Find flights
When to book
Airlines
FAQs

Cheap flights from Ottawa to Denver from C$ 283

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
22 May — 29 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 22 April 2026.

Thu 18/64:15 p.m.
YOW
-
DEN
1 stop21h 05m
WestJet
Wed 24/612:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 22/4C$ 499
Wed 23/96:15 p.m.
YOW
-
DEN
2 stops19h 05m
WestJet
Sun 27/912:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 18/4C$ 557
Thu 9/71:20 p.m.
YOW
-
DEN
1 stop24h 00m
WestJet
Thu 23/712:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 18/4C$ 574
Wed 3/66:15 p.m.
YOW
-
DEN
2 stops19h 05m
WestJet
Sat 6/612:15 p.m.
DEN
-
YOW
1 stop15h 20m
WestJet
Deal found 21/4C$ 579
Sat 6/612:25 p.m.
YOW
-
DEN
2 stops9h 50m
Delta
Sat 13/66:05 a.m.
DEN
-
YOW
2 stops9h 30m
Delta
Deal found 22/4C$ 590
Wed 3/66:55 a.m.
YOW
-
DEN
2 stops9h 04m
Delta
Sat 6/66:05 a.m.
DEN
-
YOW
2 stops9h 30m
Delta
Deal found 21/4C$ 601
Sun 24/57:20 a.m.
YOW
-
DEN
1 stop30h 00m
Multiple Airlines
Mon 22/610:29 p.m.
DEN
-
YOW
2 stops29h 06m
Multiple Airlines
Deal found 21/4C$ 624
Tue 2/67:20 a.m.
YOW
-
DEN
1 stop30h 00m
WestJet
Thu 4/612:15 p.m.
DEN
-
YOW
1 stop15h 20m
WestJet
Deal found 19/4C$ 645

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 22 April 2026.

Round-trip from

C$ 499

One-way from

C$ 283

Popular in

January

Cheapest in

February

Average price

C$ 768
WestJet
  • WestJet
  • 18/6-24/6
  • 3 total stops
  • 43h 20m total
  • Ottawa to Denver
Search Deals
WestJet
  • WestJet
  • 4/6
  • 2 total stops
  • 19h 05m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 167 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 22 April 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 6/6

12:25 p.m.-8:15 p.m.

2 stops9h 50m

Denver Intl

Sat 13/6

6:05 a.m.-5:35 p.m.

2 stops9h 30m

C$ 590

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 3/6

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

1 stop21h 05m

Denver Intl

Sat 6/6

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

1 stop15h 20m

C$ 601

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 5/6

7:20 a.m.-11:10 p.m.

3 stops17h 50m

Denver Intl

Fri 12/6

7:50 p.m.-5:35 a.m.

3 stops31h 45m

C$ 717

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 6/6

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

1 stop21h 05m

Denver Intl

Sat 13/6

10:29 p.m.-5:35 a.m.

2 stops29h 06m

C$ 718

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 18/6

6:15 p.m.-11:20 a.m.

2 stops43h 05m

Denver Intl

Wed 24/6

12:15 p.m.-12:30 p.m.

2 stops22h 15m

C$ 732

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 20/7

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

1 stop8h 08m

Denver Intl

Mon 20/7

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

1 stop7h 12m

C$ 799

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 11/8

6:00 a.m.-12:21 p.m.

1 stop8h 21m

Denver Intl

Tue 11/8

3:40 p.m.-9:56 a.m.

1 stop16h 16m

C$ 799
Quickest round-trip

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 4/6

6:25 a.m.-12:45 p.m.

1 stop8h 20m

Denver Intl

Sun 7/6

6:00 a.m.-1:59 p.m.

1 stop5h 59m

C$ 806

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 18/6

5:50 p.m.-11:28 p.m.

1 stop7h 38m

Denver Intl

Wed 24/6

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

1 stop8h 04m

C$ 806

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 13/5

5:50 p.m.-11:59 p.m.

1 stop8h 09m

Denver Intl

Sat 16/5

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

1 stop8h 04m

C$ 806

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/4

Showing 1-10 of 20 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 17 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$ 432). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,207). 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 22 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
9,625 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

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
9,625 reviews
United Airlines
7.4
Good
9,625 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

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
3,324 reviews
United Airlines
7.4
Good
9,625 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

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
10,952 reviews
United Airlines
7.4
Good
9,625 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

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 9h 50m. The time it takes to get you to your destination can typically vary by up to 20h 35m. 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$ 301 on this airline. Additional options worth looking into are Air Canada and WestJet, starting at C$ 381 and C$ 395 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$ 432). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,207). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 22 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 301AverageC$ 560FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 381AverageC$ 660FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 395AverageC$ 471FlexibilityNo cancel feeOn-time60%
Search WestJet 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.