Find flights
When to book
Airlines
FAQs

Cheap flights from Ottawa to Denver from C$ 230

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
22 Mar — 29 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 20 February 2026.

Mon 30/34:15 p.m.
YOW
-
DEN
2 stops26h 22m
Multiple Airlines
Tue 14/411:59 p.m.
DEN
-
YOW
1 stop15h 14m
Multiple Airlines
Deal found 18/2C$ 433
Tue 31/310:35 a.m.
YOW
-
DEN
1 stop9h 30m
Multiple Airlines
Wed 15/43:07 p.m.
DEN
-
YOW
2 stops31h 18m
Multiple Airlines
Deal found 18/2C$ 467
Mon 30/34:15 p.m.
YOW
-
DEN
2 stops26h 22m
Multiple Airlines
Mon 13/45:53 p.m.
DEN
-
YOW
1 stop21h 20m
Multiple Airlines
Deal found 18/2C$ 468
Mon 30/39:35 a.m.
YOW
-
DEN
1 stop24h 43m
Multiple Airlines
Wed 15/411:59 p.m.
DEN
-
YOW
2 stops15h 26m
Multiple Airlines
Deal found 18/2C$ 481
Tue 31/310:35 a.m.
YOW
-
DEN
1 stop9h 30m
Multiple Airlines
Tue 14/411:59 p.m.
DEN
-
YOW
1 stop15h 14m
Multiple Airlines
Deal found 18/2C$ 485
Wed 8/47:00 a.m.
YOW
-
DEN
2 stops39h 10m
Multiple Airlines
Sat 18/411:59 p.m.
DEN
-
YOW
1 stop21h 59m
Multiple Airlines
Deal found 19/2C$ 486
Tue 31/310:35 a.m.
YOW
-
DEN
1 stop9h 30m
Multiple Airlines
Mon 13/45:53 p.m.
DEN
-
YOW
1 stop21h 20m
Multiple Airlines
Deal found 18/2C$ 520
Sat 4/44:15 p.m.
YOW
-
DEN
2 stops17h 54m
Multiple Airlines
Sat 11/46:00 a.m.
DEN
-
YOW
1 stop15h 58m
Multiple Airlines
Deal found 18/2C$ 530
Wed 1/47:00 a.m.
YOW
-
DEN
2 stops27h 09m
Multiple Airlines
Tue 14/411:59 p.m.
DEN
-
YOW
1 stop15h 14m
Multiple Airlines
Deal found 18/2C$ 535

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 20 February 2026.

Round-trip from

C$ 433

One-way from

C$ 230

Popular in

January

Cheapest in

September

Average price

C$ 805
30/3-14/4
  • 30/3-14/4
  • 3 total stops
  • 41h 36m total
  • Ottawa to Denver
Search Deals
22/4
  • 22/4
  • 2 total stops
  • 17h 29m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 309 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 20 February 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

Tue 31/3

4:15 p.m.-1:07 p.m.

2 stops22h 52m

Denver Intl

Tue 14/4

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

1 stop15h 14m

C$ 433

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 31/3

10:35 a.m.-6:05 p.m.

1 stop9h 30m

Denver Intl

Wed 15/4

3:07 p.m.-12:25 a.m.

2 stops31h 18m

C$ 467

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 8/4

7:00 a.m.-8:10 p.m.

2 stops39h 10m

Denver Intl

Sat 18/4

11:59 p.m.-11:58 p.m.

1 stop21h 59m

C$ 486

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 31/3

10:35 a.m.-6:05 p.m.

1 stop9h 30m

Denver Intl

Mon 13/4

5:53 p.m.-5:13 p.m.

1 stop21h 20m

C$ 520

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 30/3

9:35 a.m.-8:18 a.m.

1 stop24h 43m

Denver Intl

Mon 13/4

5:53 p.m.-5:13 p.m.

1 stop21h 20m

C$ 531

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 1/4

7:00 a.m.-8:09 a.m.

2 stops27h 09m

Denver Intl

Tue 14/4

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

1 stop15h 14m

C$ 535

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 6/4

7:00 a.m.-1:07 p.m.

2 stops32h 07m

Denver Intl

Mon 13/4

10:40 p.m.-9:30 p.m.

1 stop20h 50m

C$ 554

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 12/4

6:45 a.m.-9:43 a.m.

2 stops28h 58m

Denver Intl

Fri 17/4

10:40 p.m.-9:30 p.m.

1 stop20h 50m

C$ 563

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 30/3

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

1 stop18h 00m

Denver Intl

Wed 15/4

10:40 p.m.-9:30 p.m.

1 stop20h 50m

C$ 564

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 4/4

10:35 a.m.-8:58 a.m.

1 stop24h 23m

Denver Intl

Sat 11/4

11:59 p.m.-11:58 p.m.

1 stop21h 59m

C$ 578

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Showing 1-10 of 18 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 18 February 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$ 253). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 523). 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 20 February 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
9,325 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

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
9,325 reviews
United Airlines
7.4
Good
9,325 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

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
3,270 reviews
United Airlines
7.4
Good
9,325 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

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
10,732 reviews
United Airlines
7.4
Good
9,325 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

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$ 302 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 326 and C$ 392 round-trip. You may be able to fly from Ottawa to Denver for 58% 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$ 253). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 523). 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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 302AverageC$ 541FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 326AverageC$ 462FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 392AverageC$ 652FlexibilityNo 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!

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.