YOW - DEN

C$ 240 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 27/11. 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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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

Thu, 19 Feb - Tue, 24 Feb
Air Canada Logo
2:50 p.m. - 7:55 p.m.YOW-DEN
7h 05m1 stop
Air Canada Logo
7:05 p.m. - 6:43 a.m.DEN-YOW
9h 38m1 stop
C$ 375Air Canada
Find Deal
Mon, 16 Feb - Mon, 23 Feb
Air Canada Logo
2:50 p.m. - 7:55 p.m.YOW-DEN
7h 05m1 stop
Air Canada Logo
7:05 p.m. - 6:43 a.m.DEN-YOW
9h 38m1 stop
C$ 392Air Canada
Find Deal
Wed, 11 Feb - Thu, 19 Feb
Air Canada Logo
2:50 p.m. - 7:55 p.m.YOW-DEN
7h 05m1 stop
Air Canada Logo
7:05 p.m. - 6:43 a.m.DEN-YOW
9h 38m1 stop
C$ 393Air Canada
Find Deal
Sat, 1 Nov - Sun, 2 Nov
United Airlines Logo
6:20 a.m. - 10:35 a.m.YOW-DEN
6h 15m1 stop
United Airlines Logo
8:30 p.m. - 10:26 a.m.DEN-YOW
11h 56m1 stop
C$ 395United Airlines
Find Deal
Sat, 14 Feb - Tue, 24 Feb
United Airlines Logo
7:30 p.m. - 11:50 p.m.YOW-DEN
6h 20m1 stop
United Airlines Logo
6:00 a.m. - 4:30 p.m.DEN-YOW
8h 30m1 stop
C$ 400United Airlines
Find Deal
Sat, 1 Nov - Sun, 2 Nov
Multiple Airlines Logo
5:55 p.m. - 9:34 a.m.YOW-DEN
17h 39m1 stop
Multiple Airlines Logo
5:30 p.m. - 1:38 a.m.DEN-YOW
6h 08m1 stop
C$ 402Multiple Airlines
Find Deal
Fri, 31 Oct - Sun, 2 Nov
Multiple Airlines Logo
3:10 p.m. - 9:22 p.m.YOW-DEN
8h 12m1 stop
Multiple Airlines Logo
5:30 p.m. - 1:38 a.m.DEN-YOW
6h 08m1 stop
C$ 410Multiple Airlines
Find Deal
Thu, 13 Nov - Thu, 20 Nov
Air Canada Logo
10:20 a.m. - 4:40 p.m.YOW-DEN
8h 20m1 stop
Air Canada Logo
8:45 a.m. - 12:18 a.m.DEN-YOW
13h 33m1 stop
C$ 412Air Canada
Find Deal
Sat, 8 Nov - Sun, 16 Nov
Multiple Airlines Logo
5:55 p.m. - 8:34 a.m.YOW-DEN
16h 39m1 stop
Multiple Airlines Logo
5:30 p.m. - 9:46 a.m.DEN-YOW
14h 16m1 stop
C$ 421Multiple Airlines
Find Deal
Tue, 17 Feb - Sat, 21 Feb
United Airlines Logo
10:30 a.m. - 11:50 p.m.YOW-DEN
15h 20m1 stop
United Airlines Logo
11:50 p.m. - 2:30 p.m.DEN-YOW
12h 40m1 stop
C$ 475United Airlines
Find Deal

Everything you should know

Top airlines
Air Canada
Cheapest • from C$ 375 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 30% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
C$ 375
Overall average: C$ 781
Air Canada
Thu 19/2Tue 24/2
YOW - DEN • 1 stop
Cheapest one-way flights
C$ 240
Typical prices: C$ 211-C$ 634
Air Canada
Thu 27/11
YOW - DEN • 1 stop
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KAYAK searches hundreds 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.

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$ 458 (return) on average. On the other hand, the most expensive months are January and May, where the average cost of round-trip tickets is C$ 864 and C$ 827 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 3 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonApril
Cheapest flightC$ 240
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly (4% more expensive 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$ 171 for a one-way ticket and C$ 267 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$ 482 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$ 485 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.

Reviews of the top 3 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 8979 reviews
7.7Boarding
7.1Entertainment
6.6Food
8.1Crew
7.3Comfort
Airline reviews

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

10.0 ExcellentAnonymous, Oct 2025OGG - DEN
Read more United Airlines reviews

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

There is no snack and nit much that would be considered gluten free in yiur food selections. One of your snacks should be a gluten free cookie or small bar etc. maybe it was me but I didn’t see any free movies just internet connection and YouTube .

I like how spacious the plane was but I did not like the fact that there was no entertainment

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

Technology issues at the bag-check counter caused a delay, and we were unable to check out our bags, ultimately missing our flight. They offered no assistance other than telling us to book another flight out of Calgary. We arrived with plenty of time; if there hadn't been an issue with the kiosk and the length of the lines due to the technical issues, we could have made it home.

In spite of purchasing premium, I felt it was perhaps the most uncomfortable seat I have flown in. The base was either broken or poorly made and had no support. Even placing pillows and blankets on the seat (1D aisle) didn’t help. It made for a long and mostly sleepless six hour flight. Crew also were very loudly talking to each other through the night making it very hard to sleep. It was purchased for the price, so I get the risk, but was not impressed.

Good value, minor delay due to waiting for inbound plane but they gave accurate information about wait time. Able to switch to a seat by my husband thanks to a kind flight attendant

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Arrival at Comox from, London,ON 6 hours later... No bueano

Generally good. However. The flight left 30 mins behind schedule with no reason given.

Flight delayed, missed my pick-up had to Uber, plus missed dinner and medication, so sad!

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

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?

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

Information on your arrival and departure airports

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