$125 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 5/30. 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

Sun, Jun 7 - Fri, Jun 12
Multiple Airlines Logo
9:45 am - 3:25 am
YYZ
-
DEN
19h 40m
1 stop
Multiple Airlines Logo
10:36 pm - 11:59 pm
DEN
-
YYZ
23h 23m
2 stops
$365Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
5:50 pm - 2:01 pm
YYZ
-
DEN
22h 11m
2 stops
Multiple Airlines Logo
12:15 pm - 12:10 am
DEN
-
YYZ
9h 55m
1 stop
$373Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
1:50 pm - 9:07 am
YTZ
-
DEN
21h 17m
1 stop
Multiple Airlines Logo
6:55 am - 8:00 am
DEN
-
YTZ
23h 05m
2 stops
$379Multiple Airlines
Thu, May 28 - Mon, Jun 1
Multiple Airlines Logo
9:50 am - 10:24 pm
YYZ
-
DEN
14h 34m
2 stops
Multiple Airlines Logo
6:10 am - 11:54 pm
DEN
-
YYZ
15h 44m
1 stop
$381Multiple Airlines
Fri, May 29 - Sat, Jun 6
Multiple Airlines Logo
9:40 am - 12:38 am
YYZ
-
DEN
16h 58m
1 stop
Multiple Airlines Logo
2:34 pm - 6:55 am
DEN
-
YYZ
14h 21m
2 stops
$382Multiple Airlines
Wed, May 13 - Wed, May 20
American Airlines Logo
11:33 am - 12:06 am
YYZ
-
DEN
14h 33m
1 stop
American Airlines Logo
6:19 am - 11:29 pm
DEN
-
YYZ
15h 10m
1 stop
$387American Airlines
Fri, Sep 11 - Fri, Sep 11
United Airlines Logo
11:23 am - 4:53 pm
YUL
-
DEN
7h 30m
1 stop
United Airlines Logo
7:25 pm - 8:16 am
DEN
-
YUL
10h 51m
1 stop
$418United Airlines
Fri, Sep 4 - Mon, Sep 7
WestJet Logo
5:30 pm - 11:20 am
YUL
-
DEN
19h 50m
1 stop
WestJet Logo
12:15 pm - 11:45 pm
DEN
-
YUL
9h 30m
1 stop
$423WestJet
Sat, May 2 - Tue, May 5
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
$423Air Canada
Fri, Jun 5 - Tue, Jun 9
WestJet Logo
6:15 pm - 11:20 am
YOW
-
DEN
19h 05m
2 stops
WestJet Logo
12:15 pm - 12:30 pm
DEN
-
YOW
22h 15m
2 stops
$454WestJet
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 and prices are also 19% lower on average.

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)