YOW - DEN

$160 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 5/17. 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

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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Cheap Flight Deals 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.

Recent round-trip flight deals from Ottawa to Denver

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ottawa to Denver.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
WestJet Logo
5:55 am - 6:52 pmYOW-DEN
14h 57m2 stops
WestJet Logo
12:15 pm - 12:41 amDEN-YOW
10h 26m1 stop
$230WestJet
Find Deal
Thu, May 22 - Thu, May 29
WestJet Logo
7:15 pm - 6:52 pmYOW-DEN
25h 37m1 stop
WestJet Logo
12:15 pm - 12:41 amDEN-YOW
10h 26m1 stop
$236WestJet
Find Deal
Thu, Jun 5 - Mon, Jun 9
 Logo
10:30 am - 10:30 pmYOW-DEN
14h 00m2 stops
 Logo
7:00 am - 12:40 amDEN-YOW
15h 40m2 stops
Mon, Apr 14 - Wed, Apr 16
 Logo
6:10 pm - 3:56 amYOW-DEN
11h 46m1 stop
 Logo
9:57 am - 12:40 amDEN-YOW
12h 43m2 stops
Mon, Apr 14 - Wed, Apr 16
Delta Logo
5:55 am - 1:52 pmYOW-DEN
9h 57m2 stops
Delta Logo
6:20 am - 12:09 amDEN-YOW
15h 49m2 stops
$432Delta
Find Deal
Tue, Apr 15 - Fri, Apr 18
Delta Logo
5:55 am - 5:07 pmYOW-DEN
13h 12m2 stops
Delta Logo
10:40 am - 12:09 amDEN-YOW
11h 29m2 stops
$434Delta
Find Deal
Tue, Apr 15 - Fri, Apr 18
Air Canada Logo
9:25 am - 7:23 pmYOW-DEN
11h 58m1 stop
Air Canada Logo
7:05 pm - 8:23 amDEN-YOW
11h 18m1 stop
$642Air Canada
Find Deal
Fri, Sep 19 - Sun, Sep 21
Air Canada Logo
6:00 pm - 8:51 amYOW-DEN
16h 51m1 stop
Air Canada Logo
7:18 pm - 2:26 pmDEN-YOW
17h 08m1 stop
$749Air Canada
Find Deal
Tue, Apr 15 - Fri, Apr 18
United Airlines Logo
6:05 am - 6:04 pmYOW-DEN
13h 59m2 stops
United Airlines Logo
9:41 am - 9:35 pmDEN-YOW
9h 54m1 stop
$797United Airlines
Find Deal
Tue, Apr 15 - Fri, Apr 18
United Airlines Logo
6:33 am - 4:30 pmYOW-DEN
11h 57m1 stop
United Airlines Logo
11:59 pm - 1:24 pmDEN-YOW
11h 25m2 stops
$798United Airlines
Find Deal
Tue, Apr 15 - Fri, Apr 18

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.

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 November, where tickets cost $331 (return) on average. On the other hand, the most expensive months are May and January, where the average cost of round-trip tickets is $598 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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low season

April

High season

September

Cheapest flight

$160
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly and prices are also 8% 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 $160 for a one-way ticket and $230 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?

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

  • Which is the best airline for flights from Ottawa to Denver, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from Ottawa to Denver are United Airlines and Air Canada. With an average price for the route of $429 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $480 and an overall rating of 7.0.

  • 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.

See more FAQs

Top airlines 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.
7.4
United AirlinesOverall score based on 8615 reviews
7.3Comfort
7.0Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

8.0 ExcellentAnonymous, Mar 2025YVR - DEN
Read more United Airlines reviews

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

Not as good as expected Air Can needs to improve totally rated on internet as worst

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was 4 hours late. Almost missed my connecting flight no food or drinks on connecting flight. Overall terrible experience

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

The take off was delayed as we were told that the baggages had to be rearranged to balance the weight. I only took a carry-on and a personal item, but the overhead bin was extremely small, even a normal size carryon can’t fit it, so they had to check it in for free. The seat was really tight and no entertainment at all.

The only issues I have are the seats are very small and so is the overhead storage. You should mention that while booking flights. I had plenty of knee room but I am wider than my seat, and I am not fat at all. The Mitsubishi 900 models need to be upgraded to western size people. I do not know how a 300 pound woman fit into those seats. I had to continuously lean away from the aisle to keep people and flight crew from bumping into my shoulder. 3 hour flight so no entertainment or food, just snacks and a drink, which was no big deal. The buttery/garlic pretzels were pretty tasty.

The pork noodles were disgusting. The tuna sandwich had hardly any tuna and the bread was stale. A salad would have been better. An apple or a muffin.

I was overcharged either by United or sister airline Air Canada. It's exhausting dealing with companies nowadays that irresponsibly abuse access to credit/debit cards.

Air Canada is the worst but the only option for my route

The flight attendants that assisted me were exceptionally nice, kind and helpful

I was very good. Service was great. Seating selection was not too good.

Very good. But seat selection was not good. We were put on different rows. Would have been nicer to sit besides each other as a couple.

5-hour trip with just water and one cookie is not great: fruits and cheese,, salads, protein smoothie... It could be small but nourrishing No screen and no outlet to connect our electronic devices. If there were ,It would have been nice to be informed. Every instruction given in french by the agent on the plane was pronounced so quickly that despite french is my 1st language, I could not understand the instructions. Too fast, no intonation, no space between words. Most of the time, the english versions (my 2nd language) were fast but with breathing between words, good intonation and the information was much easier to understand.

The Flight Attendant was particularly helpful to my wife, who was having a bad day.

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

Information on your arrival and departure airports

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