Find flights
When to book
Airlines
FAQs

Cheap flights from Ottawa to Denver from C$ 290

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
29 Aug — 5 Sep1
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 30 July 2026.

Sat 29/86:15 p.m.
YOW
-
DEN
2 stops19h 05m
WestJet
Tue 1/912:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 28/7C$ 575
Mon 24/88:15 p.m.
YOW
-
DEN
1 stop17h 05m
Multiple Airlines
Mon 31/88:31 a.m.
DEN
-
YOW
2 stops13h 49m
Multiple Airlines
Deal found 27/7C$ 577
Wed 26/81:20 p.m.
YOW
-
DEN
1 stop24h 00m
WestJet
Mon 31/812:15 p.m.
DEN
-
YOW
2 stops22h 15m
WestJet
Deal found 30/7C$ 589
Fri 4/94:15 p.m.
YOW
-
DEN
1 stop21h 05m
WestJet
Mon 7/912:15 p.m.
DEN
-
YOW
1 stop25h 05m
WestJet
Deal found 26/7C$ 607
Sat 12/97:00 a.m.
YOW
-
DEN
1 stop10h 37m
Multiple Airlines
Sat 26/96:45 p.m.
DEN
-
YOW
2 stops32h 50m
Multiple Airlines
Deal found 29/7C$ 648
Wed 26/88:15 p.m.
YOW
-
DEN
1 stop17h 05m
Multiple Airlines
Mon 31/88:31 a.m.
DEN
-
YOW
2 stops33h 31m
Multiple Airlines
Deal found 28/7C$ 651
Thu 10/91:20 p.m.
YOW
-
DEN
2 stops25h 31m
Multiple Airlines
Sun 13/97:12 p.m.
DEN
-
YOW
1 stop26h 36m
Multiple Airlines
Deal found 30/7C$ 667
Thu 20/86:15 p.m.
YOW
-
DEN
2 stops43h 05m
WestJet
Tue 25/812:15 p.m.
DEN
-
YOW
1 stop27h 00m
WestJet
Deal found 29/7C$ 672
Sun 13/92:00 p.m.
YOW
-
DEN
2 stops23h 20m
Multiple Airlines
Sun 20/97:12 p.m.
DEN
-
YOW
1 stop26h 36m
Multiple Airlines
Deal found 30/7C$ 676

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 30 July 2026.

Round-trip from

C$ 575

One-way from

C$ 290

Popular in

January

Cheapest in

September

Average price

C$ 884
WestJet
  • WestJet
  • 29/8-1/9
  • 4 total stops
  • 41h 20m total
  • Ottawa to Denver
Search Deals
23/10
  • 23/10
  • 3 total stops
  • 17h 27m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 225 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 30 July 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

Fri 4/9

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

1 stop21h 05m

Denver Intl

Mon 7/9

12:15 p.m.-3:20 p.m.

1 stop25h 05m

C$ 607

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Wed 9/9

6:55 a.m.-5:21 p.m.

2 stops12h 26m

Denver Intl

Wed 16/9

11:10 a.m.-12:20 a.m.

2 stops11h 10m

C$ 703

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 24/8

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

1 stop17h 05m

Denver Intl

Mon 31/8

10:43 a.m.-11:48 p.m.

1 stop11h 05m

C$ 760

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 24/8

6:55 a.m.-11:20 a.m.

2 stops30h 25m

Denver Intl

Mon 31/8

12:15 p.m.-11:35 a.m.

2 stops21h 20m

C$ 760

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 18/8

6:55 a.m.-11:02 p.m.

2 stops18h 07m

Denver Intl

Fri 28/8

12:59 a.m.-5:35 p.m.

2 stops14h 36m

C$ 766

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 25/8

6:55 a.m.-7:52 p.m.

2 stops14h 57m

Denver Intl

Fri 28/8

12:59 a.m.-5:35 p.m.

2 stops14h 36m

C$ 766

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/10

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

1 stop24h 00m

Denver Intl

Mon 5/10

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

1 stop29h 05m

C$ 772
Quickest round-trip

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 12/9

6:00 a.m.-10:31 a.m.

1 stop6h 31m

Denver Intl

Sat 26/9

9:40 a.m.-7:45 p.m.

1 stop8h 05m

C$ 846
Cheapest one-way

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 23/10

12:25 p.m.-3:52 a.m.

3 stops17h 27m

C$ 290

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 11/9

6:25 p.m.-5:16 p.m.

2 stops24h 51m

C$ 332

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 17 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

What is the cheapest month to book a flight from Ottawa to Denver?

Currently, September is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 410). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,276). 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?

Airfare is typical for this route at the moment.

Ottawa to Denver flights typically cost between C$ 469 and C$ 938 in August.
The cheapest round-trip price found within the last 5 days was C$ 575 on WestJet (29 Aug-1 Sep).

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 30 July 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
10,046 reviews
Check prices

Entertainment

7.1

Comfort

7.3

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
10,046 reviews
United Airlines
7.4
Good
10,046 reviews
Check prices

Entertainment

7.1

Comfort

7.3

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
11,406 reviews
United Airlines
7.4
Good
10,046 reviews
Check prices

Entertainment

7.1

Comfort

7.3

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?

    Airlines like Delta and WestJet fly from Ottawa to Denver in about 12h 26m. The time it takes to get you to your destination can typically vary by up to 17h 59m. 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$ 310 on this airline. An additional option worth looking into is Air Canada, starting at C$ 439. You may be able to fly from Ottawa to Denver for 62% 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, September is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 410). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,276). 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
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 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 30 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 310AverageC$ 554FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 439AverageC$ 814FlexibilityNo 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.