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Cheap flights from Denver to Ottawa from C$ 236

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
9 Apr — 16 Apr1
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 10 March 2026.

Tue 21/411:59 p.m.
DEN
-
YOW
1 stop15h 14m
Multiple Airlines
Tue 28/46:55 a.m.
YOW
-
DEN
2 stops23h 04m
Multiple Airlines
Deal found 6/3C$ 522
Sat 28/38:00 a.m.
DEN
-
YOW
2 stops26h 35m
Multiple Airlines
Mon 6/49:35 a.m.
YOW
-
DEN
1 stop15h 33m
Multiple Airlines
Deal found 7/3C$ 567
Tue 14/410:38 a.m.
DEN
-
YOW
1 stop8h 52m
Multiple Airlines
Wed 22/47:00 a.m.
YOW
-
DEN
2 stops17h 29m
Multiple Airlines
Deal found 7/3C$ 592
Thu 26/36:45 a.m.
DEN
-
YOW
2 stops39h 40m
Multiple Airlines
Mon 6/49:35 a.m.
YOW
-
DEN
1 stop15h 33m
Multiple Airlines
Deal found 9/3C$ 616
Thu 23/46:30 a.m.
DEN
-
YOW
1 stop13h 00m
Multiple Airlines
Thu 30/410:00 a.m.
YOW
-
DEN
2 stops14h 59m
Multiple Airlines
Deal found 9/3C$ 620
Tue 7/49:00 p.m.
DEN
-
YOW
2 stops18h 25m
Multiple Airlines
Tue 14/410:35 a.m.
YOW
-
DEN
1 stop13h 09m
Multiple Airlines
Deal found 10/3C$ 628
Fri 10/411:59 p.m.
DEN
-
YOW
1 stop21h 59m
Multiple Airlines
Sun 19/49:30 a.m.
YOW
-
DEN
2 stops15h 49m
Multiple Airlines
Deal found 7/3C$ 649
Fri 10/46:00 a.m.
DEN
-
YOW
2 stops15h 58m
Multiple Airlines
Mon 13/49:30 a.m.
YOW
-
DEN
1 stop15h 39m
Multiple Airlines
Deal found 7/3C$ 665
Sun 5/49:25 a.m.
DEN
-
YOW
1 stop12h 33m
Multiple Airlines
Sun 12/44:20 p.m.
YOW
-
DEN
2 stops37h 39m
Multiple Airlines
Deal found 8/3C$ 680
Thu 26/36:45 a.m.
DEN
-
YOW
2 stops39h 40m
Multiple Airlines
Sun 5/44:20 p.m.
YOW
-
DEN
1 stop26h 38m
Multiple Airlines
Deal found 9/3C$ 692

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 10 March 2026.

Round-trip from

C$ 522

One-way from

C$ 236

Popular in

April

Cheapest in

March

Average price

C$ 213
21/4-28/4
  • 21/4-28/4
  • 3 total stops
  • 38h 18m total
  • Denver to Ottawa
Search Deals
25/4
  • 25/4
  • 1 total stop
  • 21h 59m total
  • Denver to Ottawa
Search Deals
High demand for flights, 17% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 10 March 2026.
Use the filters below to find and compare flights from Denver to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 21/4

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

1 stop15h 14m

Ottawa

Tue 28/4

6:55 a.m.-3:59 a.m.

2 stops23h 04m

C$ 522

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 5/4

9:25 a.m.-11:58 p.m.

1 stop12h 33m

Ottawa

Sun 12/4

4:20 p.m.-3:59 a.m.

2 stops37h 39m

C$ 680

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 19/6

12:52 p.m.-12:50 a.m.

1 stop9h 58m

Ottawa

Wed 24/6

4:15 p.m.-11:20 a.m.

1 stop21h 05m

C$ 930

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 19/6

11:15 p.m.-4:53 p.m.

1 stop15h 38m

Ottawa

Tue 23/6

4:15 p.m.-11:20 a.m.

1 stop21h 05m

C$ 967

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 7/4

10:04 a.m.-11:54 p.m.

2 stops11h 50m

Ottawa

Tue 14/4

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

2 stops14h 00m

C$ 981
Quickest round-trip

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 19/6

3:50 p.m.-11:54 p.m.

1 stop6h 04m

Ottawa

Sun 21/6

6:25 a.m.-10:31 a.m.

1 stop6h 06m

C$ 1,010

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 4/8

11:34 a.m.-11:54 p.m.

2 stops10h 20m

Ottawa

Sun 9/8

7:30 p.m.-12:30 a.m.

1 stop7h 00m

C$ 1,023

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 10/4

12:34 p.m.-10:05 p.m.

1 stop7h 31m

Ottawa

Sun 19/4

6:00 a.m.-2:51 p.m.

3 stops10h 51m

C$ 1,024

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 9/4

6:00 a.m.-5:06 p.m.

2 stops9h 06m

Ottawa

Mon 13/4

2:50 p.m.-7:55 p.m.

1 stop7h 05m

C$ 1,065

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 19/6

12:15 p.m.-12:30 p.m.

2 stops22h 15m

Ottawa

Tue 23/6

7:20 a.m.-11:20 a.m.

1 stop30h 00m

C$ 1,096

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 18 resultsSorted by cheapest first
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, August is the cheapest month in which you can book a flight from Denver to Ottawa (average of C$ 148). Flying from Denver to Ottawa in February is currently the most expensive (average of C$ 430). 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 10 March 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
9,409 reviews
Check prices

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

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
9,409 reviews
United Airlines
7.4
Good
9,409 reviews
Check prices

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

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.

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

    United Airlines, at C$ 213, 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$ 148). Flying from Denver to Ottawa in February is currently the most expensive (average of C$ 430). 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
Perth
Wakefield
Pembroke
Smiths Falls

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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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 213AverageC$ 496FlexibilityNo 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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Why should you use Cheapflights to find cheap flight tickets from Denver to Ottawa?

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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