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YOW - DEN

Find cheap flights from Ottawa to Denver from C$ 290

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 9/9. 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
0 bags
Fri 7/6
Fri 14/6

Search 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
In the last 7 days, travellers have searched 43,968,530 times on KAYAK, and here is why:

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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.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:07 a.m. - 1:32 p.m.YOW-DEN
9h 25m1 stop
2:20 p.m. - 12:37 a.m.DEN-YOW
8h 17m1 stop
C$ 514WestJet
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Tue, 3 Sep - Thu, 12 Sep
5:55 a.m. - 1:26 p.m.YOW-DEN
9h 31m1 stop
2:20 p.m. - 12:41 a.m.DEN-YOW
8h 21m1 stop
C$ 515WestJet
Find Deal
Wed, 25 Sep - Wed, 2 Oct
6:07 a.m. - 1:32 p.m.YOW-DEN
9h 25m1 stop
2:20 p.m. - 12:37 a.m.DEN-YOW
8h 17m1 stop
C$ 520WestJet
Find Deal
Tue, 3 Sep - Thu, 12 Sep
6:07 a.m. - 1:32 p.m.YOW-DEN
9h 25m1 stop
2:20 p.m. - 12:37 a.m.DEN-YOW
8h 17m1 stop
C$ 552WestJet
Find Deal
Wed, 10 Jul - Wed, 17 Jul
5:30 a.m. - 9:56 a.m.YOW-DEN
6h 26m1 stop
6:00 a.m. - 11:55 p.m.DEN-YOW
15h 55m1 stop
C$ 559United Airlines
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Sat, 8 Jun - Wed, 12 Jun
5:55 a.m. - 10:15 a.m.YOW-DEN
6h 20m1 stop
5:35 p.m. - 1:36 a.m.DEN-YOW
6h 01m1 stop
C$ 560Air Canada
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Thu, 24 Oct - Sun, 27 Oct
9:45 p.m. - 2:51 p.m.YOW-DEN
19h 06m1 stop
7:00 p.m. - 6:24 a.m.DEN-YOW
9h 24m1 stop
C$ 594Air Canada
Find Deal
Tue, 2 Jul - Tue, 9 Jul
8:05 a.m. - 11:54 p.m.YOW-DEN
17h 49m2 stops
12:59 a.m. - 5:27 p.m.DEN-YOW
14h 28m1 stop
C$ 614
Find Deal
Wed, 10 Jul - Tue, 16 Jul
4:15 p.m. - 11:54 p.m.YOW-DEN
9h 39m1 stop
12:59 a.m. - 5:27 p.m.DEN-YOW
14h 28m1 stop
C$ 644
Find Deal
Wed, 10 Jul - Tue, 16 Jul
5:30 a.m. - 5:37 p.m.YOW-DEN
14h 07m2 stops
6:10 a.m. - 5:04 p.m.DEN-YOW
8h 54m1 stop
C$ 796United Airlines
Find Deal
Tue, 2 Jul - Tue, 9 Jul

Flights from Ottawa to Denver - Travel Insights & Trends

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 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, Saturday is the most expensive day to fly from Ottawa to Denver. For your return ticket, we recommend flying on a Monday 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 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$ 733 on average. On the other hand, the most expensive months are June and March, where the average cost of tickets is C$ 887 and C$ 875 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from Ottawa to Denver, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 68 days before departure.

Which airlines provide the cheapest flights from Ottawa to Denver?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Ottawa to Denver found on KAYAK was with WestJet for C$ 290. WestJet proposed a round-trip connection from C$ 514 and United Airlines from C$ 559.

Good to know

Low season

April

High season

September

Cheapest flight

C$ 290
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly and prices are also 12% 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$ 212 for a one-way ticket and C$ 375 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, WestJet or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ottawa to Denver are WestJet and United Airlines. With an average price for the route of C$ 727 and an overall rating of 7.5, WestJet is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 854 and an overall rating of 7.4.

  • 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.

See more FAQs

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.
7.5
WestJetOverall score based on 2945 reviews
6.5Entertainment
6.5Food
8.2Crew
7.3Comfort
7.7Boarding
Airline reviews

Too many oversized carryon baggage. If carrier reduced checked luggage fee this could be avoided. The staff were friendly and helpful, very professional.

8.0 ExcellentRoy, May 2024YQT - YWG
Read more about WestJet reviews

Too many oversized carryon baggage. If carrier reduced checked luggage fee this could be avoided. The staff were friendly and helpful, very professional.

Nice smooth flight with pleasant stewards. Slept most of the flight, they could have slowly turned on the lights to make it more pleasant. Otherwise a good trip.

Great! No food was available during the flight due to the catering service strike but snacks were given throughout the flight which was nice.

I wish that seats closer to the front of the plan were available, but when I booked the flight the seats were VERY expensive so I did not book seats at that time. The day before flying only seats at the back of the plane were available. It takes so long to board the plane and empty the plane on arrival due to SO many roller bags.

Crew was rude.didn’t even say hi or welcome to board

Nothing special. Unacceptable wait for baggage on arriving in Calgary

Departure delay on a late night flight. Made us even later. Tired but got home.

