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Cheap flights from Ottawa to Denver from C$ 265

YOW — DEN
15 Oct — 22 Oct1
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

Fri 2/106:55 a.m. -
2 stops9h 02m
Tue 6/1010:41 a.m. -
2 stops11h 39m
Deal found 14/9C$ 568
Sat 10/102:00 p.m. -
1 stop23h 20m
Sun 18/1010:44 p.m. -
2 stops28h 51m
Deal found 11/9C$ 585
Sat 10/107:20 a.m. -
1 stop30h 00m
Sat 17/101:10 p.m. -
2 stops14h 25m
Deal found 11/9C$ 588
Mon 19/101:20 p.m. -
2 stops21h 50m
Fri 23/107:02 p.m. -
1 stop17h 28m
Deal found 11/9C$ 611
Sat 10/104:15 p.m. -
1 stop21h 05m
Tue 13/1010:45 p.m. -
2 stops23h 40m
Deal found 14/9C$ 631
Sat 17/107:20 a.m. -
1 stop30h 00m
Sun 18/109:12 p.m. -
2 stops20h 08m
Deal found 11/9C$ 636
Mon 26/108:00 a.m. -
1 stop26h 13m
Mon 2/1110:37 p.m. -
2 stops23h 24m
Deal found 11/9C$ 652
Mon 26/105:35 a.m. -
2 stops13h 57m
Wed 28/1010:41 a.m. -
2 stops12h 03m
Deal found 11/9C$ 675
Mon 26/108:00 a.m. -
1 stop9h 47m
Wed 28/1010:37 p.m. -
2 stops24h 23m
Deal found 11/9C$ 693
Thu 22/101:20 p.m. -
2 stops32h 57m
Sat 31/107:02 p.m. -
1 stop20h 42m
Deal found 11/9C$ 706

Find flight deals from Ottawa to Denver

Round-trip from

C$ 568

One-way from

C$ 265

Popular in

January

Cheapest in

October

Average price

C$ 693
Delta
  • Delta
  • 2/10-6/10
  • 4 total stops
  • 20h 41m total
  • Ottawa to Denver
Search Deals
WestJet
  • WestJet
  • 17/10-31/12
  • 1 total stop
  • 21h 05m total
  • Ottawa to Denver
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 49 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

Sat 17/10

4:15 p.m.-11:20 a.m.

1 stop21h 05m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 265

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 22/10

1:20 p.m.-8:17 p.m.

2 stops32h 57m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 270

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 16/10

12:25 p.m.-11:44 p.m.

2 stops13h 19m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 315

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 25/9

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

2 stops14h 10m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 332

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 29/10

6:10 a.m.-5:42 p.m.

3 stops37h 32m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 381

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Mon 28/9

6:25 a.m.-3:17 p.m.

1 stop10h 52m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 474
Quickest round-trip

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Thu 22/10

6:00 a.m.-10:31 a.m.

1 stop6h 31m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 474

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 16/10

3:10 p.m.-9:06 p.m.

1 stop7h 56m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 475

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Fri 9/10

6:01 p.m.-10:41 p.m.

1 stop6h 40m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 476

OttawaDenver

YOW Ottawa - DEN Denver Intl

YOWDEN

Ottawa

Sun 18/10

5:10 a.m.-10:27 a.m.

1 stop7h 17m

Denver Intl

Wed 31/12

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

Nonstop0h 00m

C$ 486

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 21 resultsSorted by cheapest first
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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$ 461). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,259). 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
7.4
Good
10,209 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Food

6.7

Crew

8.1

Comfort

7.3

Overall

7.4

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
10,209 reviews
United Airlines
7.4
Good
10,209 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Food

6.7

Crew

8.1

Comfort

7.3

Overall

7.4

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
11,630 reviews
United Airlines
7.4
Good
10,209 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Food

6.7

Crew

8.1

Comfort

7.3

Overall

7.4

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 and United Airlines fly from Ottawa to Denver in about 9h 02m. The time it takes to get you to your destination can typically vary by up to 3h 15m. 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$ 377 on this airline. An additional option worth looking into is Air Canada, starting at C$ 441. You may be able to fly from Ottawa to Denver for 56% 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$ 461). Flying from Ottawa to Denver in January is currently the most expensive (average of C$ 1,259). 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$ 377AverageC$ 778FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 441AverageC$ 831FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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