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Cheap flights from Ottawa to Denver

YOW — DEN
16 May — 23 May1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ottawa to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Denver (DEN). 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 16 April 2026.

Round-trip from

C$ 571

One-way from

C$ 290

Popular in

January

Cheapest in

February

Average price

C$ 773
WestJet
  • WestJet
  • 18/7-26/7
  • 3 total stops
  • 43h 20m total
  • Ottawa to Denver
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30/5
  • 30/5
  • 3 total stops
  • 35h 10m total
  • Ottawa to Denver
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Highest demand for flights based on searches. 15% potential increase in price (C$ 171 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease (C$ 66 potential savings vs. average RT price).
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Average for round-trip flights in April 2026
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Best time to book a flight from Ottawa to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Ottawa 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 Ottawa to Denver

How far ahead should I book a flight from Ottawa to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Denver. Price data was last updated on 10 April 2026.

To ensure you get the cheapest price possible for a flight from Ottawa to Denver, you should look to book at least 78 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Ottawa to Denver?

Currently, February is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 435). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,216). 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 Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated 16 April 2026.
Read reviews from past customers who have flown United Airlines,WestJet, andAir Canada from Ottawa to Denver. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,595 reviews
Check prices

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,595 reviews
United Airlines
7.4
Good
9,595 reviews
Check prices

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,321 reviews
United Airlines
7.4
Good
9,595 reviews
Check prices

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,930 reviews
United Airlines
7.4
Good
9,595 reviews
Check prices

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Denver. 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 Ottawa to Denver?

    Airlines like WestJet and Delta fly from Ottawa to Denver in about 10h 18m. The time it takes to get you to your destination can typically vary by up to 8h 47m. The distance from Ottawa to Denver is about 2435 km. This flight may include one or multiple stops.

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

    Our cheapest airline available from Ottawa to Denver is United Airlines. Our recent data shows that you can find tickets from as low as C$ 303 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 368 and C$ 384 round-trip. You may be able to fly from Ottawa to Denver for 56% less than the average price by searching for these airlines.

  • Can I find deals for flights from Ottawa to Denver that include hotel bookings?

    Yes. In addition to deals on Ottawa to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Denver.

  • Can I find deals for business class flights from Ottawa to Denver?

    Yes. Cheapflights offers flight deals from Ottawa to Denver 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 Ottawa to Denver?

    Currently, February is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 435). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,216). 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 Denver?

Book flights to Denver if you plan to visit one of these locations
Golden
Thornton
Black Hawk

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Ottawa to Denver

Discover the top 3 airlines that operate flights from Ottawa to Denver. 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 16 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 303AverageC$ 569FlexibilityNo cancel feeOn-time69%
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WestJetCheapestC$ 368AverageC$ 481FlexibilityNo cancel feeOn-time60%
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Air CanadaCheapestC$ 384AverageC$ 668FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

Deals for Ottawa to Denver flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Denver?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Denver for you. Better yet — we are completely free to use.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Denver flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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