YOW - DEN

$153 Find Cheap Flights from Ottawa 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 from Ottawa to Denver departing on 10/15. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to Denver, as well as popular online travel agencies
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Booking Insights
Flight Deals

Cheap Flights from Ottawa to Denver (YOW-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ottawa 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 Ottawa to Denver

Sat, Oct 11 - Sat, Oct 18
United Airlines Logo
5:15 am - 10:04 amYOW-DEN
6h 49m1 stop
United Airlines Logo
1:25 pm - 9:35 pmDEN-YOW
6h 10m1 stop
$241United Airlines
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Fri, Oct 3 - Wed, Oct 22
United Airlines Logo
5:50 pm - 11:15 pmYOW-DEN
7h 25m1 stop
United Airlines Logo
6:00 am - 4:43 pmDEN-YOW
8h 43m1 stop
$251United Airlines
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Tue, Oct 14 - Tue, Oct 21
United Airlines Logo
5:25 pm - 6:42 amYOW-DEN
15h 17m1 stop
United Airlines Logo
6:00 am - 2:04 pmDEN-YOW
6h 04m1 stop
$252United Airlines
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Tue, Oct 14 - Tue, Oct 21
United Airlines Logo
5:50 pm - 11:15 pmYOW-DEN
7h 25m1 stop
United Airlines Logo
11:59 pm - 1:09 pmDEN-YOW
11h 10m2 stops
$258United Airlines
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Tue, Oct 7 - Tue, Oct 21
Multiple Airlines Logo
3:35 pm - 3:59 amYOW-DEN
14h 24m2 stops
Multiple Airlines Logo
12:36 am - 4:57 pmDEN-YOW
14h 21m1 stop
$288Multiple Airlines
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Tue, Oct 7 - Sat, Oct 18
Multiple Airlines Logo
3:35 pm - 11:10 amYOW-DEN
21h 35m2 stops
Multiple Airlines Logo
12:36 am - 4:57 pmDEN-YOW
14h 21m1 stop
$293Multiple Airlines
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Thu, Oct 2 - Mon, Oct 6
Air Canada Logo
5:15 am - 5:18 pmYOW-DEN
14h 03m2 stops
Air Canada Logo
6:05 pm - 8:23 amDEN-YOW
12h 18m1 stop
$303Air Canada
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Thu, Oct 9 - Mon, Oct 13
Air Canada Logo
8:35 am - 4:29 pmYOW-DEN
9h 54m1 stop
Air Canada Logo
6:05 pm - 8:23 amDEN-YOW
12h 18m1 stop
$328Air Canada
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Sat, Oct 4 - Sat, Oct 18
Delta Logo
5:55 am - 5:20 pmYOW-DEN
13h 25m2 stops
Delta Logo
5:45 am - 12:22 amDEN-YOW
16h 37m2 stops
$364Delta
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Tue, Oct 7 - Fri, Oct 10
Delta Logo
5:55 am - 5:28 pmYOW-DEN
13h 33m2 stops
Delta Logo
6:15 am - 6:20 pmDEN-YOW
34h 05m2 stops
$431Delta
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $241 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 42% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 29% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$241
Typical prices: $274-428
United Airlines
Sat 10/11Sat 10/18
YOW - DEN • 1 stop
Cheapest one-way
$153
Typical prices: $182-188
United Airlines
Wed 10/15
YOW - DEN • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Booking Insights

KAYAK's insights & trends for Ottawa to Denver flights

Get data-powered insights and trends into flights from Ottawa to Denver to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Ottawa to Denver?

What’s the cheapest day of the week to fly from Ottawa to Denver?

The average price of all round-trip flights from Ottawa to Denver clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Denver on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Ottawa to Denver. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Ottawa to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ottawa to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ottawa to Denver is September, where tickets cost $326 (return) on average. On the other hand, the most expensive months are May and January, where the average cost of round-trip tickets is $586 and $579 respectively.

