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Cheap flights from Ottawa to Denver from C$ 347

YOW — DEN
9 Dec — 16 Dec1
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

Sun 6/1212:50 p.m. -
2 stops21h 23m
Sun 13/128:16 p.m. -
3 stops21h 52m
Deal found 8/11C$ 830
Thu 24/124:42 p.m. -
1 stop7h 40m
Thu 31/1211:59 p.m. -
1 stop13h 08m
Deal found 9/11C$ 962
Mon 7/122:00 p.m. -
1 stop7h 39m
Wed 9/129:55 a.m. -
1 stop10h 01m
Deal found 6/11C$ 965
Sun 6/129:45 a.m. -
1 stop8h 33m
Sun 13/125:00 a.m. -
2 stops14h 56m
Deal found 8/11C$ 1,005
Mon 21/122:00 p.m. -
2 stops21h 01m
Mon 28/126:00 a.m. -
1 stop13h 56m
Deal found 6/11C$ 1,016
Sat 21/115:30 a.m. -
2 stops16h 36m
Sun 22/113:52 p.m. -
1 stop23h 30m
Deal found 5/11C$ 1,060

Find flight deals from Ottawa to Denver

Round-trip from

C$ 710

One-way from

C$ 347

Popular in

January

Cheapest in

April

Average price

C$ 934
4/2-8/2
  • 4/2-8/2
  • 3 total stops
  • 40h 59m total
  • Ottawa to Denver
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15/3-31/12
  • 15/3-31/12
  • 2 total stops
  • 38h 38m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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

Sat 1/5

6:15 p.m.-11:20 a.m.

2 stops19h 05m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 480

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 29/11

6:55 p.m.-3:50 p.m.

2 stops46h 55m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 490

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 20/12

10:20 a.m.-5:38 p.m.

2 stops9h 18m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 492

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 19/3

10:15 a.m.-1:56 p.m.

2 stops29h 41m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 494
Quickest round-trip

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 1/5

8:00 a.m.-10:17 a.m.

Nonstop4h 17m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 516

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 30/4

8:00 a.m.-10:17 a.m.

Nonstop4h 17m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 522

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 24/12

9:45 a.m.-11:30 p.m.

2 stops15h 45m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 522

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 22/12

2:00 p.m.-12:15 a.m.

1 stop12h 15m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 525

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Wed 17/3

2:55 p.m.-8:26 p.m.

1 stop7h 31m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 531

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sat 20/3

2:55 p.m.-8:26 p.m.

1 stop7h 31m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 531

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/11

Showing 1-10 of 20 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$ 793). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,278). 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.

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
10,473 reviews
Check prices

Overall

7.3

Comfort

7.3

Crew

8.1

Food

6.7

Entertainment

7.1

Boarding

7.7

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
10,473 reviews
United Airlines
7.3
Good
10,473 reviews
Check prices

Overall

7.3

Comfort

7.3

Crew

8.1

Food

6.7

Entertainment

7.1

Boarding

7.7

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
11,880 reviews
United Airlines
7.3
Good
10,473 reviews
Check prices

Overall

7.3

Comfort

7.3

Crew

8.1

Food

6.7

Entertainment

7.1

Boarding

7.7

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 United Airlines fly from Ottawa to Denver in about 12h 15m. 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$ 790 on this airline. An additional option worth looking into is Air Canada, starting at C$ 792. You may be able to fly from Ottawa to Denver for 15% 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$ 793). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,278). 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$ 790AverageC$ 860FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 792AverageC$ 908FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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