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Cheap flights from Ottawa to Denver from C$ 213

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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
28 Feb — 7 Mar1
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 29 January 2026.

Mon 9/24:20 p.m.
YOW
-
DEN
1 stop18h 00m
Multiple Airlines
Mon 2/36:21 p.m.
DEN
-
YOW
2 stops28h 18m
Multiple Airlines
Deal found 27/1C$ 565
Thu 16/49:30 a.m.
YOW
-
DEN
2 stops15h 21m
Multiple Airlines
Sun 19/49:25 a.m.
DEN
-
YOW
1 stop12h 33m
Multiple Airlines
Deal found 28/1C$ 619
Tue 10/210:35 a.m.
YOW
-
DEN
1 stop12h 11m
Multiple Airlines
Mon 2/36:21 p.m.
DEN
-
YOW
2 stops28h 18m
Multiple Airlines
Deal found 27/1C$ 622
Fri 3/49:30 a.m.
YOW
-
DEN
1 stop15h 39m
Multiple Airlines
Mon 6/411:59 p.m.
DEN
-
YOW
1 stop15h 14m
Multiple Airlines
Deal found 27/1C$ 646
Wed 4/24:20 p.m.
YOW
-
DEN
1 stop18h 10m
Multiple Airlines
Sun 1/39:27 a.m.
DEN
-
YOW
2 stops37h 12m
Multiple Airlines
Deal found 27/1C$ 665
Sat 7/24:20 p.m.
YOW
-
DEN
2 stops23h 16m
Multiple Airlines
Mon 2/36:00 a.m.
DEN
-
YOW
1 stop9h 05m
Multiple Airlines
Deal found 27/1C$ 677
Fri 6/23:05 p.m.
YOW
-
DEN
2 stops20h 55m
Multiple Airlines
Mon 2/36:00 a.m.
DEN
-
YOW
1 stop9h 05m
Multiple Airlines
Deal found 27/1C$ 728
Sun 8/24:15 p.m.
YOW
-
DEN
2 stops22h 04m
Multiple Airlines
Mon 2/36:00 a.m.
DEN
-
YOW
1 stop9h 05m
Multiple Airlines
Deal found 27/1C$ 747

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 29 January 2026.

Round-trip from

C$ 565

One-way from

C$ 213

Popular in

January

Cheapest in

September

Average price

C$ 1,170
9/2-2/3
  • 9/2-2/3
  • 3 total stops
  • 46h 18m total
  • Ottawa to Denver
Search Deals
6/3
  • 6/3
  • 1 total stop
  • 18h 00m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 303 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 29 January 2026.
Use the filters below to find and compare flights from Ottawa to Denver that are best for you.

Fly from

Ottawa

Fly to

Denver

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 9/2

4:20 p.m.-8:20 a.m.

1 stop18h 00m

Denver Intl

Mon 2/3

6:21 p.m.-12:39 a.m.

2 stops28h 18m

C$ 565

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 16/4

9:30 a.m.-10:51 p.m.

2 stops15h 21m

Denver Intl

Sun 19/4

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

1 stop12h 33m

C$ 619

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 3/4

9:30 a.m.-11:09 p.m.

1 stop15h 39m

Denver Intl

Mon 6/4

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

1 stop15h 14m

C$ 646

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 10/2

10:35 a.m.-8:46 p.m.

1 stop12h 11m

Denver Intl

Mon 2/3

6:00 a.m.-5:05 p.m.

1 stop9h 05m

C$ 737

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 8/2

4:15 p.m.-12:19 p.m.

2 stops22h 04m

Denver Intl

Mon 2/3

6:00 a.m.-5:05 p.m.

1 stop9h 05m

C$ 747

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 15/4

7:45 a.m.-5:50 p.m.

1 stop12h 05m

Denver Intl

Sun 19/4

7:05 p.m.-6:45 a.m.

1 stop9h 40m

C$ 772

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 13/3

6:20 a.m.-4:41 p.m.

1 stop12h 21m

Denver Intl

Fri 20/3

6:00 a.m.-9:18 p.m.

1 stop13h 18m

C$ 781

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 15/4

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

3 stops10h 51m

Denver Intl

Sun 19/4

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

1 stop6h 22m

C$ 781

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 23/2

5:40 a.m.-8:28 p.m.

2 stops16h 48m

Denver Intl

Thu 26/2

7:05 a.m.-12:39 a.m.

2 stops15h 34m

C$ 812

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 6/3

4:20 p.m.-8:20 a.m.

1 stop18h 00m

C$ 213

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/1

Showing 1-10 of 12 results
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 23 January 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, April is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 251). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 519). 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 29 January 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
9,215 reviews
Check prices

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

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
9,215 reviews
United Airlines
7.4
Good
9,215 reviews
Check prices

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

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
3,253 reviews
United Airlines
7.4
Good
9,215 reviews
Check prices

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

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
10,667 reviews
United Airlines
7.4
Good
9,215 reviews
Check prices

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

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.

  • 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$ 299 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 323 and C$ 423 round-trip. You may be able to fly from Ottawa to Denver for 57% 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, April is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 251). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 519). 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

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 29 January 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 299AverageC$ 554FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 323AverageC$ 459FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 423AverageC$ 650FlexibilityNo 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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