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Cheap flights from Denver to Ottawa from C$ 172

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 432

One-way from

C$ 172

Popular in

January

Cheapest in

October

Average price

C$ 619
Air Canada
  • Air Canada
  • 30/9-16/10
  • 2 total stops
  • 18h 07m total
  • Denver to Ottawa
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WestJet
  • WestJet
  • 6/10
  • 1 total stop
  • 10h 25m total
  • Denver to Ottawa
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Highest demand for flights based on searches. 14% potential increase in price (C$ 156 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 37 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 11 September 2025.

Tue 30/97:05 p.m.DEN - YOW
1 stop11h 18mAir Canada
Thu 16/105:15 a.m.YOW - DEN
1 stop6h 49mAir Canada
Deal found 10/9C$ 432
Tue 14/107:10 p.m.DEN - YOW
1 stop12h 01mMultiple Airlines
Thu 16/105:15 a.m.YOW - DEN
1 stop6h 49mMultiple Airlines
Deal found 11/9C$ 438
Wed 24/97:45 a.m.DEN - YOW
1 stop7h 19mAir Canada
Thu 16/105:15 a.m.YOW - DEN
1 stop6h 49mAir Canada
Deal found 10/9C$ 441
Sat 25/1012:00 p.m.DEN - YOW
2 stops26h 51mMultiple Airlines
Sat 1/119:30 a.m.YOW - DEN
1 stop15h 46mMultiple Airlines
Deal found 9/9C$ 449
Tue 30/99:10 p.m.DEN - YOW
2 stops14h 54mMultiple Airlines
Thu 16/105:15 a.m.YOW - DEN
1 stop6h 49mMultiple Airlines
Deal found 10/9C$ 452
Sat 25/101:25 p.m.DEN - YOW
1 stop10h 13mAir Canada
Sat 1/112:50 p.m.YOW - DEN
1 stop7h 05mAir Canada
Deal found 9/9C$ 486
Tue 23/121:25 p.m.DEN - YOW
1 stop7h 43mAir Canada
Tue 6/112:05 p.m.YOW - DEN
1 stop6h 35mAir Canada
Deal found 10/9C$ 495
Wed 22/1012:36 a.m.DEN - YOW
1 stop14h 21mMultiple Airlines
Sun 26/109:30 a.m.YOW - DEN
2 stops23h 41mMultiple Airlines
Deal found 11/9C$ 532
Wed 24/96:00 a.m.DEN - YOW
2 stops9h 04mUnited Airlines
Thu 16/105:15 a.m.YOW - DEN
1 stop6h 49mUnited Airlines
Deal found 10/9C$ 558
Thu 9/105:36 p.m.DEN - YOW
1 stop11h 58mAir Canada
Thu 16/105:15 a.m.YOW - DEN
1 stop6h 49mAir Canada
Deal found 10/9C$ 578

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 11 September 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 30/9

7:05 p.m.-8:23 a.m.

1 stop11h 18m

Ottawa

Thu 16/10

5:15 a.m.-10:04 a.m.

1 stop6h 49m

C$ 432

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 14/10

7:10 p.m.-9:11 a.m.

1 stop12h 01m

Ottawa

Thu 16/10

5:15 a.m.-10:04 a.m.

1 stop6h 49m

C$ 438

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 24/9

7:45 a.m.-5:04 p.m.

1 stop7h 19m

Ottawa

Thu 16/10

5:15 a.m.-10:04 a.m.

1 stop6h 49m

C$ 441

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 25/10

12:00 p.m.-4:51 p.m.

2 stops26h 51m

Ottawa

Sat 1/11

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

1 stop15h 46m

C$ 449

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 30/9

9:10 p.m.-2:04 p.m.

2 stops14h 54m

Ottawa

Thu 16/10

5:15 a.m.-10:04 a.m.

1 stop6h 49m

C$ 452

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 25/10

1:25 p.m.-1:38 a.m.

1 stop10h 13m

Ottawa

Sat 1/11

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

1 stop7h 05m

C$ 486

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 23/12

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

1 stop7h 43m

Ottawa

Tue 6/1

12:05 p.m.-4:40 p.m.

1 stop6h 35m

C$ 495

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 25/10

12:36 a.m.-5:13 p.m.

1 stop14h 37m

Ottawa

Sun 2/11

5:45 p.m.-3:59 a.m.

2 stops36h 14m

C$ 532

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 22/10

12:36 a.m.-4:57 p.m.

1 stop14h 21m

Ottawa

Sun 26/10

9:30 a.m.-7:11 a.m.

2 stops23h 41m

C$ 532

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 14/10

11:59 p.m.-3:04 p.m.

2 stops13h 05m

Ottawa

Thu 16/10

5:15 a.m.-11:58 a.m.

1 stop8h 43m

C$ 558

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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, October is the cheapest month in which you can book a flight from Denver to Ottawa (average of C$ 224). Flying from Denver to Ottawa in December is currently the most expensive (average of C$ 326). 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 11 September 2025.
Check out reviews from past customers who have flown with Air Canada 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.
Air Canada
7.1
Good
10,000 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

6.8

Food

6.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews
Check prices

Boarding

7.3

Overall

7.1

Entertainment

6.8

Food

6.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

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. The distance between Denver and Ottawa is about 2435 km.

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

    Air Canada, at C$ 171, was found to be the cheapest airline from Denver to Ottawa.. Air Canada is currently priced 75% below the average price you’ll pay for this route.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 172. Users have also found prices from C$ 184 and C$ 234 on United Airlines and Air Canada, respectively.

  • 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, October is the cheapest month in which you can book a flight from Denver to Ottawa (average of C$ 224). Flying from Denver to Ottawa in December is currently the most expensive (average of C$ 326). 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

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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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 171AverageC$ 955FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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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