DEN - YOW

$155 Find Cheap Flights from Denver to Ottawa

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Ottawa departing on 7/19. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to Ottawa

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Ottawa, 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 Denver to Ottawa, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from Denver to Ottawa (DEN-YOW)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Ottawa 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 Denver to Ottawa

KAYAK's recommended round-trip deals from the most popular airlines that fly from Denver to Ottawa.
Discover the best prices for you by selecting your travel dates on KAYAK.
WestJet Logo
12:15 pm - 12:41 amDEN-YOW
10h 26m1 stop
WestJet Logo
7:15 pm - 6:52 pmYOW-DEN
25h 37m1 stop
$371WestJet
Find Deal
Wed, Jul 23 - Thu, Jul 31
WestJet Logo
12:15 pm - 12:41 amDEN-YOW
10h 26m1 stop
WestJet Logo
5:15 pm - 6:52 pmYOW-DEN
27h 37m2 stops
$376WestJet
Find Deal
Wed, Jul 23 - Thu, Jul 31
 Logo
12:15 pm - 3:21 pmDEN-YOW
25h 06m2 stops
 Logo
7:50 am - 6:52 pmYOW-DEN
13h 02m1 stop
Mon, Jun 9 - Sun, Jun 15
WestJet Logo
7:40 pm - 12:22 amDEN-YOW
26h 42m2 stops
WestJet Logo
7:15 pm - 11:27 amYOW-DEN
18h 12m1 stop
$389WestJet
Find Deal
Sun, Jun 22 - Tue, Jun 24
WestJet Logo
12:15 pm - 6:45 amDEN-YOW
16h 30m1 stop
WestJet Logo
5:55 am - 6:52 pmYOW-DEN
14h 57m2 stops
$390WestJet
Find Deal
Sat, Jul 12 - Fri, Jul 18
WestJet Logo
7:40 pm - 6:45 amDEN-YOW
9h 05m1 stop
WestJet Logo
7:15 pm - 11:27 amYOW-DEN
18h 12m1 stop
$393WestJet
Find Deal
Thu, Jun 12 - Fri, Jun 13
WestJet Logo
12:15 pm - 12:41 amDEN-YOW
10h 26m1 stop
WestJet Logo
7:50 am - 6:52 pmYOW-DEN
13h 02m1 stop
$398WestJet
Find Deal
Mon, Jun 9 - Sun, Jun 15
WestJet Logo
12:15 pm - 2:56 pmDEN-YOW
24h 41m1 stop
WestJet Logo
6:10 am - 11:27 amYOW-DEN
31h 17m2 stops
$402WestJet
Find Deal
Wed, Jun 25 - Thu, Jul 3
 Logo
7:40 pm - 10:21 amDEN-YOW
12h 41m2 stops
 Logo
2:10 pm - 11:27 amYOW-DEN
23h 17m3 stops
Thu, Jun 12 - Fri, Jun 13
Air Canada Logo
7:45 am - 5:05 pmDEN-YOW
7h 20m1 stop
Air Canada Logo
1:55 pm - 8:00 pmYOW-DEN
8h 05m1 stop
$920Air Canada
Find Deal
Sun, Jun 22 - Tue, Jun 24
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KAYAK's insights & trends for Denver to Ottawa flights

Get data-powered insights and trends into flights from Denver to Ottawa 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 Denver to Ottawa?

The average price of all round-trip flights from Denver to Ottawa clicked on KAYAK for each day over the last 12 months.

For Denver to Ottawa, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Ottawa back to Denver, the best deals are generally found on Wednesday, with Friday being the most expensive.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Ottawa, 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 Denver to Ottawa, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonOctober
High seasonSeptember
Cheapest flight$155
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Denver to Ottawa

When to book flights from Denver to Ottawa

Are your dates flexible? Find out the best times to travel from Denver to Ottawa 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 Denver to Ottawa

  • What is the cheapest flight from Denver to Ottawa?

    In the last 3 days, the lowest price for a flight from Denver to Ottawa was $155 for a one-way ticket and $371 for a round-trip.

  • Do I need a passport to fly between Denver and Ottawa?

    Yes

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

    On your way to Ottawa, you’ll fly out from Denver Intl. You’ll be landing at Ottawa.

  • Which aircraft models fly most regularly from Denver to Ottawa?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to Ottawa?

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

  • How does KAYAK find such low prices on flights from Denver to Ottawa?

    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 Denver to Ottawa.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Ottawa?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ottawa from Denver 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 Denver to Ottawa?

    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 Ottawa with an airline and back to Denver with another airline. Booking your flights between Denver and YOW 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 Denver to Ottawa?

    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 Ottawa from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from Denver to Ottawa

 
See real verified KAYAK customer reviews for airlines flying from Denver to Ottawa. 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 Denver to Ottawa? 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 8696 reviews
7.7Boarding
7.3Comfort
6.6Food
7.1Entertainment
8.1Crew
Airline reviews

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

8.0 ExcellentMark, Apr 2025DEN - NRT
Read more United Airlines reviews

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

I do prefer to fly United and have always had excellent service, except for bad weather. Flights are on time and staff is alway curtious and helpful

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

I hope these comments will find their way to AC customer experience team. Me and my spouse 50 years of aged coming back from 7 days perfect vacation... While boarding in FLL flight AC1621, one of the boarding agents (tall aged african american) man literelly yeld at my wife during the picture talking process. MAM ! STEP !! BACK !!! We are not illegal immegrants beying deported, nor are we in the millitary. We are customers returning home. This was unacceptable. While boarding in YYZ flight AC1154, one of the boarding agents (tall aged caucasian) man criticied with several complesant remarks my passport condition saying that I could not travel intl with it due to stain, decoloration, and BLOOD. My passport does not have blood on it! Yes it might be in less than perfect condition, but their are ways to talk to customer that does not imply not allow a boarding agent to be angry fathery like, or a custom agent looking at a suspicious individual. Both experience were less than acceptable for might I remind you a paying CUSTOMER returning home.

This flight didn't happen for me because of overbooking.

Comfortable seats and movies entertainment available. Better experience than the flight from Toronto to Denver.

It was delayed by almost 90 minutes and that messed up our plans but it was beyond UA’s control that is what we heard

Terrible experience, flight was delayed both ways. Limited compensation for the 5+ hour delay. Will not be flying Air Canada Rouge, and don’t recommend you do either.

The boarding was relatively quick, the crew welcoming and flight uneventful. The omission of meals on all airlines is unacceptable especially when the flight is during a mealtime such as this one, (lunchtime), is unacceptable.

Everything was simple and easy. The lady at the gate was super friendly, I wish I had her name to share. She's a little older, dark-haired. You can tell she likes her job and would be a great influence on any young people training with her.

During the pre-departure safety briefing, the flight attendants rushed through the mandatory safety announcements in both official languages, making it difficult for passengers to clearly understand the instructions. Given the importance of these messages for passenger safety, this lack of clarity was concerning. Perhaps use a recoded message to alleviate this concern. Additionally, the flight attendants appeared to lack the professional attentiveness typically expected during a flight. Rather than focusing on timely and courteous service, they seemed more engaged in personal conversations than in addressing the needs of passengers. I hope this feedback is taken constructively and helps in maintaining the high standards of professionalism and care that travelers expect from a national carrier: AC.

No Charging ports for personal electronics, which were required to use wifi entertainment.

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

Information on your arrival and departure airports

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