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Cheap flights from Ottawa to Denver from C$ 377

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
24 Jun — 1 Jul1
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 25 May 2026.

Thu 18/66:15 p.m.
YOW
-
DEN
2 stops19h 05m
WestJet
Thu 25/612:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 20/5C$ 521
Thu 9/71:20 p.m.
YOW
-
DEN
1 stop24h 00m
WestJet
Tue 14/712:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 21/5C$ 591
Tue 7/78:15 p.m.
YOW
-
DEN
1 stop17h 05m
WestJet
Tue 28/712:15 p.m.
DEN
-
YOW
1 stop15h 20m
WestJet
Deal found 20/5C$ 612
Sun 23/87:20 a.m.
YOW
-
DEN
1 stop30h 00m
WestJet
Mon 31/812:15 p.m.
DEN
-
YOW
1 stop15h 20m
WestJet
Deal found 20/5C$ 627
Fri 10/71:20 p.m.
YOW
-
DEN
1 stop24h 00m
WestJet
Mon 13/712:15 p.m.
DEN
-
YOW
1 stop15h 20m
WestJet
Deal found 20/5C$ 673
Fri 21/88:15 p.m.
YOW
-
DEN
1 stop17h 05m
WestJet
Tue 25/812:15 p.m.
DEN
-
YOW
1 stop10h 25m
WestJet
Deal found 21/5C$ 705

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 25 May 2026.

Round-trip from

C$ 521

One-way from

C$ 377

Popular in

January

Cheapest in

February

Average price

C$ 913
WestJet
  • WestJet
  • 18/6-25/6
  • 4 total stops
  • 41h 20m total
  • Ottawa to Denver
Search Deals
28/7
  • 28/7
  • 2 total stops
  • 19h 05m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 169 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 May 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 25 May 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

Wed 5/8

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

1 stop21h 05m

Denver Intl

Tue 11/8

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

2 stops22h 15m

C$ 591

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 7/7

8:15 p.m.-11:20 a.m.

1 stop17h 05m

Denver Intl

Tue 28/7

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

1 stop15h 20m

C$ 612

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 23/8

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

1 stop30h 00m

Denver Intl

Mon 31/8

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

2 stops27h 20m

C$ 634

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 10/7

1:20 p.m.-11:20 a.m.

1 stop24h 00m

Denver Intl

Mon 13/7

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

1 stop15h 20m

C$ 673

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 9/7

8:15 p.m.-11:20 a.m.

1 stop17h 05m

Denver Intl

Tue 14/7

12:15 p.m.-7:20 p.m.

1 stop29h 05m

C$ 739
Quickest round-trip

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 21/8

6:55 a.m.-10:05 p.m.

2 stops17h 10m

Denver Intl

Mon 24/8

12:45 a.m.-5:35 p.m.

2 stops14h 50m

C$ 808
Cheapest one-way

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 28/7

4:00 p.m.-9:05 a.m.

2 stops19h 05m

C$ 377

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 14/7

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

2 stops14h 00m

C$ 392

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 28/7

6:00 a.m.-11:20 a.m.

1 stop31h 20m

C$ 431
Quickest one-way

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 8/6

2:40 p.m.-7:00 p.m.

1 stop6h 20m

C$ 471

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/5

Showing 1-10 of 12 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?

To ensure you get the cheapest price possible for a flight from Ottawa to Denver, you should look to book at least 38 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$ 437). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,221). 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 25 May 2026.
Read reviews from past customers who have flown United Airlines and Air 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
9,747 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
9,747 reviews
United Airlines
7.4
Good
9,747 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
11,083 reviews
United Airlines
7.4
Good
9,747 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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 fly from Ottawa to Denver in about 21h 05m. The time it takes to get you to your destination can typically vary by up to . The distance from Ottawa to Denver is about 2435 km.

  • 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$ 305 on this airline. An additional option worth looking into is Air Canada, starting at C$ 395. 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$ 437). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,221). 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 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 629,999 searches. Data last updated 25 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 305AverageC$ 559FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 395AverageC$ 740FlexibilityNo 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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