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Cheap flights from Denver to Ottawa from C$ 221

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 20/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

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 28 October 2025.

Round-trip from

C$ 530

One-way from

C$ 221

Popular in

January

Cheapest in

May

Average price

C$ 555
25/11-2/12
  • 25/11-2/12
  • 3 total stops
  • 42h 02m total
  • Denver to Ottawa
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20/2
  • 20/2
  • 2 total stops
  • 25h 25m total
  • Denver to Ottawa
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 40 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 33 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

Enter your travel dates to find the best prices.

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 28 October 2025.

Tue 25/116:22 a.m.DEN - YOW
1 stop9h 03mMultiple Airlines
Tue 2/1212:10 p.m.YOW - DEN
2 stops32h 59mMultiple Airlines
Deal found 28/10C$ 530
Mon 1/126:30 a.m.DEN - YOW
2 stops32h 43mMultiple Airlines
Sat 6/124:20 p.m.YOW - DEN
1 stop18h 04mMultiple Airlines
Deal found 28/10C$ 548
Fri 12/129:34 a.m.DEN - YOW
1 stop12h 24mMultiple Airlines
Fri 19/124:20 p.m.YOW - DEN
2 stops34h 04mMultiple Airlines
Deal found 28/10C$ 645
Sat 22/116:22 a.m.DEN - YOW
1 stop9h 03mMultiple Airlines
Sat 29/115:40 a.m.YOW - DEN
2 stops29h 28mMultiple Airlines
Deal found 28/10C$ 698

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 629,999 searches. Data last updated 28 October 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 25/11

6:22 a.m.-5:25 p.m.

1 stop9h 03m

Ottawa

Tue 2/12

3:55 p.m.-7:09 p.m.

1 stop29h 14m

C$ 531

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 3/3

12:05 p.m.-11:58 p.m.

1 stop9h 53m

Ottawa

Thu 5/3

4:20 p.m.-7:50 a.m.

1 stop17h 30m

C$ 583

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 1/12

11:59 p.m.-5:13 p.m.

1 stop15h 14m

Ottawa

Sat 6/12

4:20 p.m.-8:24 a.m.

1 stop18h 04m

C$ 592

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 22/11

6:22 a.m.-5:25 p.m.

1 stop9h 03m

Ottawa

Sat 29/11

5:40 a.m.-9:08 a.m.

2 stops29h 28m

C$ 698

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 21/11

9:44 a.m.-2:44 p.m.

2 stops27h 00m

Ottawa

Sun 23/11

9:30 a.m.-5:13 p.m.

1 stop9h 43m

C$ 738

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 25/11

5:55 p.m.-5:12 p.m.

2 stops21h 17m

Ottawa

Tue 2/12

5:14 p.m.-10:02 a.m.

2 stops18h 48m

C$ 937

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 7/11

9:05 a.m.-11:58 p.m.

1 stop12h 53m

Ottawa

Sun 9/11

9:30 a.m.-11:16 p.m.

1 stop15h 46m

C$ 969

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 23/12

1:25 p.m.-11:08 p.m.

1 stop7h 43m

Ottawa

Tue 6/1

5:35 p.m.-4:45 p.m.

1 stop25h 10m

C$ 973

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 20/2

9:00 p.m.-12:25 a.m.

2 stops25h 25m

C$ 221

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 17/2

12:59 a.m.-11:58 p.m.

2 stops20h 59m

C$ 225

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 12 results
1
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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 C$ 152). Flying from Denver to Ottawa in October is currently the most expensive (average of C$ 383). 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 28 October 2025.
Check out reviews from past customers who have flown with United Airlines from Denver to Ottawa to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,001 reviews
Check prices

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

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
9,001 reviews
United Airlines
7.4
Good
9,001 reviews
Check prices

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

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 is the cheapest airline to fly from Denver to Ottawa round-trip?

    United Airlines, at C$ 247, was found to be the cheapest airline from Denver to Ottawa.. United Airlines is currently priced 66% below the average price you’ll pay for this route.

  • 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 C$ 152). Flying from Denver to Ottawa in October is currently the most expensive (average of C$ 383). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Smiths Falls
Perth
Prescott
Pembroke
Wakefield

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Denver to Ottawa

Discover the top airline 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 629,999 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 247AverageC$ 580FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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How does Cheapflights help users find flights from Denver to Ottawa?

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Can Cheapflights find flights from Denver to Ottawa with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Denver to Ottawa, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Denver to Ottawa become cheaper?

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