Westjet forced me to put my carry-on baggage in check-in probably because I was assigned seat 23A (the last row seat), which had no cabin space, which is unfair. I wanted to carry on my luggage so that I don't have to wait at the airport for my luggage. Also, because there was no cabin space, I was forced to keep my laptop bag under the seat, which I didn't want to as I was carrying 2 laptops and charger. The airline should basically tell people that if you are assigned a last row seat, then you are not allowed a cabin baggage or a personal item.

Easy processing, flight time was quick and staff was professional and kind.

It was delayed by two ours very full no room to move

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the room where it was being kept.

T hey did a great job. Flight was on time .

Positive: Entertainment via phone on the short was great and my first time. Good food and wine and head phones for free. Negative: Seat hardly reclined on the long flight. Breakfast was an egg with a bun. No egg choices and rather have something sweet like bun/jam and Youghurt.

They did get us booked on a later flight, but it made us miss our connecting flight. So, we had to stay and another state overnight with no luggage or clothes. Because they kept our luggage at airport for next flight on the next day.

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Crew is way too many times on the intercom re explaining the same thing

Amazing comfortable chairs great snacks super friendly staff pilots did excellent job. Smooth sailing all the way. Definitely be flying United more.

We waited too long to get water while the plane was on the Tarmac awaiting de-icing.

My experience was pretty frustrating because the first leg of my flight on United (though booked through Air Canada) was delayed causing me to miss my connecting flight on Air Canada. This could have been an easy solve as there was a direct flight later that morning via Air Canada that they easily could have put me on which would have only gotten me to my destination 2 1/2 hours later but because United and Air Canada don’t seem to have good communication they gave me the run around both telling me to talk with the other which I did three times to no avail. I ended up taking the delayed flight and getting on a new connecting flight which ended up getting me to my destination 6 hours later and I missed the event I was planning to go to this evening.

I liked the early check in. Flight was a bit bumpy due yo weather. Overall, everything went well.

Limited snack options cause the snack vendor was on strike

I was appalled to have to pay for just a regular seat when I went to book 24 hrs before my flight! Because it was only an hour flight I didn’t choose a seat from Grand Junction to Denver, but I did for Toronto and had to pay just to choose a regular available seat! In my 60+ years of flying this was the first time I have heard of this. Also, allowing people to bring on “huge “ suitcases, not carry on size, but much bigger, and then a large pack pack stuffed. So they take up all the room in the overhead bins and if we are later boarding, there is no room so we have to check our small carry on. I have already paid for and checked in one bag! I certainly will not choose to fly with United again unless it is the “only” airline available!

It was an excellent experience, traveling from Toronto to Denver with United.

Ontime boarding. Almost 1 hour take off delay. We could have boarded slightly later since the pilots were in traffic

Fresh fuit or veg snacks would be so great, but there are two good restaurants in Denver airport. Try Etais UDIS or Freshens DIA for nutritious delicious pita sandwiches/ donairs and crepes in Freshens.

Crowded plane but it flew on time and had friendly staff

This was the first AC flight in a long time that we experienced no delays or frustrations. The gate attendant was extremely polite and accommodating to my husband who has Parkinson’s disease which made boarding extremely stress free. Flight departed ON TIME and was a smooth ride. If only all my AC experiences could be like this.

The Air Canada agent was very helpful helping with my luggage and cat carrier when I went there instead of United.

Book cheap flights from Ottawa to Denver

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ottawa to Denver found on KAYAK in the last 72 hours.
9/9Mon
1 stopWestJet
9h 32mYOW-DEN
C$ 290
8/6Sat
2 stops
17h 03mYOW-DEN
C$ 300
5/7Fri
1 stopUnited Airlines
7h 22mYOW-DEN
C$ 322
9/9Mon
2 stopsWestJet
24h 07mYOW-DEN
C$ 330
5/7Fri
2 stops
22h 01mYOW-DEN
C$ 378
8/6Sat
3 stops
27h 56mYOW-DEN
C$ 407
5/7Fri
3 stops
26h 53mYOW-DEN
C$ 416

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Last minute flights from Ottawa to Denver

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ottawa to Denver that are departing in the next 10 days.
9/5Thu
multi-stopAir Canada
6h 35mYOW-DEN
13/5Mon
multi-stopAir Canada
9h 21mDEN-YOW
C$ 1,186
9/5Thu
multi-stopAir Canada
11h 14mYOW-DEN
13/5Mon
multi-stopAir Canada
9h 21mDEN-YOW
C$ 1,189
9/5Thu
multi-stopUnited Airlines
13h 30mYOW-DEN
13/5Mon
multi-stopUnited Airlines
13h 32mDEN-YOW
C$ 1,511
9/5Thu
multi-stopLufthansa
28h 05mYOW-DEN
13/5Mon
multi-stopLufthansa
39h 37mDEN-YOW
C$ 15,931
9/5Thu
multi-stopLufthansa
28h 05mYOW-DEN
13/5Mon
multi-stopLufthansa
39h 37mDEN-YOW
C$ 15,957

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Ottawa - Denver Flights

Departure:

Ottawa (undefined)Canada

Destination:

Denver (DEN)United States

Return flight deals:

Denver - Ottawa

Cabin classes:

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