:13 am
DEN
-
YYZ
11h 59m2 stops
$302Multiple Airlines
Sat, Jan 24 - Fri, Jan 30
Air Canada Logo
8:30 am - 10:23 am
YYZ
-
DEN
3h 53mnonstop
Air Canada Logo
1:25 pm - 6:35 pm
DEN
-
YYZ
3h 10mnonstop
$344Air Canada
Sat, Jan 24 - Fri, Jan 30
Air Canada Logo
1:00 pm - 7:55 pm
YYZ
-
DEN
8h 55m1 stop
Air Canada Logo
1:25 pm - 6:35 pm
DEN
-
YYZ
3h 10mnonstop
$347Air Canada
Thu, Jan 22 - Mon, Jan 26
Delta Logo
6:00 am - 10:46 pm
YYZ
-
DEN
18h 46m1 stop
Delta Logo
6:40 am - 10:56 pm
DEN
-
YYZ
14h 16m1 stop
$371Delta
Fri, Apr 17 - Sun, Apr 19
Delta Logo
5:40 am - 7:45 pm
YOW
-
DEN
16h 05m2 stops
Delta Logo
6:30 am - 12:39 am
DEN
-
YOW
16h 09m2 stops
$418Delta
Fri, Apr 17 - Sun, Apr 19
United Airlines Logo
5:20 pm - 11:44 pm
YOW
-
DEN
8h 24m1 stop
United Airlines Logo
7:45 am - 9:35 pm
DEN
-
YOW
11h 50m2 stops
$561United Airlines
Thu, Apr 16 - Sun, Apr 19
United Airlines Logo
6:00 am - 12:45 pm
YOW
-
DEN
8h 45m2 stops
United Airlines Logo
11:59 pm - 9:11 am
DEN
-
YOW
7h 12m1 stop
$622United Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$134
Best time to beat the crowds but there is an average 36% increase in price.
Most popular time to fly with an average 5% increase in price.
Flight from Toronto Pearson Airport to Denver

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 Airlines
YYZ
-
DEN
Aug 2024
Make sure to check the airline delay flights rate and if you have important commitments choose another airline.
JoshuaFlew with Air Canada
YYZ
-
DEN
Apr 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
Greenwood Village
Central City
Lone Tree
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)