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$124+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$312
(Air Canada)

One-way from

$124
(FlightHub)

Popular in

January

Cheapest in

October

Average price

$447
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. 14% potential increase in price ($81 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:05 pmDEN - YOW
1 stop11h 18mAir Canada
Thu 10/165:15 amYOW - DEN
1 stop6h 49mAir Canada
Deal found 9/10$312
This United deal was found by Cheapflights users on 9/11. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:10 pmDEN - YOW
1 stop12h 01mMultiple Airlines
Thu 10/165:15 amYOW - DEN
1 stop6h 49mMultiple Airlines
Deal found 9/11$316
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:45 amDEN - YOW
1 stop7h 19mAir Canada
Thu 10/165:15 amYOW - DEN
1 stop6h 49mAir Canada
Deal found 9/10$318
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 10/2512:00 pmDEN - YOW
2 stops26h 51mMultiple Airlines
Sat 11/19:30 amYOW - DEN
1 stop15h 46mMultiple Airlines
Deal found 9/9$324
This United deal was found by Cheapflights users on 9/10. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/309:10 pmDEN - YOW
2 stops14h 54mMultiple Airlines
Thu 10/165:15 amYOW - DEN
1 stop6h 49mMultiple Airlines
Deal found 9/10$326
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/251:25 pmDEN - YOW
1 stop10h 13mAir Canada
Sat 11/12:50 pmYOW - DEN
1 stop7h 05mAir Canada
Deal found 9/9$351
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:25 pmDEN - YOW
1 stop7h 43mAir Canada
Tue 1/612:05 pmYOW - DEN
1 stop6h 35mAir Canada
Deal found 9/10$357
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/2212:36 amDEN - YOW
1 stop14h 21mMultiple Airlines
Sun 10/269:30 amYOW - DEN
2 stops23h 41mMultiple Airlines
Deal found 9/11$384
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/246:00 amDEN - YOW
2 stops9h 04mUnited Airlines
Thu 10/165:15 amYOW - DEN
1 stop6h 49mUnited Airlines
Deal found 9/10$403
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:36 pmDEN - YOW
1 stop11h 58mAir Canada
Thu 10/165:15 amYOW - DEN
1 stop6h 49mAir Canada
Deal found 9/10$417

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 September 11, 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 9/30

7:05 pm-8:23 am

1 stop11h 18m

Ottawa

Thu 10/16

5:15 am-10:04 am

1 stop6h 49m

$312

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 10/14

7:10 pm-9:11 am

1 stop12h 01m

Ottawa

Thu 10/16

5:15 am-10:04 am

1 stop6h 49m

$316

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 9/24

7:45 am-5:04 pm

1 stop7h 19m

Ottawa

Thu 10/16

5:15 am-10:04 am

1 stop6h 49m

$318

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 10/25

12:00 pm-4:51 pm

2 stops26h 51m

Ottawa

Sat 11/1

9:30 am-11:16 pm

1 stop15h 46m

$324

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 9/30

9:10 pm-2:04 pm

2 stops14h 54m

Ottawa

Thu 10/16

5:15 am-10:04 am

1 stop6h 49m

$326

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 10/25

1:25 pm-1:38 am

1 stop10h 13m

Ottawa

Sat 11/1

2:50 pm-7:55 pm

1 stop7h 05m

$351

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 12/23

1:25 pm-11:08 pm

1 stop7h 43m

Ottawa

Tue 1/6

12:05 pm-4:40 pm

1 stop6h 35m

$357

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 10/25

12:36 am-5:13 pm

1 stop14h 37m

Ottawa

Sun 11/2

5:45 pm-3:59 am

2 stops36h 14m

$384

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 10/22

12:36 am-4:57 pm

1 stop14h 21m

Ottawa

Sun 10/26

9:30 am-7:11 am

2 stops23h 41m

$384

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 10/14

11:59 pm-3:04 pm

2 stops13h 05m

Ottawa

Thu 10/16

5:15 am-11:58 am

1 stop8h 43m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 18 results
1
2

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, January is the cheapest month in which you can book a flight from Denver to Ottawa (average of $294). Flying from Denver to Ottawa in September is currently the most expensive (average of $419). 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 September 11, 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 30% 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 September 11, 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
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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
3,091 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

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.

  • How long is the flight from Denver to Ottawa?

    There are many flights that can get you from Denver to Ottawa in 11h 18m. Fly via Air Canada 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 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 $293 and $309 round-trip. WestJet is priced at 71% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Denver to Ottawa one-way?

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $124. United Airlines flights start at $133 while deals on Air Canada start at $169 one-way.

  • 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, January is the cheapest month in which you can book a flight from Denver to Ottawa (average of $294). Flying from Denver to Ottawa in September is currently the most expensive (average of $419). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$143Average$309FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$293Average$486FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$309Average$463FlexibilityNo cancel feeOn-time69%

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