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Cheap flights from Ottawa to Denver from C$ 309

YOW — DEN
22 Nov — 29 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

Thu 10/123:15 p.m. -
2 stops41h 14m
Thu 31/1211:57 p.m. -
1 stop15h 42m
Deal found 21/10C$ 747
Wed 2/125:30 a.m. -
3 stops20h 19m
Wed 9/1210:42 p.m. -
2 stops22h 58m
Deal found 18/10C$ 760
Mon 23/115:30 a.m. -
2 stops13h 43m
Fri 27/116:10 a.m. -
2 stops15h 30m
Deal found 21/10C$ 829
Sat 19/123:15 p.m. -
2 stops32h 33m
Tue 26/110:41 a.m. -
1 stop11h 26m
Deal found 22/10C$ 865
Mon 23/116:15 a.m. -
1 stop10h 35m
Fri 27/119:49 a.m. -
1 stop10h 07m
Deal found 20/10C$ 962

Find flight deals from Ottawa to Denver

Round-trip from

C$ 746

One-way from

C$ 309

Popular in

January

Cheapest in

April

Average price

C$ 938
22/1-27/1
  • 22/1-27/1
  • 3 total stops
  • 44h 52m total
  • Ottawa to Denver
Search Deals
3/12-31/12
  • 3/12-31/12
  • 2 total stops
  • 42h 10m 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).
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 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

Thu 3/12

4:40 p.m.-8:50 a.m.

2 stops42h 10m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 309

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$ 334

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$ 428

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$ 440
Quickest round-trip

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 5/12

5:30 a.m.-5:14 p.m.

2 stops13h 44m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 443

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 7/2

1:45 p.m.-8:28 a.m.

2 stops20h 43m

Denver Intl

Wed 10/2

6:19 a.m.-4:44 p.m.

1 stop8h 25m

C$ 822

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Mon 23/11

5:30 a.m.-5:13 p.m.

2 stops13h 43m

Denver Intl

Fri 27/11

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

2 stops15h 30m

C$ 829

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Wed 2/12

8:00 a.m.-9:30 p.m.

1 stop15h 30m

Denver Intl

Wed 9/12

10:42 p.m.-11:40 p.m.

2 stops22h 58m

C$ 930

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 23/1

6:15 a.m.-12:45 p.m.

1 stop8h 30m

Denver Intl

Sat 30/1

10:20 a.m.-7:27 p.m.

1 stop7h 07m

C$ 962

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 20/3

4:36 p.m.-11:51 p.m.

1 stop9h 15m

Denver Intl

Sat 27/3

6:00 a.m.-2:18 p.m.

1 stop6h 18m

C$ 962

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/10

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, April is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 788). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,270). 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$ 876 and C$ 1,008 in January.
The cheapest round-trip price found within the last 5 days was C$ 746 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
7.3
Good
10,415 reviews
Check prices

Boarding

7.7

Crew

8.1

Overall

7.3

Comfort

7.3

Entertainment

7.1

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
7.3
Good
10,415 reviews
United Airlines
7.3
Good
10,415 reviews
Check prices

Boarding

7.7

Crew

8.1

Overall

7.3

Comfort

7.3

Entertainment

7.1

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
11,795 reviews
United Airlines
7.3
Good
10,415 reviews
Check prices

Boarding

7.7

Crew

8.1

Overall

7.3

Comfort

7.3

Entertainment

7.1

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 43m. 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$ 651 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 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$ 788). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,270). 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$ 651AverageC$ 855FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 744AverageC$ 886FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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