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$158+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap 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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$350
(Kiwi.com)

One-way from

$158
(Kiwi.com)

Popular in

January

Cheapest in

May

Average price

$397
Provider with most accurate pricing for Denver Intl-Ottawa flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Ottawa flights.
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From Denver Intl to Ottawa
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One-way flight from Denver Intl to Ottawa
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Highest demand for flights based on searches. 3% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/256:22 amDEN - YOW
1 stop9h 03mMultiple Airlines
Tue 12/212:10 pmYOW - DEN
2 stops32h 59mMultiple Airlines
Deal found 10/28$379
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/16:30 amDEN - YOW
2 stops32h 43mMultiple Airlines
Sat 12/64:20 pmYOW - DEN
1 stop18h 04mMultiple Airlines
Deal found 10/28$392
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 12/129:34 amDEN - YOW
1 stop12h 24mMultiple Airlines
Fri 12/194:20 pmYOW - DEN
2 stops34h 04mMultiple Airlines
Deal found 10/28$461
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/226:22 amDEN - YOW
1 stop9h 03mMultiple Airlines
Sat 11/295:40 amYOW - DEN
2 stops29h 28mMultiple Airlines
Deal found 10/28$499

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 October 29, 2025.
Use the filters below to find and compare flights from Denver to Ottawa that are best for you.

Fly from

Denver

Fly to

Ottawa

Route

Depart

Return

Price

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 11/25

6:22 am-5:25 pm

1 stop9h 03m

Ottawa

Tue 12/2

3:55 pm-7:09 pm

1 stop29h 14m

$380

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 3/3

12:05 pm-11:58 pm

1 stop9h 53m

Ottawa

Thu 3/5

4:20 pm-7:50 am

1 stop17h 30m

$417

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 12/1

11:59 pm-5:13 pm

1 stop15h 14m

Ottawa

Sat 12/6

4:20 pm-8:24 am

1 stop18h 04m

$423

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 11/22

6:22 am-5:25 pm

1 stop9h 03m

Ottawa

Sat 11/29

5:40 am-9:08 am

2 stops29h 28m

$499

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 11/21

9:44 am-2:44 pm

2 stops27h 00m

Ottawa

Sun 11/23

9:30 am-5:13 pm

1 stop9h 43m

$528

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 11/25

5:55 pm-5:12 pm

2 stops21h 17m

Ottawa

Tue 12/2

5:14 pm-10:02 am

2 stops18h 48m

$670

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 12/23

1:25 pm-11:08 pm

1 stop7h 43m

Ottawa

Tue 1/6

5:35 pm-4:45 pm

1 stop25h 10m

$696

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 2/20

9:00 pm-12:25 am

2 stops25h 25m

$158

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 2/17

12:59 am-11:58 pm

2 stops20h 59m

$161

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 4/15

12:30 pm-2:44 pm

3 stops24h 14m

$330

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 11 results
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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Ottawa flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 October is currently the most expensive (average of $274). 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.

What is the cheapest time of day to fly from DEN to YOW?

Find hourly flight availability from Denver to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

A simple way to save on the total cost of your ticket is to fly from Denver to Ottawa in the afternoon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight at noon.

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 October 29, 2025.
Read through reviews of airlines operating flights from Denver to Ottawa, such as United Airlines, WestJet, 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
8,999 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.
United Airlines
7.4
Good
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.
WestJet
7.2
Good
3,148 reviews
United Airlines
7.4
Good
8,999 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.
Air Canada
7.1
Good
10,372 reviews
United Airlines
7.4
Good
8,999 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

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.

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

    Our cheapest airline available from Denver to Ottawa is WestJet. Our recent data shows that you can find tickets from as low as $143 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $290 and $319 round-trip. WestJet is priced at 72% 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 October is currently the most expensive (average of $274). 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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Top 3 airlines flying from Denver to Ottawa

Discover the top 3 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$143Average$309FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$290Average$512FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$319Average$481FlexibilityNo cancel feeOn-time69%

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