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$179+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
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 March 13, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/13. 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 5/610:29 pm
DEN
-
YOW
2 stops29h 06m
Multiple Airlines
Mon 5/114:20 pm
YOW
-
DEN
1 stop18h 04m
Multiple Airlines
Deal found 3/13$407
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/2511:59 pm
DEN
-
YOW
1 stop21h 59m
Multiple Airlines
Sat 5/27:20 am
YOW
-
DEN
2 stops28h 42m
Multiple Airlines
Deal found 3/11$436
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/251:09 pm
DEN
-
YOW
2 stops21h 26m
Multiple Airlines
Wed 4/299:30 am
YOW
-
DEN
1 stop15h 29m
Multiple Airlines
Deal found 3/12$452
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Thu 3/266:45 am
DEN
-
YOW
2 stops39h 40m
Multiple Airlines
Mon 4/69:35 am
YOW
-
DEN
1 stop15h 33m
Multiple Airlines
Deal found 3/9$454
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Thu 4/236:30 am
DEN
-
YOW
1 stop13h 00m
Multiple Airlines
Thu 4/3010:00 am
YOW
-
DEN
2 stops14h 59m
Multiple Airlines
Deal found 3/9$457
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Tue 4/79:00 pm
DEN
-
YOW
2 stops18h 25m
Multiple Airlines
Tue 4/1410:35 am
YOW
-
DEN
1 stop13h 09m
Multiple Airlines
Deal found 3/10$463
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/2710:29 pm
DEN
-
YOW
2 stops29h 06m
Multiple Airlines
Mon 5/44:20 pm
YOW
-
DEN
1 stop18h 04m
Multiple Airlines
Deal found 3/13$470
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Thu 3/269:00 pm
DEN
-
YOW
2 stops25h 25m
Multiple Airlines
Tue 4/1410:35 am
YOW
-
DEN
1 stop13h 09m
Multiple Airlines
Deal found 3/10$484
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/811:59 pm
DEN
-
YOW
1 stop21h 59m
Multiple Airlines
Wed 4/157:00 am
YOW
-
DEN
2 stops17h 29m
Multiple Airlines
Deal found 3/11$486
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Thu 3/266:45 am
DEN
-
YOW
2 stops39h 40m
Multiple Airlines
Sun 4/54:20 pm
YOW
-
DEN
1 stop26h 38m
Multiple Airlines
Deal found 3/9$510

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$407
(Kiwi.com)

One-way from

$179
(Kiwi.com)

Popular in

April

Cheapest in

March

Average price

$157
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
High demand for flights, 16% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 13, 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

Wed 4/8

11:59 pm-11:58 pm

1 stop21h 59m

Ottawa

Wed 4/15

7:00 am-10:29 pm

2 stops17h 29m

$486

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 4/30

11:08 pm-4:53 pm

1 stop15h 45m

Ottawa

Sun 5/3

6:15 pm-11:20 am

2 stops19h 05m

$618

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 6/19

12:52 pm-12:50 am

1 stop9h 58m

Ottawa

Wed 6/24

4:15 pm-11:20 am

1 stop21h 05m

$685

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 4/29

12:15 pm-12:30 pm

2 stops22h 15m

Ottawa

Tue 5/12

4:00 pm-11:20 am

3 stops21h 20m

$692

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 4/7

10:04 am-11:54 pm

2 stops11h 50m

Ottawa

Tue 4/14

6:25 am-6:25 pm

2 stops14h 00m

$723

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 6/19

11:59 pm-9:11 am

1 stop7h 12m

Ottawa

Sun 6/21

2:52 pm-9:27 pm

1 stop8h 35m

$755

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 4/15

7:05 pm-6:45 am

1 stop9h 40m

Ottawa

Sun 4/19

5:00 am-10:18 am

1 stop7h 18m

$760
Quickest round-trip

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 5/22

11:59 pm-10:03 am

1 stop8h 04m

Ottawa

Fri 5/29

10:44 am-2:46 pm

1 stop6h 02m

$766
Cheapest one-way

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 4/30

10:29 pm-5:35 am

2 stops29h 06m

$215

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 4/14

11:59 pm-5:13 pm

1 stop15h 14m

$221

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/10

Showing 1-10 of 15 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 March.
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

What is the cheapest month to book a flight from Denver to Ottawa?

Currently, August is the cheapest month in which you can book a flight from Denver to Ottawa (average of $109). Flying from Denver to Ottawa in February is currently the most expensive (average of $317). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 March 13, 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
9,418 reviews

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

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
9,418 reviews
United Airlines
7.4
Good
9,418 reviews

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

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
10,800 reviews
United Airlines
7.4
Good
9,418 reviews

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

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 15h 20m. 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 $332. Air Canada is priced at 65% 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.

  • What is the cheapest month to book a flight from Denver to Ottawa?

    Currently, August is the cheapest month in which you can book a flight from Denver to Ottawa (average of $109). Flying from Denver to Ottawa in February is currently the most expensive (average of $317). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Aspen to Ottawa flights
Denver to London flights
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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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$186Average$510FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$332Average$481FlexibilityNo cancel feeOn-time69%

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