YOW - DEN

C$ 212 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 15/7. 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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Flights 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, 9 Aug - Mon, 11 Aug
WestJet Logo
7:15 p.m. - 11:27 a.m.YOW-DEN
18h 12m1 stop
WestJet Logo
12:15 p.m. - 12:41 a.m.DEN-YOW
10h 26m1 stop
C$ 350WestJet
Find Deal
Wed, 30 Jul - Wed, 6 Aug
Air Canada Logo
5:15 a.m. - 10:20 a.m.YOW-DEN
7h 05m1 stop
Air Canada Logo
7:45 a.m. - 5:05 p.m.DEN-YOW
7h 20m1 stop
C$ 356Air Canada
Find Deal
Thu, 14 Aug - Tue, 9 Sep
WestJet Logo
7:15 p.m. - 11:27 a.m.YOW-DEN
18h 12m1 stop
WestJet Logo
12:15 p.m. - 12:40 a.m.DEN-YOW
10h 25m1 stop
C$ 376WestJet
Find Deal
Thu, 14 Aug - Tue, 9 Sep
Air Canada Logo
6:00 a.m. - 10:21 a.m.YOW-DEN
6h 21m1 stop
Air Canada Logo
7:05 p.m. - 8:23 a.m.DEN-YOW
11h 18m1 stop
C$ 382Air Canada
Find Deal
Thu, 14 Aug - Tue, 9 Sep
Air Canada Logo
6:00 a.m. - 10:21 a.m.YOW-DEN
6h 21m1 stop
Air Canada Logo
7:05 p.m. - 8:23 a.m.DEN-YOW
11h 18m1 stop
C$ 383Air Canada
Find Deal
Thu, 14 Aug - Tue, 9 Sep
United Airlines Logo
5:25 p.m. - 6:43 a.m.YOW-DEN
15h 18m1 stop
United Airlines Logo
9:40 a.m. - 9:35 p.m.DEN-YOW
9h 55m1 stop
C$ 390United Airlines
Find Deal
Thu, 14 Aug - Tue, 9 Sep
WestJet Logo
5:15 p.m. - 11:27 a.m.YOW-DEN
20h 12m2 stops
WestJet Logo
12:15 p.m. - 12:40 a.m.DEN-YOW
10h 25m1 stop
C$ 397WestJet
Find Deal
Thu, 14 Aug - Tue, 9 Sep
WestJet Logo
5:15 p.m. - 11:27 a.m.YOW-DEN
20h 12m2 stops
WestJet Logo
12:15 p.m. - 12:40 a.m.DEN-YOW
10h 25m1 stop
C$ 398WestJet
Find Deal
Thu, 4 Sep - Sun, 7 Sep
WestJet Logo
7:15 p.m. - 11:24 a.m.YOW-DEN
18h 09m1 stop
WestJet Logo
7:40 p.m. - 6:45 a.m.DEN-YOW
9h 05m1 stop
C$ 403WestJet
Find Deal
Sat, 19 Jul - Sun, 27 Jul
United Airlines Logo
5:25 p.m. - 11:22 p.m.YOW-DEN
7h 57m1 stop
United Airlines Logo
7:45 a.m. - 5:05 p.m.DEN-YOW
7h 20m1 stop
C$ 445United Airlines
Find Deal
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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 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 C$ 447 (return) on average. On the other hand, the most expensive months are May and January, where the average cost of round-trip tickets is C$ 796 and C$ 786 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 25 weeks before departure.


Good to know

Low seasonApril
High seasonSeptember
Cheapest flightC$ 212
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 30% 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 C$ 156 for a one-way ticket and C$ 258 for a round-trip.

  • Which airports will I be using when flying from Ottawa to Denver?

    When flying out of Ottawa you will be using Ottawa. You will be landing at Denver, also known as Denver Intl.

  • 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 is the only airline alliance operating flights between Ottawa and Denver.

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

    The two airlines most popular with KAYAK users for flights from Ottawa to Denver are United Airlines and WestJet. With an average price for the route of C$ 637 and an overall rating of 7.4, United Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 413 and an overall rating of 7.2.

  • 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.

  • 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.

Top 3 airlines serving 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 8798 reviews
6.6Food
7.3Comfort
8.1Crew
7.0Entertainment
7.7Boarding
Airline reviews

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

10.0 ExcellentAnonymous, Jun 2025YVR - DEN
Read more United Airlines reviews

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

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.

The seats are totally uncomfortable making the flight less than pleasant. The cookies & pretzels were terrible!!!

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

The small prop plane was crowded and the overhead luggage storage is a smaller than on the jets. Other than that, the crew was good, the flight was on time and the landing was smooth.

There was a medical emergency that the crew handled very well. There was no “entertainment” of any sort-no movie/music/whatever. Food was typical of airlines: mediocre.

Late departure, so I missed connection in Detroit. But Delta gave me a great hotel & breakfast. Just sorry I could not get anything from my checked baggage.

Crew was friendly. Lost our luggage and told us it’d be in later in the evening of the day we returned. It was not. Still after 5 days have not received it.

Internet on both flights was sketchy. Thus in flight entertainment was non- existent on MN - Balrimote leg.

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

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.

Poor planning meant the plane was delayed an hour, then a thunder storm started and the ground staff couldn't work. Eventual arrival in Santiago was 3 hours late resulting in missed connections and the need to buy new tickets.

Staff was friendly helpful also good timing I rate it a 10 out of 10

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.

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

Information on your arrival and departure airports

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