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Cheap flights from Ottawa to Denver from C$ 261

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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
29 Apr — 6 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Denver

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Denver
Explore the most affordable flight options available from Ottawa to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 March 2026.

Thu 27/87:20 a.m.
YOW
-
DEN
1 stop30h 00m
WestJet
Tue 1/912:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 29/3C$ 682
Mon 6/49:35 a.m.
YOW
-
DEN
2 stops28h 34m
Multiple Airlines
Thu 16/46:30 a.m.
DEN
-
YOW
1 stop13h 00m
Multiple Airlines
Deal found 25/3C$ 686
Fri 24/44:20 p.m.
YOW
-
DEN
1 stop32h 39m
Multiple Airlines
Fri 1/59:00 p.m.
DEN
-
YOW
2 stops18h 35m
Multiple Airlines
Deal found 25/3C$ 700
Tue 3/115:20 p.m.
YOW
-
DEN
1 stop7h 43m
United Airlines
Thu 5/118:17 a.m.
DEN
-
YOW
1 stop11h 17m
United Airlines
Deal found 27/3C$ 740
Sat 2/54:15 p.m.
YOW
-
DEN
1 stop21h 05m
WestJet
Wed 6/512:15 p.m.
DEN
-
YOW
1 stop15h 20m
WestJet
Deal found 29/3C$ 767
Fri 3/710:44 a.m.
YOW
-
DEN
1 stop6h 24m
United Airlines
Fri 10/77:42 a.m.
DEN
-
YOW
2 stops14h 12m
United Airlines
Deal found 29/3C$ 771
Thu 23/47:30 p.m.
YOW
-
DEN
1 stop7h 14m
United Airlines
Fri 1/511:59 p.m.
DEN
-
YOW
1 stop8h 04m
United Airlines
Deal found 28/3C$ 772

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 30 March 2026.

Round-trip from

C$ 657

One-way from

C$ 261

Popular in

January

Cheapest in

February

Average price

C$ 813
23/4-1/5
  • 23/4-1/5
  • 3 total stops
  • 50h 01m total
  • Ottawa to Denver
Search Deals
5/6
  • 5/6
  • 3 total stops
  • 23h 13m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 173 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 67 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 Ottawa to Denver 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 30 March 2026.
Use the filters below to find and compare flights from Ottawa to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 2/5

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

1 stop21h 05m

Denver Intl

Wed 6/5

12:15 p.m.-5:35 a.m.

1 stop15h 20m

C$ 767

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 3/7

3:10 p.m.-9:18 p.m.

1 stop8h 08m

Denver Intl

Fri 10/7

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

1 stop6h 04m

C$ 771

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 23/4

7:30 p.m.-12:44 a.m.

1 stop7h 14m

Denver Intl

Fri 1/5

11:59 p.m.-10:03 a.m.

1 stop8h 04m

C$ 771

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 18/6

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

1 stop7h 00m

Denver Intl

Wed 24/6

1:41 p.m.-10:05 p.m.

1 stop6h 24m

C$ 771

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 6/8

10:44 a.m.-11:48 p.m.

1 stop15h 04m

Denver Intl

Tue 11/8

7:13 p.m.-9:56 a.m.

1 stop12h 43m

C$ 772
Quickest round-trip

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 2/5

5:25 p.m.-10:19 p.m.

1 stop6h 54m

Denver Intl

Wed 6/5

6:00 a.m.-2:22 p.m.

1 stop6h 22m

C$ 772

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 23/7

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

1 stop6h 06m

Denver Intl

Thu 23/7

1:53 p.m.-11:54 p.m.

1 stop8h 01m

C$ 834

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 4/5

10:00 a.m.-10:15 p.m.

1 stop14h 15m

Denver Intl

Fri 8/5

11:59 p.m.-9:11 a.m.

1 stop7h 12m

C$ 839

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 7/7

10:44 a.m.-4:31 p.m.

1 stop7h 47m

Denver Intl

Tue 28/7

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

2 stops10h 20m

C$ 839
Cheapest one-way

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 5/6

12:25 p.m.-9:38 a.m.

3 stops23h 13m

C$ 261

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/3

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 13 March 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, September is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 303). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 531). 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.

How much does it cost to fly round-trip from Ottawa to Denver?

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 30 March 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
9,514 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

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
9,514 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

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
3,307 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

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
10,862 reviews
United Airlines
7.4
Good
9,514 reviews
Check prices

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

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 United Airlines fly from Ottawa to Denver in about 8h 08m. The time it takes to get you to your destination can typically vary by up to 12h 57m. 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$ 306 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 331 and C$ 388 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, September is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 303). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 531). 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 30 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 306AverageC$ 573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 331AverageC$ 469FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 388AverageC$ 702FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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