How far in advance should I book a flight from Ottawa to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ottawa to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ottawa to Denver, you should book around 4 weeks before departure, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Find deals

Good to know

Low seasonApril
Cheapest flight$153
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly and prices are also 27% lower on average.
Flight from Ottawa to Denver

When to book flights from Ottawa to Denver

Are your dates flexible? Find out the best times to travel from Ottawa to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ottawa to Denver

  • What is the cheapest flight from Ottawa to Denver?

    In the last 3 days, the lowest price for a flight from Ottawa to Denver was $153 for a one-way ticket and $241 for a round-trip.

  • Do I need a passport to fly between Ottawa and Denver?

    A passport is required to fly from Ottawa to Denver.

  • Which aircraft models fly most regularly from Ottawa to Denver?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ottawa to Denver?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Ottawa and Denver, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Ottawa 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 Ottawa to Denver.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Ottawa 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 Ottawa 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 Ottawa with another airline. Booking your flights between Ottawa and DEN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ottawa 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 Ottawa up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ottawa to Denver

 
See real verified KAYAK customer reviews for airlines flying from Ottawa to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ottawa to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 10000 reviews
7.8Crew
6.3Food
7.3Boarding
7.1Comfort
6.8Entertainment
Airline reviews

Flying with Air Canada is still better than the discount airlines like Flair. The seats are more comfortable and the on-board entertainment is better, with each seat having a built in screen and lots of content to watch. Onboard WIFI is also great to have, as well as plugs for charging. I think passengers in general are getting better at not bringing too much luggage onboard, and Air Canada is better at managing this without customers feeling like they are being taken advantage of with extra fees. I have travelled on different airlines and all seem to be loading faster, with fewer people bringing both a carry on and a personal item. Now I just bring one item and it fits under the seat so I don't need to worry about finding a place in the overhead bins. Overall, across the industry, asking customers to pay for carry on baggage is fair because it allows customers to only pay for what they need, and it helps to keep the planes on time. Kudos to Air Canada for its approach - the desired result is achieved without customers feeling that they are being surprised and caught with unexpected extra fees.

10.0 ExcellentAnonymous, Sep 2025YOW - YVR
Read more Air Canada reviews

Flying with Air Canada is still better than the discount airlines like Flair. The seats are more comfortable and the on-board entertainment is better, with each seat having a built in screen and lots of content to watch. Onboard WIFI is also great to have, as well as plugs for charging. I think passengers in general are getting better at not bringing too much luggage onboard, and Air Canada is better at managing this without customers feeling like they are being taken advantage of with extra fees. I have travelled on different airlines and all seem to be loading faster, with fewer people bringing both a carry on and a personal item. Now I just bring one item and it fits under the seat so I don't need to worry about finding a place in the overhead bins. Overall, across the industry, asking customers to pay for carry on baggage is fair because it allows customers to only pay for what they need, and it helps to keep the planes on time. Kudos to Air Canada for its approach - the desired result is achieved without customers feeling that they are being surprised and caught with unexpected extra fees.

Due to the strike by AC flight attendants, my flight was cancelled. Very disappointing! A refund is being processed. This was not a Kayak issue. I will be sure to come back to Kayak in the future.

I did not noticed baggage was separate - I had assumed international flights included luggage, so it surprised me I had to pay to check a bag.

Staff was very courteous and kept things organized. We will definitely use Air Canada for further travel

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

Great flights. 90 minute departure delay for maintenance issues, not a great start but, afer that very good. Didn't pay extra for seats and lucked into a window and an aisle seat. Price was excellent at the super low economy level.

Just a little improvement on food but everything is excellent

flight landed late almost 1.00hr and we 4 passengers missed our connected flight to indianapolis, we need to get the hotel and taxi for the next day flight to home in indianapolis, cost us $ 300 more

They lost my checked in luggage, why do I pay for my cargo not arriving at the same destination as me?

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Everything you need to know for your flight from Ottawa to Denver

Information on your arrival and departure airports

Ottawa (YOW)
Denver (DEN)

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