$150 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 5/11. 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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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

Mon, Apr 27 - Fri, May 1
Multiple Airlines Logo
6:30 am - 9:27 am
YYZ
-
DEN
28h 57m
2 stops
Multiple Airlines Logo
9:00 pm - 2:27 pm
DEN
-
YYZ
15h 27m
1 stop
$373Multiple Airlines
Sat, Apr 11 - Wed, Apr 15
Multiple Airlines Logo
2:20 pm - 11:08 pm
YYZ
-
DEN
10h 48m
1 stop
Multiple Airlines Logo
11:59 pm - 2:05 pm
DEN
-
YYZ
12h 06m
2 stops
$376Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
7:15 am - 5:23 pm
YYZ
-
DEN
12h 08m
1 stop
Multiple Airlines Logo
10:29 pm - 7:36 pm
DEN
-
YYZ
19h 07m
2 stops
$378Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
Delta Logo
9:30 am - 9:05 pm
YUL
-
DEN
13h 35m
1 stop
Delta Logo
5:55 pm - 8:40 am
DEN
-
YUL
12h 45m
1 stop
$408Delta
Tue, Apr 21 - Tue, Apr 28
Delta Logo
9:30 am - 9:27 pm
YUL
-
DEN
13h 57m
2 stops
Delta Logo
5:55 pm - 8:40 am
DEN
-
YUL
12h 45m
1 stop
$414Delta
Thu, May 7 - Sun, May 10
Air Canada Logo
12:30 pm - 7:00 pm
YTZ
-
DEN
8h 30m
1 stop
Air Canada Logo
9:40 am - 7:52 pm
DEN
-
YTZ
8h 12m
1 stop
$424Air Canada
Wed, Apr 22 - Wed, Apr 29
American Airlines Logo
12:30 pm - 11:59 pm
YUL
-
DEN
13h 29m
1 stop
American Airlines Logo
7:00 am - 10:58 pm
DEN
-
YUL
13h 58m
1 stop
$439American Airlines
Sun, Jun 7 - Wed, Jun 10
WestJet Logo
8:40 pm - 11:20 am
YKF
-
DEN
16h 40m
1 stop
WestJet Logo
12:15 pm - 7:50 pm
DEN
-
YKF
29h 35m
1 stop
$440WestJet
Tue, May 5 - Wed, May 6
American Airlines Logo
1:03 pm - 11:59 pm
YUL
-
DEN
12h 56m
2 stops
American Airlines Logo
6:30 pm - 2:44 pm
DEN
-
YUL
18h 14m
1 stop
$449American Airlines
Fri, Jul 24 - Mon, Jul 27
WestJet Logo
8:40 pm - 11:20 am
YKF
-
DEN
16h 40m
1 stop
WestJet Logo
12:15 pm - 7:50 pm
DEN
-
YKF
29h 35m
1 stop
$453WestJet
Useful Info

Good to know

Low seasonJanuary
Best time to beat the crowds but there is an average 39% increase in price.
Most popular time to fly with an average 13% 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 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
Westminster
Lakewood
Dillon
Broomfield
Englewood
Greenwood Village
Lone Tree
Central City
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)