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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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YOW
3 Aug — 10 Aug1
1 adult

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 29 July 2025.

Round-trip from

C$ 491

One-way from

C$ 221

Popular in

January

Cheapest in

October

Average price

C$ 661
WestJet
  • WestJet
  • 30/8-3/9
  • 2 total stops
  • 28h 35m total
  • Denver to Ottawa
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WestJet
  • WestJet
  • 12/9
  • 3 total stops
  • 34h 07m total
  • Denver to Ottawa
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Highest demand for flights based on searches. 14% potential increase in price (C$ 160 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 37 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 29 July 2025.

Sat 30/812:15 p.m.DEN - YOW
1 stop10h 26mWestJet
Wed 3/97:15 p.m.YOW - DEN
1 stop18h 09mWestJet
Deal found 26/7C$ 491
Sat 16/87:45 a.m.DEN - YOW
1 stop7h 20mAir Canada
Tue 26/86:00 a.m.YOW - DEN
1 stop6h 21mAir Canada
Deal found 26/7C$ 505
Fri 12/912:15 p.m.DEN - YOW
1 stop10h 25mMultiple Airlines
Fri 19/93:35 p.m.YOW - DEN
2 stops14h 25mMultiple Airlines
Deal found 29/7C$ 558
Sun 17/811:54 p.m.DEN - YOW
2 stops11h 16mUnited Airlines
Tue 26/86:25 a.m.YOW - DEN
2 stops8h 18mUnited Airlines
Deal found 26/7C$ 652

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 29 July 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

Sat 30/8

12:15 p.m.-12:41 a.m.

1 stop10h 26m

Ottawa

Wed 3/9

7:15 p.m.-11:24 a.m.

1 stop18h 09m

C$ 491

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 16/8

7:45 a.m.-5:05 p.m.

1 stop7h 20m

Ottawa

Tue 26/8

6:00 a.m.-10:21 a.m.

1 stop6h 21m

C$ 505

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 12/9

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

1 stop10h 25m

Ottawa

Fri 19/9

3:35 p.m.-4:00 a.m.

2 stops14h 25m

C$ 558

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 17/8

11:54 p.m.-1:10 p.m.

2 stops11h 16m

Ottawa

Tue 26/8

6:25 a.m.-12:43 p.m.

2 stops8h 18m

C$ 652

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 12/9

12:15 p.m.-12:22 a.m.

3 stops34h 07m

C$ 221

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 21/8

11:25 a.m.-9:20 p.m.

1 stop7h 55m

C$ 224

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sun 12/10

12:15 p.m.-8:05 a.m.

3 stops17h 50m

C$ 283

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 3/9

7:48 a.m.-5:06 p.m.

1 stop7h 18m

C$ 294

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

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 29 July 2025.
Check out reviews from past customers who have flown with United Airlines,WestJet, andAir 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.
United Airlines
7.4
Good
8,899 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

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
8,899 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

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.
WestJet
7.2
Good
2,973 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

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.
Air Canada
7.1
Good
9,822 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

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 are the cheapest airlines flying from Denver to Ottawa round-trip?

    WestJet, at C$ 491, was found to be the cheapest airline from Denver to Ottawa.Alternate airlines to your destination round-trip include Air Canada and United Airlines. WestJet is currently priced 27% 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$ 221. Users have also found prices from C$ 224 and C$ 294 on Air Canada and United Airlines, 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

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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 169AverageC$ 945FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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