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$173+ Cheap flights from Denver (DEN) to Ottawa (YOW)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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Cheap flight deals from Denver to Ottawa

Cheapest flights from Denver to Ottawa
Explore the most affordable flight options available from Denver to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/612:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Wed 6/104:15 pm
YOW
-
DEN
1 stop21h 05m
WestJet
Deal found 4/26$406
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/312:15 pm
DEN
-
YOW
1 stop15h 20m
WestJet
Wed 6/104:15 pm
YOW
-
DEN
1 stop21h 05m
WestJet
Deal found 4/26$412
This Trip.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/312:15 pm
DEN
-
YOW
1 stop15h 20m
WestJet
Sun 6/77:20 am
YOW
-
DEN
1 stop30h 00m
WestJet
Deal found 4/26$414
This FlightHub deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:15 pm
DEN
-
YOW
1 stop15h 20m
WestJet
Tue 6/27:20 am
YOW
-
DEN
1 stop30h 00m
WestJet
Deal found 4/26$416
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/810:29 pm
DEN
-
YOW
2 stops29h 06m
Multiple Airlines
Mon 6/151:20 pm
YOW
-
DEN
1 stop24h 00m
Multiple Airlines
Deal found 4/24$427
This FlightHub deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/212:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Sun 6/77:20 am
YOW
-
DEN
1 stop30h 00m
WestJet
Deal found 4/26$429
This FlightHub deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1912:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Tue 6/234:15 pm
YOW
-
DEN
1 stop21h 05m
WestJet
Deal found 4/23$431
This FlightHub deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1912:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Sun 6/216:15 pm
YOW
-
DEN
2 stops19h 05m
WestJet
Deal found 4/23$432

Find flight deals from Denver to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Ottawa (YOW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$406
(Kiwi.com)

One-way from

$173
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$790
Provider with most accurate pricing for Denver Intl-Ottawa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Ottawa flights.
Search Deals
From Denver Intl to Ottawa
Search Deals
One-way flight from Denver Intl to Ottawa
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($205 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Ottawa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 28, 2026.
Use the filters below to find and compare flights from Denver to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 6/19

12:15 pm-12:30 pm

2 stops22h 15m

Ottawa

Sun 6/21

1:20 pm-11:20 am

1 stop24h 00m

$431

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 6/19

12:15 pm-12:30 pm

2 stops22h 15m

Ottawa

Tue 6/23

6:15 pm-11:20 am

2 stops19h 05m

$436

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 7/24

12:15 pm-12:30 pm

2 stops46h 15m

Ottawa

Mon 7/27

6:15 pm-11:20 am

2 stops19h 05m

$495

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 7/17

6:45 am-12:40 am

2 stops15h 55m

Ottawa

Mon 7/20

8:15 pm-11:20 am

1 stop17h 05m

$538
Quickest round-trip

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 6/5

12:25 pm-12:20 am

2 stops9h 55m

Ottawa

Sun 6/7

12:25 pm-11:31 pm

2 stops13h 06m

$544

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 6/10

1:15 pm-12:20 am

2 stops9h 05m

Ottawa

Wed 6/17

6:55 am-8:44 pm

2 stops15h 49m

$552

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 6/1

6:05 am-12:20 am

2 stops16h 15m

Ottawa

Sun 6/7

12:25 pm-11:31 pm

2 stops13h 06m

$569

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 6/8

6:00 am-12:20 am

2 stops16h 20m

Ottawa

Mon 6/15

6:55 am-5:39 pm

2 stops12h 44m

$577

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 6/6

6:05 am-5:35 pm

2 stops9h 30m

Ottawa

Tue 6/9

6:55 am-8:44 pm

2 stops15h 49m

$577

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 7/17

12:15 pm-5:35 am

1 stop15h 20m

Ottawa

Mon 7/20

1:20 pm-11:20 am

1 stop24h 00m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Denver to Ottawa

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Ottawa in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Ottawa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Ottawa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Ottawa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Ottawa flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Denver to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How much does it cost to fly round-trip from Denver to Ottawa?

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ottawa. Reviews last updated April 28, 2026.
Read through reviews of airlines operating flights from Denver to Ottawa, such as United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,672 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,672 reviews
United Airlines
7.4
Good
9,672 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Air Canada
7.1
Good
10,975 reviews
United Airlines
7.4
Good
9,672 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Denver to Ottawa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Denver to Ottawa?

    There are many flights that can get you from Denver to Ottawa in 22h 15m. Fly via WestJet to get the fastest option. Denver and Ottawa are separated by a distance of 1513 mi.

  • What are the cheapest airlines flying from Denver to Ottawa round-trip?

    Our cheapest airline available from Denver to Ottawa is Air Canada. Our recent data shows that you can find tickets from as low as $186 on this airline. An additional option worth looking into is United Airlines, starting at $367. Air Canada is priced at 71% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Denver to Ottawa that include hotel bookings?

    Yes. In addition to deals on Denver to Ottawa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Ottawa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Ottawa.

  • Can I find deals for business class flights from Denver to Ottawa?

    Yes. Cheapflights offers flight deals from Denver to Ottawa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Petawawa

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Alternative routes for Denver to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Pearson Intl flights
Denver to Hamilton flights
Denver to London flights
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Aspen to Ottawa flights

Top 2 airlines flying from Denver to Ottawa

Discover the top 2 airlines that operate flights from Denver to Ottawa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$186Average$521FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$367Average$515FlexibilityNo cancel feeOn-time69%

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