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Cheap flights from Denver to Ottawa from C$ 363

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 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 27 January 2026.

Wed 1/412:13 a.m.
DEN
-
YOW
1 stop14h 57m
Multiple Airlines
Mon 6/45:40 a.m.
YOW
-
DEN
2 stops24h 19m
Multiple Airlines
Deal found 25/1C$ 600
Sun 22/211:59 p.m.
DEN
-
YOW
1 stop21h 59m
Multiple Airlines
Sun 1/33:55 p.m.
YOW
-
DEN
2 stops44h 06m
Multiple Airlines
Deal found 25/1C$ 612
Wed 11/311:59 p.m.
DEN
-
YOW
1 stop15h 18m
Multiple Airlines
Wed 18/34:15 p.m.
YOW
-
DEN
2 stops16h 47m
Multiple Airlines
Deal found 25/1C$ 649
Sat 31/12:41 p.m.
DEN
-
YOW
2 stops31h 17m
Multiple Airlines
Mon 16/210:10 a.m.
YOW
-
DEN
1 stop25h 01m
Multiple Airlines
Deal found 27/1C$ 720
Fri 13/34:44 p.m.
DEN
-
YOW
2 stops41h 51m
Multiple Airlines
Fri 27/310:10 a.m.
YOW
-
DEN
1 stop24h 16m
Multiple Airlines
Deal found 25/1C$ 783
Mon 22/612:15 p.m.
DEN
-
YOW
1 stop10h 25m
WestJet
Sun 28/66:15 a.m.
YOW
-
DEN
2 stops31h 10m
WestJet
Deal found 26/1C$ 935
Sat 20/612:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Sun 28/66:15 a.m.
YOW
-
DEN
2 stops14h 35m
WestJet
Deal found 26/1C$ 938
Mon 22/612:15 p.m.
DEN
-
YOW
1 stop10h 25m
WestJet
Mon 29/61:05 p.m.
YOW
-
DEN
2 stops24h 20m
WestJet
Deal found 26/1C$ 946
Mon 22/612:15 p.m.
DEN
-
YOW
1 stop10h 25m
WestJet
Tue 30/61:05 p.m.
YOW
-
DEN
2 stops24h 20m
WestJet
Deal found 26/1C$ 949

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 27 January 2026.

Round-trip from

C$ 816

One-way from

C$ 363

Popular in

February

Cheapest in

May

Average price

C$ 943
13/3-20/3
  • 13/3-20/3
  • 3 total stops
  • 46h 19m total
  • Denver to Ottawa
Search Deals
1/2
  • 1/2
  • 2 total stops
  • 33h 15m total
  • Denver to Ottawa
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 268 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 629,999 searches. Data last updated 27 January 2026.
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

Wed 1/4

12:13 a.m.-5:10 p.m.

1 stop14h 57m

Ottawa

Mon 6/4

5:40 a.m.-3:59 a.m.

2 stops24h 19m

C$ 600

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 13/3

4:44 p.m.-12:35 p.m.

2 stops41h 51m

Ottawa

Fri 27/3

10:10 a.m.-8:26 a.m.

1 stop24h 16m

C$ 783

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 22/6

12:15 p.m.-12:40 a.m.

1 stop10h 25m

Ottawa

Sun 28/6

6:15 a.m.-11:25 a.m.

2 stops31h 10m

C$ 935

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 21/6

12:15 p.m.-4:18 p.m.

2 stops26h 03m

Ottawa

Sun 28/6

6:15 a.m.-6:50 p.m.

2 stops14h 35m

C$ 938

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 22/6

12:15 p.m.-12:40 a.m.

1 stop10h 25m

Ottawa

Tue 30/6

1:05 p.m.-11:25 a.m.

2 stops24h 20m

C$ 949

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 22/6

12:15 p.m.-12:40 a.m.

1 stop10h 25m

Ottawa

Mon 29/6

7:15 p.m.-11:25 a.m.

1 stop18h 10m

C$ 954

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 19/6

7:50 p.m.-8:29 a.m.

1 stop10h 39m

Ottawa

Tue 23/6

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

1 stop9h 43m

C$ 978

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 1/2

10:29 p.m.-2:45 p.m.

3 stops38h 16m

C$ 398

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 1/7

7:50 p.m.-8:29 a.m.

1 stop10h 39m

C$ 448

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 25/6

7:50 p.m.-8:29 a.m.

1 stop10h 39m

C$ 463

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 13 results
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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$ 149). Flying from Denver to Ottawa in October is currently the most expensive (average of C$ 364). 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 27 January 2026.
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
9,205 reviews
Check prices

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

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
9,205 reviews
United Airlines
7.4
Good
9,205 reviews
Check prices

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

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 10h 25m. Fly via WestJet to get the fastest option. The distance between Denver and Ottawa is about 2435 km.

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

    United Airlines, at C$ 215, was found to be the cheapest airline from Denver to Ottawa.. United Airlines is currently priced 70% 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$ 149). Flying from Denver to Ottawa in October is currently the most expensive (average of C$ 364). 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
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 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 215AverageC$ 504FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Denver to Ottawa.

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?

Yes! Start tracking prices for Denver to Ottawa flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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