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Cheap flights from Ottawa to Denver from C$ 322

YOW — DEN
20 Nov — 27 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$ 703
Fri 4/127:00 a.m. -
2 stops14h 51m
Thu 10/127:25 a.m. -
2 stops14h 15m
Deal found 15/10C$ 717
Wed 2/125:30 a.m. -
3 stops20h 19m
Wed 9/1210:42 p.m. -
2 stops22h 58m
Deal found 18/10C$ 762

Find flight deals from Ottawa to Denver

Round-trip from

C$ 703

One-way from

C$ 322

Popular in

January

Cheapest in

April

Average price

C$ 941
24/11-8/12
  • 24/11-8/12
  • 3 total stops
  • 50h 03m total
  • Ottawa to Denver
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4/12-31/12
  • 4/12-31/12
  • 3 total stops
  • 32h 40m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 142 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 46 potential savings vs. average RT price).
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Average for round-trip flights in October 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

Sun 13/12

7:00 a.m.-11:47 p.m.

2 stops18h 47m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 335

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 4/12

8:00 a.m.-9:55 p.m.

2 stops39h 55m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 343

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 3/12

4:40 p.m.-3:48 p.m.

2 stops25h 08m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 350

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 1/11

3:30 p.m.-7:00 p.m.

2 stops29h 30m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 442
Quickest round-trip

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$ 444

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$ 451

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$ 457

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 7/11

5:30 a.m.-5:32 p.m.

2 stops14h 02m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 463

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 7/11

8:00 a.m.-8:24 a.m.

3 stops26h 24m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 494

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 24/11

7:05 a.m.-8:06 p.m.

1 stop15h 01m

Denver Intl

Tue 8/12

10:18 a.m.-11:20 p.m.

2 stops35h 02m

C$ 703

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/10

Showing 1-10 of 16 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$ 790). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,274). 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 below average for this route at the moment.

Ottawa to Denver flights typically cost between C$ 879 and C$ 1,011 in January.
The cheapest round-trip price found within the last 5 days was C$ 748 on Multiple Airlines (22 Jan-27 Jan).

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
10,391 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Entertainment

7.1

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
10,391 reviews
United Airlines
7.4
Good
10,391 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Entertainment

7.1

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
11,789 reviews
United Airlines
7.4
Good
10,391 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Entertainment

7.1

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$ 652 on this airline. An additional option worth looking into is Air Canada, starting at C$ 746. 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$ 790). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,274). 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?

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Black Hawk

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Top 2 airlines flying from Ottawa to Denver

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 652AverageC$ 857FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 746AverageC$ 888FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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