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$161+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$366
(Trip.com)

One-way from

$161
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$482
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 ($85 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 July 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 July 30, 2025.

This Trip.com deal was found by Cheapflights users on 7/30. 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.
Mon 8/2512:15 pmDEN - YOW
1 stop10h 26mWestJet
Thu 8/287:15 pmYOW - DEN
1 stop18h 12mWestJet
Deal found 7/30$366
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Fri 9/127:05 pmDEN - YOW
1 stop11h 18mAir Canada
Fri 9/199:35 amYOW - DEN
1 stop11h 48mAir Canada
Deal found 7/29$374
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/2512:15 pmDEN - YOW
1 stop15h 43mMultiple Airlines
Thu 8/285:45 amYOW - DEN
2 stops31h 42mMultiple Airlines
Deal found 7/30$406
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/1010:12 amDEN - YOW
1 stop6h 40mUnited Airlines
Mon 9/157:29 pmYOW - DEN
1 stop6h 30mUnited Airlines
Deal found 7/30$481

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 July 30, 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

Mon 8/25

12:15 pm-12:41 am

1 stop10h 26m

Ottawa

Thu 8/28

7:15 pm-11:27 am

1 stop18h 12m

$366

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 9/12

7:05 pm-8:23 am

1 stop11h 18m

Ottawa

Fri 9/19

9:35 am-7:23 pm

1 stop11h 48m

$374

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 8/25

12:15 pm-5:58 am

1 stop15h 43m

Ottawa

Thu 8/28

5:45 am-11:27 am

2 stops31h 42m

$406

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 9/10

10:12 am-6:52 pm

1 stop6h 40m

Ottawa

Mon 9/15

7:29 pm-11:59 pm

1 stop6h 30m

$481

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 10/1

2:00 pm-12:22 am

2 stops8h 22m

Ottawa

Wed 10/8

12:20 pm-11:04 pm

2 stops12h 44m

$766

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 9/12

12:15 pm-12:22 am

3 stops34h 07m

$161

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 10/12

11:15 am-8:14 pm

1 stop6h 59m

$165

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 10/12

12:15 pm-8:05 am

3 stops17h 50m

$206

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 9/10

11:59 pm-9:58 am

1 stop7h 59m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 $428). 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 July 30, 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 July 30, 2025.
Read through reviews of airlines operating flights from Denver to Ottawa, such as Delta, United Airlines, and WestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,975 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,837 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $366 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $374 and $481 round-trip. WestJet is priced at 26% 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 $161. Air Canada flights start at $165 while deals on United Airlines start at $214 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 $428). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$143Average$309FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$290Average$481FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$309Average$463FlexibilityNo cancel feeOn-time69%

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