DEN - YOW

$173 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 5/15. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$406
Typical prices: $872-$399
WestJet
Sat 6/6Wed 6/10
DEN - YOW • 2 stops
Cheapest one-way
$173
Typical prices: $614-$652
WestJet
Fri 5/15
DEN - YOW • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Denver and Ottawa. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $376 (round-trip)
Shortest trip • 5h 44m (one-way)
Insights
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When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
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+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ottawa!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Ottawa

Sat, Jun 6 - Wed, Jun 10
WestJet Logo
12:15 pm - 12:30 pm
DEN
-
YOW
22h 15m
2 stops
WestJet Logo
4:15 pm - 11:20 am
YOW
-
DEN
21h 05m
1 stop
$406WestJet
Wed, Jun 3 - Wed, Jun 10
WestJet Logo
12:15 pm - 5:35 am
DEN
-
YOW
15h 20m
1 stop
WestJet Logo
4:15 pm - 11:20 am
YOW
-
DEN
21h 05m
1 stop
$412WestJet
Wed, Jun 3 - Sun, Jun 7
WestJet Logo
12:15 pm - 5:35 am
DEN
-
YOW
15h 20m
1 stop
WestJet Logo
7:20 am - 11:20 am
YOW
-
DEN
30h 00m
1 stop
$414WestJet
Tue, May 26 - Tue, Jun 2
WestJet Logo
12:15 pm - 5:35 am
DEN
-
YOW
15h 20m
1 stop
WestJet Logo
7:20 am - 11:20 am
YOW
-
DEN
30h 00m
1 stop
$416WestJet
Tue, May 26 - Tue, Jun 2
WestJet Logo
12:15 pm - 5:35 am
DEN
-
YOW
15h 20m
1 stop
WestJet Logo
6:15 pm - 11:20 am
YOW
-
DEN
19h 05m
2 stops
$418WestJet
Sat, Jun 6 - Wed, Jun 10
WestJet Logo
12:15 pm - 5:35 am
DEN
-
YOW
15h 20m
1 stop
WestJet Logo
4:15 pm - 11:20 am
YOW
-
DEN
21h 05m
1 stop
$420WestJet
Tue, Jun 2 - Sun, Jun 7
WestJet Logo
12:15 pm - 12:30 pm
DEN
-
YOW
22h 15m
2 stops
WestJet Logo
7:20 am - 11:20 am
YOW
-
DEN
30h 00m
1 stop
$429WestJet
Tue, Jun 2 - Sat, Jun 6
WestJet Logo
12:15 pm - 12:30 pm
DEN
-
YOW
22h 15m
2 stops
WestJet Logo
6:15 pm - 11:20 am
YOW
-
DEN
19h 05m
2 stops
$431WestJet
Tue, Jun 2 - Sun, Jun 7
WestJet Logo
12:15 pm - 12:30 pm
DEN
-
YOW
22h 15m
2 stops
WestJet Logo
6:15 pm - 11:20 am
YOW
-
DEN
19h 05m
2 stops
$435WestJet
Tue, Jun 2 - Sun, Jun 7
WestJet Logo
12:15 pm - 5:35 am
DEN
-
YOW
15h 20m
1 stop
WestJet Logo
7:20 am - 11:20 am
YOW
-
DEN
30h 00m
1 stop
$436WestJet
Booking Insights

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.

How much is a round-trip flight from Denver to Ottawa?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to Ottawa departing in June.

What is the cheapest month to fly from Denver to Ottawa?

To calculate monthly average prices, KAYAK takes all prices for each month 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 median of all values for each month.

The cheapest month for flights from Denver to Ottawa is November, where tickets cost $0 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $1,050 and $838 respectively.

Good to know

Low seasonOctober
Cheapest flight$173
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly and prices are also 25% lower on average.
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 $173 for a one-way ticket and $406 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.

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

    The two airlines most popular with KAYAK users for flights from Denver to Ottawa are United Airlines and Air Canada. With an average price for the route of $518 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 $523 and an overall rating of 7.1.

  • 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.

Reviews of the 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 9680 reviews
7.7Boarding
7.1Entertainment
6.6Food
8.1Crew
7.3Comfort
Airline reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

8.0 ExcellentAnonymous, Apr 2026
DEN - IAD
Read more United Airlines reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

Putting people that close to the bathroom, where you have to look into the bathroom as people are exiting and entering was not great and the smell was also not great. I know the airlines are desperate for more chairs, but that seat is a crime.

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

one staffer was frustrated (it happen); the flight was late and the pilot mentioned they'll make amend but the snacks were the same, other than that the aircraft was clean and everything went smooth, no complaints

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

No seat back entertainment. And app had a hard time getting entertainment loaded.

ticket agent lady wás very helpful , she arranged wheel chair for my elderly mother

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Very tight seats - no legroom at all, very tight to the person in front of you. If you have basic fare, you are loading zone 6 regardless of where you are sitting in the plane - meaning even as a middle aisle person at the front of the plane, I had to get people to get up and let me in as they had boarded earlier. Having to pay for a carry on is criminal. I am a frequent flyer, and air Canada has now joined the list of other terrible North American Airlines.

Delayed by 5+ hours and they give a voucher for only $20 CAD which isn’t even redeemable at any place with edible food. Then took almost an hour to clean craft after it landed. And nonsensical boarding delayed even further. We didn’t leave until 1:30am….

Extremely disappointing. My original Denver–Vancouver–Bangkok itinerary was cancelled due to a crewing issue. I was not proactively supported and had to drive back home after already reaching the airport. Communication was poor throughout, and attempts to contact customer service resulted in being on hold for nearly three hours without reaching anyone. Instead of being rebooked on the same direct routing the following day, I was rerouted onto a much longer itinerary via multiple cities and airlines, which resulted in arriving approximately 30 hours later than scheduled. At Denver airport, there was no visible Air Canada representative available to properly assist. Ground staff offered no real support beyond directing passengers to a phone number. There was no clear communication, no ownership, and no meaningful customer care during a major disruption. The final journey involved three flights instead of the original two, significantly increasing travel time and stress. Overall, the handling of the cancellation and lack of customer support was unacceptable. What could have been better? Clear communication during the cancellation Accessible customer service (phone support that actually answers) Proper in-person assistance at the airport Rebooking onto a comparable routing rather than a significantly longer one

I travelled in Business class for the first time and wish I could do that again.

We had a very long delay. First the inbound flight took a while, then maintenance, they “fixed it” to then do boarding and leave the gate, and waste a lot of time to have to go back to the gate and eventually deplane. Had to wait for a new aircraft, wait for a gate, and do the whole thing again. Instead of leaving at 9:50am we left until past 1. I could’ve not woken up at 5am, or spend some more time with my family if they gave more grace period of time between flights to give some time in case of any issues. But they have to make all and every dollar possible

the seats aren't the most comfy -- too little padding and I could feel whatever the passenger behind me was doing. Otherwise, it's all good.

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

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.

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

Information on your arrival and departure airports