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Cheap flights from Ottawa to Denver from C$ 273

YOW — DEN
23 Sep — 30 Sep1
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 1/104:15 p.m. -
1 stop21h 05m
Mon 5/1012:15 p.m. -
1 stop15h 20m
Deal found 20/8C$ 492
Sat 26/91:20 p.m. -
1 stop24h 00m
Sun 4/1012:15 p.m. -
1 stop25h 05m
Deal found 20/8C$ 500
Thu 1/106:15 p.m. -
2 stops19h 05m
Sun 4/1012:15 p.m. -
2 stops22h 15m
Deal found 20/8C$ 545
Thu 1/108:15 p.m. -
1 stop17h 05m
Thu 29/107:00 a.m. -
2 stops16h 00m
Deal found 20/8C$ 552
Fri 2/106:15 p.m. -
2 stops43h 05m
Mon 5/1012:15 p.m. -
1 stop27h 00m
Deal found 20/8C$ 555
Sat 26/92:00 p.m. -
3 stops23h 20m
Sun 4/1012:15 p.m. -
1 stop29h 05m
Deal found 20/8C$ 580
Fri 2/106:55 a.m. -
2 stops12h 26m
Tue 6/106:20 a.m. -
2 stops9h 15m
Deal found 23/8C$ 589
Fri 18/97:00 a.m. -
1 stop14h 37m
Fri 25/97:00 a.m. -
2 stops20h 35m
Deal found 21/8C$ 611

Find flight deals from Ottawa to Denver

Round-trip from

C$ 492

One-way from

C$ 273

Popular in

January

Cheapest in

October

Average price

C$ 971
WestJet
  • WestJet
  • 1/10-4/10
  • 2 total stops
  • 59h 05m total
  • Ottawa to Denver
Search Deals
4/10
  • 4/10
  • 3 total stops
  • 23h 18m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 155 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 26/9

1:20 p.m.-11:20 a.m.

1 stop24h 00m

Denver Intl

Sun 4/10

12:15 p.m.-3:20 p.m.

1 stop25h 05m

C$ 500

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 1/10

8:15 p.m.-11:20 a.m.

1 stop17h 05m

Denver Intl

Thu 29/10

7:00 a.m.-1:00 a.m.

2 stops16h 00m

C$ 552
Quickest round-trip

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 2/10

6:55 a.m.-5:21 p.m.

2 stops12h 26m

Denver Intl

Tue 6/10

6:20 a.m.-5:35 p.m.

2 stops9h 15m

C$ 589

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 18/9

7:00 a.m.-7:37 p.m.

1 stop14h 37m

Denver Intl

Fri 25/9

7:00 a.m.-5:35 a.m.

2 stops20h 35m

C$ 611

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Mon 7/9

7:20 a.m.-9:05 a.m.

2 stops27h 45m

Denver Intl

Fri 11/9

12:15 p.m.-5:35 a.m.

1 stop15h 20m

C$ 659

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 15/9

6:55 a.m.-7:05 p.m.

2 stops14h 10m

Denver Intl

Fri 18/9

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

2 stops14h 36m

C$ 671

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 1/10

12:25 p.m.-11:35 p.m.

2 stops13h 10m

Denver Intl

Thu 29/10

10:41 a.m.-12:44 a.m.

2 stops12h 03m

C$ 713

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 18/9

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

2 stops43h 05m

Denver Intl

Fri 25/9

12:15 p.m.-11:35 a.m.

2 stops21h 20m

C$ 768

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Tue 3/11

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

1 stop14h 00m

Denver Intl

Tue 17/11

7:02 p.m.-4:44 p.m.

1 stop19h 42m

C$ 811

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 20/11

6:15 a.m.-5:49 p.m.

1 stop13h 34m

Denver Intl

Mon 23/11

11:59 p.m.-3:07 p.m.

1 stop13h 08m

C$ 933

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/8

Showing 1-10 of 18 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$ 457). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,247). 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$ 622 and C$ 847 in October.
The cheapest round-trip price found within the last 5 days was C$ 492 on WestJet (1 Oct-4 Oct).

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
10,116 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Comfort

7.3

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
10,116 reviews
United Airlines
7.4
Good
10,116 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Comfort

7.3

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
11,526 reviews
United Airlines
7.4
Good
10,116 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Comfort

7.3

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 WestJet and Delta fly from Ottawa to Denver in about 12h 26m. The time it takes to get you to your destination can typically vary by up to 11h 34m. The distance from Ottawa to Denver is about 2435 km. This flight may include one or multiple stops.

  • 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$ 374 on this airline. An additional option worth looking into is Air Canada, starting at C$ 394. You may be able to fly from Ottawa to Denver for 55% 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$ 457). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,247). 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
Thornton
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$ 374AverageC$ 771FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 394AverageC$ 819FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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