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Denver

$207+ Cheap flights from Ottawa (YOW) to Denver (DEN)

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
May 27 — Jun 31
Wed 5/27
Wed 6/3
1 adult, Economy
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Cheap flight deals from Ottawa to Denver

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 April 27, 2026.

This oojo deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:20 pm
YOW
-
DEN
1 stop24h 00m
WestJet
Sun 5/1712:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 4/23$337
This oojo deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/184:15 pm
YOW
-
DEN
1 stop21h 05m
WestJet
Wed 6/2412:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 4/25$364
This Trip.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/117:20 am
YOW
-
DEN
1 stop30h 00m
WestJet
Fri 6/1912:15 pm
DEN
-
YOW
1 stop25h 05m
WestJet
Deal found 4/23$379
This oojo deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:15 pm
YOW
-
DEN
2 stops19h 05m
WestJet
Sun 9/2712:15 pm
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 4/23$381

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 April 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$337
(oojo)

One-way from

$207
(oojo)

Popular in

January

Cheapest in

February

Average price

$562
Provider with most accurate pricing for Ottawa-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-Denver Intl flights.
Search Deals
From Ottawa to Denver Intl
Search Deals
One-way flight from Ottawa to Denver Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($34 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 2,558,603 searches. Data last updated April 27, 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

Thu 5/7

1:20 pm-11:20 am

1 stop24h 00m

Denver Intl

Sun 5/17

12:15 pm-12:30 pm

2 stops22h 15m

$337

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 9/23

4:15 pm-11:20 am

1 stop21h 05m

Denver Intl

Sun 9/27

12:15 pm-12:30 pm

2 stops22h 15m

$385

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 5/21

7:20 am-11:20 am

1 stop30h 00m

Denver Intl

Thu 5/28

12:15 pm-3:20 pm

1 stop25h 05m

$395

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 6/6

12:25 pm-8:15 pm

2 stops9h 50m

Denver Intl

Sat 6/13

6:05 am-5:35 pm

2 stops9h 30m

$432
Quickest round-trip

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 6/3

6:55 am-1:59 pm

2 stops9h 04m

Denver Intl

Sat 6/6

6:05 am-5:35 pm

2 stops9h 30m

$439

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 6/18

1:20 pm-11:20 am

1 stop24h 00m

Denver Intl

Wed 6/24

12:15 pm-5:35 am

1 stop15h 20m

$439
Cheapest one-way

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 6/5

6:15 pm-11:20 am

2 stops19h 05m

$207

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 6/11

12:25 pm-3:58 am

3 stops17h 33m

$208

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 6/4

1:20 pm-3:25 am

2 stops16h 05m

$210

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 6/15

7:20 am-3:58 am

3 stops22h 38m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Compare providers for flights from Ottawa to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Denver in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

The price you pay for your flight from Ottawa to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 77 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $316). Flying from Ottawa to Denver in January is currently the most expensive (average of $884). 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 April 27, 2026.
See what other customers who have flown with United Airlines and Air Canada from Ottawa to Denver have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,672 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

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
9,672 reviews
United Airlines
7.4
Good
9,672 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

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
10,975 reviews
United Airlines
7.4
Good
9,672 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

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.

  • How long is the flight from Ottawa to Denver?

    For as low as $337, WestJet can have you in Denver from Ottawa in 24h. The distance between Ottawa and Denver is about 1513 mi.

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

    Flying on United Airlines is currently your cheapest option to Denver, with prices starting at $251. Another option worth looking into is Air Canada, starting at $267 round trip. United Airlines is priced at 50% lower than the current average price of a flight leaving 3 months from now.

  • 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 $316). Flying from Ottawa to Denver in January is currently the most expensive (average of $884). 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Lakewood
Westminster
Broomfield
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Fort Morgan
Glendale
Evergreen

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.

Alternative routes for Ottawa to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Denver flights

Top 2 airlines flying from Ottawa to Denver

Discover the top 2 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 2,558,603 searches. Data last updated April 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$251Average$620FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$267Average$625FlexibilityNo cancel feeOn-time67%

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