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YOW - DEN

$278 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 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 6/21
Fri 6/28

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 travelers have searched 42,596,105 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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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
5:30 pm - 6:53 amYOW-DEN
15h 23m1 stop
6:10 am - 9:52 pmDEN-YOW
13h 42m1 stop
$421United Airlines
Find Deal
Mon, Jul 22 - Sat, Jul 27
5:55 am - 10:27 amYOW-DEN
6h 32m1 stop
9:45 am - 8:49 pmDEN-YOW
9h 04m1 stop
$430Air Canada
Find Deal
Tue, Jun 25 - Thu, Jun 27
5:55 am - 10:30 amYOW-DEN
6h 35m1 stop
7:00 pm - 6:19 amDEN-YOW
9h 19m1 stop
$431Air Canada
Find Deal
Sun, Jun 16 - Sun, Jun 23
6:00 pm - 10:52 pmYOW-DEN
6h 52m1 stop
6:00 am - 9:48 pmDEN-YOW
13h 48m1 stop
$436United Airlines
Find Deal
Sat, Jun 8 - Wed, Jun 12
9:45 pm - 12:34 pmYOW-DEN
16h 49m1 stop
5:32 pm - 1:33 amDEN-YOW
6h 01m1 stop
$453Air Canada
Find Deal
Fri, Jul 12 - Wed, Jul 24
5:55 am - 10:27 amYOW-DEN
6h 32m1 stop
8:55 pm - 4:41 pmDEN-YOW
17h 46m1 stop
$462Air Canada
Find Deal
Wed, Jun 26 - Sun, Jun 30
5:00 pm - 1:32 pmYOW-DEN
46h 32m2 stops
2:20 pm - 12:37 amDEN-YOW
8h 17m1 stop
$467WestJet
Find Deal
Thu, Jul 18 - Fri, Aug 9
6:55 pm - 7:41 amYOW-DEN
14h 46m2 stops
4:18 pm - 11:42 amDEN-YOW
17h 24m1 stop
Tue, Jun 25 - Thu, Jun 27
5:55 am - 10:27 amYOW-DEN
6h 32m1 stop
9:58 am - 8:13 pmDEN-YOW
8h 15m1 stop
$479Air Canada
Find Deal
Fri, Aug 30 - Mon, Sep 2
6:07 am - 1:32 pmYOW-DEN
9h 25m1 stop
2:20 pm - 12:37 amDEN-YOW
8h 17m1 stop
$512WestJet
Find Deal
Tue, Sep 3 - Thu, Sep 12

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.
Your flight ticket price will generally be cheaper if you fly to Denver on a Sunday and more expensive on a Wednesday. On your return trip to Ottawa, you should consider flying back on a Friday, and avoid Tuesdays for better 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 $532 on average. On the other hand, the most expensive months are March and October, where the average cost of tickets is $639 and $635 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.

Good to know

Low season

April

High season

September

Cheapest flight

$278
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 11% 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 $278 for a one-way ticket and $421 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 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 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 $609 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 $648 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 10870 reviews
7.1Entertainment
7.2Comfort
7.7Boarding
6.7Food
8.1Crew
Airline reviews

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

2.0 Mediocreabricker1, May 2024DRO - DEN
Read more about United Airlines reviews

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

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

Seriously need to improve the time schedule and the plans

Great TV, easy boarding, wonderful ground crew and flight crew.

Rude Customer Service at checkin, 90 minute limit in flight check in is too strict. I was in line for 30 minutes because of slow/insufficient workers. Somewhere I got to the the counter of course the employee warned me about the 90 minutes. People were cutting the lines. No one did anything.

Everything was great. I really like how they had their safety film set up showing you the beauty of the country.

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

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
$278
9/9Mon
2 stopsWestJet
24h 07mYOW-DEN
$305

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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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