Find flights
When to book
Airlines
FAQs

Cheap flights from Ottawa to Denver from C$ 353

YOW — DEN
16 Nov — 23 Nov1
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

Tue 24/117:05 a.m. -
1 stop15h 01m
Tue 8/1210:18 a.m. -
2 stops35h 02m
Deal found 15/10C$ 708
Fri 4/127:00 a.m. -
2 stops14h 51m
Thu 10/127:25 a.m. -
2 stops14h 15m
Deal found 15/10C$ 722
Sun 6/1212:50 p.m. -
2 stops21h 23m
Sat 12/127:10 a.m. -
3 stops15h 31m
Deal found 14/10C$ 762
Fri 27/1110:20 a.m. -
3 stops16h 34m
Fri 4/127:10 a.m. -
3 stops15h 31m
Deal found 12/10C$ 772
Tue 17/1110:30 a.m. -
2 stops23h 52m
Fri 27/1111:14 a.m. -
1 stop8h 53m
Deal found 12/10C$ 804

Find flight deals from Ottawa to Denver

Round-trip from

C$ 708

One-way from

C$ 353

Popular in

January

Cheapest in

April

Average price

C$ 902
24/11-8/12
  • 24/11-8/12
  • 3 total stops
  • 50h 03m total
  • Ottawa to Denver
Search Deals
10/12-31/12
  • 10/12-31/12
  • 2 total stops
  • 12h 48m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 149 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
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 Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 29/11

5:45 p.m.-8:39 a.m.

3 stops40h 54m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 409

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 27/11

8:30 a.m.-12:07 a.m.

2 stops17h 37m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 455

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Mon 30/11

9:15 a.m.-7:40 a.m.

1 stop24h 25m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 455

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 10/12

4:40 p.m.-8:13 a.m.

1 stop17h 33m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 460
Quickest round-trip

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 27/11

6:00 a.m.-10:35 a.m.

1 stop6h 35m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 466

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Mon 30/11

6:15 a.m.-9:48 p.m.

1 stop17h 33m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 623

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Mon 30/11

12:15 p.m.-11:04 p.m.

2 stops12h 49m

Denver Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 625

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 4/12

7:00 a.m.-7:51 p.m.

2 stops14h 51m

Denver Intl

Thu 10/12

7:25 a.m.-11:40 p.m.

2 stops14h 15m

C$ 722

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 6/12

8:00 a.m.-9:49 a.m.

1 stop27h 49m

Denver Intl

Sat 12/12

10:48 p.m.-11:40 p.m.

2 stops22h 52m

C$ 775

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 21/11

5:30 a.m.-5:10 p.m.

2 stops13h 40m

Denver Intl

Fri 27/11

6:10 a.m.-11:40 p.m.

2 stops15h 30m

C$ 841

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/10

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

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, April is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 796). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,283). 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$ 702 and C$ 1,052 in November.
The cheapest round-trip price found within the last 5 days was C$ 708 on Multiple Airlines (24 Nov-8 Dec).

Reviews of airlines servicing Denver

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
10,382 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
United Airlines
7.4
Good
10,382 reviews
United Airlines
7.4
Good
10,382 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
Air Canada
7.1
Good
11,777 reviews
United Airlines
7.4
Good
10,382 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

Related info for your journey

  • 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$ 657 on this airline. An additional option worth looking into is Air Canada, starting at C$ 751. You may be able to fly from Ottawa to Denver for 29% 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$ 796). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,283). 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
Black Hawk

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Ottawa to Denver

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 503AverageC$ 858FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 744AverageC$ 890FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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.