$174 Find Cheap Flights from Ontario to Denver - Compare and Save

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 9/26. 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

Tue, Aug 4 - Tue, Aug 11
WestJet Logo
10:25 pm - 11:20 am
YYZ
-
DEN
14h 55m
1 stop
WestJet Logo
12:15 pm - 12:10 am
DEN
-
YYZ
9h 55m
1 stop
$364WestJet
Fri, Sep 4 - Sun, Sep 6
WestJet Logo
1:30 pm - 11:20 am
YYZ
-
DEN
23h 50m
1 stop
WestJet Logo
12:15 pm - 12:10 am
DEN
-
YYZ
9h 55m
1 stop
$365WestJet
Mon, Aug 24 - Tue, Aug 25
Multiple Airlines Logo
12:55 pm - 9:44 pm
YYZ
-
DEN
10h 49m
1 stop
Multiple Airlines Logo
12:15 pm - 10:45 pm
DEN
-
YYZ
8h 30m
1 stop
$366Multiple Airlines
Tue, Aug 18 - Tue, Aug 25
WestJet Logo
2:25 pm - 11:20 am
YYZ
-
DEN
22h 55m
2 stops
WestJet Logo
12:15 pm - 12:10 am
DEN
-
YYZ
9h 55m
1 stop
$368WestJet
Tue, Aug 4 - Tue, Aug 11
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
$370WestJet
Sun, Aug 23 - Sun, Aug 30
WestJet Logo
7:00 am - 11:20 am
YYZ
-
DEN
30h 20m
1 stop
WestJet Logo
12:15 pm - 9:10 pm
DEN
-
YYZ
30h 55m
2 stops
$370WestJet
Tue, Nov 3 - Thu, Nov 5
Multiple Airlines Logo
1:10 pm - 9:49 pm
YTZ
-
DEN
10h 39m
1 stop
Multiple Airlines Logo
5:56 pm - 2:25 pm
DEN
-
YTZ
18h 29m
1 stop
$372Multiple Airlines
Tue, Aug 11 - Wed, Aug 19
American Airlines Logo
1:15 pm - 11:59 pm
YYZ
-
DEN
12h 44m
1 stop
American Airlines Logo
6:56 am - 11:29 pm
DEN
-
YYZ
14h 33m
1 stop
$373American Airlines
Tue, Aug 11 - Wed, Nov 4
Delta Logo
6:00 am - 10:55 pm
YUL
-
DEN
18h 55m
2 stops
Delta Logo
8:06 am - 11:22 pm
DEN
-
YUL
13h 16m
2 stops
$416Delta
Wed, Aug 12 - Tue, Nov 3
Delta Logo
7:00 am - 10:55 pm
YUL
-
DEN
17h 55m
2 stops
Delta Logo
8:06 am - 11:22 pm
DEN
-
YUL
13h 16m
2 stops
$417Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$174
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly and prices are also 15% lower on average.
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.

Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver

Denver (DEN)