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Denver

$201+ 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Ottawa to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Ottawa to Denver Intl are usually found in September or October, booked 78 days in advance, depart on a Tuesday or Friday and return on a Wednesday

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 December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/114:15 pmYOW - DEN
2 stops42h 05mMultiple Airlines
Wed 1/74:25 pmDEN - YOW
1 stop23h 00mMultiple Airlines
Deal found 12/11$578
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/139:35 amYOW - DEN
1 stop25h 35mMultiple Airlines
Mon 12/1511:59 pmDEN - YOW
2 stops15h 26mMultiple Airlines
Deal found 12/10$703
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:45 amYOW - DEN
1 stop10h 28mUnited Airlines
Thu 1/16:00 amDEN - YOW
1 stop6h 27mUnited Airlines
Deal found 12/10$781
This Air Canada deal was found by Cheapflights users on 12/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:15 amYOW - DEN
1 stop15h 31mAir Canada
Thu 1/16:00 amDEN - YOW
2 stops8h 48mAir Canada
Deal found 12/11$785
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:20 pmYOW - DEN
2 stops23h 26mMultiple Airlines
Mon 12/1511:59 pmDEN - YOW
1 stop15h 14mMultiple Airlines
Deal found 12/10$801
This FlightHub deal was found by Cheapflights users on 12/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:00 amYOW - DEN
2 stops14h 58mWestJet
Mon 12/297:10 amDEN - YOW
2 stops15h 30mWestJet
Deal found 12/11$841
This Air Canada deal was found by Cheapflights users on 12/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:50 pmYOW - DEN
1 stop7h 05mAir Canada
Mon 12/296:00 amDEN - YOW
1 stop9h 18mAir Canada
Deal found 12/10$854
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:27 pmYOW - DEN
1 stop6h 48mUnited Airlines
Mon 12/297:50 amDEN - YOW
1 stop6h 37mUnited Airlines
Deal found 12/11$857
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:14 pmYOW - DEN
2 stops18h 51mUnited Airlines
Wed 1/75:42 pmDEN - YOW
2 stops21h 30mUnited Airlines
Deal found 12/11$861

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$306
(Kiwi.com)

One-way from

$201
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$597
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. 20% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
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

Wed 1/7

9:15 am-1:23 am

2 stops18h 08m

Denver Intl

Wed 1/14

4:27 pm-5:25 pm

1 stop22h 58m

$306

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 1/26

5:11 pm-6:58 am

2 stops15h 47m

Denver Intl

Thu 1/29

11:59 pm-11:54 pm

1 stop21h 55m

$595

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 1/26

5:40 am-8:44 pm

2 stops17h 04m

Denver Intl

Thu 1/29

7:10 am-12:42 am

2 stops15h 32m

$611

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 1/23

4:40 pm-10:36 am

2 stops19h 56m

Denver Intl

Mon 1/26

11:35 am-4:03 pm

2 stops26h 28m

$628

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 1/7

5:40 am-8:44 pm

2 stops17h 04m

Denver Intl

Wed 1/14

7:10 am-12:42 am

2 stops15h 32m

$630

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 1/26

2:50 pm-7:55 pm

1 stop7h 05m

Denver Intl

Thu 1/29

7:05 pm-6:43 am

1 stop9h 38m

$665

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 2/19

7:45 am-4:33 pm

1 stop10h 48m

Denver Intl

Tue 2/24

7:05 pm-6:43 am

1 stop9h 38m

$675

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 1/25

4:15 pm-12:19 pm

2 stops46h 04m

$201

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/29

5:40 am-9:01 am

3 stops29h 21m

$223

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 12/17

7:00 am-12:50 pm

2 stops31h 50m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 12 results
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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-Denver flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Denver. Price data was last updated on December 5, 2025.

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 78 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, April is the cheapest month in which you can book a flight from Ottawa to Denver (average of $185). Flying from Ottawa to Denver in January is currently the most expensive (average of $382). 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.

What is the cheapest time of day to fly from YOW to DEN?

Find hourly flight availability from Ottawa to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Ottawa to Denver in the morning. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the afternoon.

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 December 12, 2025.
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
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Air Canada
7.1
Good
10,516 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

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 $595, United Airlines can have you in Denver from Ottawa in 15h 47m. The distance between Ottawa and Denver is about 1513 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 48% 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, April is the cheapest month in which you can book a flight from Ottawa to Denver (average of $185). Flying from Ottawa to Denver in January is currently the most expensive (average of $382). 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
Black Hawk
Thornton
Westminster
Broomfield
Lakewood
Golden
Winter Park
Greeley
Lone Tree
Cripple Creek
Silverthorne
Central City
Frisco
Wheat Ridge
Manitou Springs
Fort Morgan
Brighton
Longmont
Idaho Springs
Parker

Browse thousands of different options on Cheapflights for your next trip

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$251Average$437FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$267Average$629FlexibilityNo cancel feeOn-time67%

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