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Cheap flights from Ottawa to Denver from C$ 306

YOW — DEN
29 Oct — 5 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

Mon 23/118:25 a.m. -
3 stops18h 29m
Tue 1/128:54 a.m. -
2 stops9h 15m
Deal found 29/9C$ 589
Tue 3/115:30 a.m. -
3 stops18h 02m
Tue 17/116:31 p.m. -
3 stops25h 44m
Deal found 26/9C$ 634
Wed 21/106:50 a.m. -
2 stops13h 02m
Fri 23/1012:59 a.m. -
2 stops14h 36m
Deal found 26/9C$ 647
Thu 12/117:00 a.m. -
2 stops17h 16m
Wed 18/117:00 a.m. -
2 stops13h 15m
Deal found 28/9C$ 728

Find flight deals from Ottawa to Denver

Round-trip from

C$ 589

One-way from

C$ 306

Popular in

January

Cheapest in

October

Average price

C$ 838
23/11-1/12
  • 23/11-1/12
  • 5 total stops
  • 27h 44m total
  • Ottawa to Denver
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9/11-31/12
  • 9/11-31/12
  • 2 total stops
  • 28h 54m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 137 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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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

Mon 9/11

7:00 a.m.-11:22 p.m.

3 stops42h 22m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 347

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 2/2

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

2 stops14h 00m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 360

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Wed 11/11

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

2 stops13h 40m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 360

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 1/11

8:00 a.m.-8:13 a.m.

1 stop26h 13m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 435

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 18/10

7:00 a.m.-11:08 p.m.

3 stops18h 08m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 483

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 12/11

7:45 a.m.-6:13 p.m.

1 stop12h 28m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 513

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 2/2

7:45 a.m.-6:13 p.m.

1 stop12h 28m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 528
Quickest round-trip

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 26/12

2:55 p.m.-8:27 p.m.

1 stop7h 32m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 533

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Wed 21/10

6:50 a.m.-5:52 p.m.

2 stops13h 02m

Denver Intl

Fri 23/10

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

2 stops14h 36m

C$ 647

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 3/11

7:05 a.m.-11:22 p.m.

2 stops18h 17m

Denver Intl

Tue 17/11

6:31 p.m.-10:15 p.m.

3 stops25h 44m

C$ 659

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/9

Showing 1-10 of 14 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, October is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 702). 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$ 547 and C$ 912 in November.
The cheapest round-trip price found within the last 5 days was C$ 589 on Multiple Airlines (23 Nov-1 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
10,251 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.7

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
10,251 reviews
United Airlines
7.4
Good
10,251 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.7

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
11,703 reviews
United Airlines
7.4
Good
10,251 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.7

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

  • How long is the flight from Ottawa to Denver?

    Airlines like Delta fly from Ottawa to Denver in about 13h 02m. 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$ 503 on this airline. An additional option worth looking into is Air Canada, starting at C$ 744. You may be able to fly from Ottawa to Denver for 46% 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, October is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 702). 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

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Top 2 airlines flying from Ottawa to Denver

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 503AverageC$ 858FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 744AverageC$ 879FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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