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Cheap flights from Ottawa to Denver from C$ 220

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/7. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from Ottawa to Denver Intl are usually found in September or November, booked 45 days in advance, depart on a Saturday or Friday and return on a Monday

Cheap flight deals from Ottawa to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 June 2025.

Round-trip from

C$ 350

One-way from

C$ 220

Popular in

May

Cheapest in

September

Average price

C$ 537
WestJet
  • WestJet
  • 9/8-11/8
  • 2 total stops
  • 28h 38m total
  • Ottawa to Denver
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United Airlines
  • United Airlines
  • 26/7
  • 1 total stop
  • 7h 01m total
  • Ottawa to Denver
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Highest demand for flights based on searches. 6% potential increase in price (C$ 63 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Ottawa to Denver

Cheapest flights from Ottawa to Denver
Explore the most affordable flight options available from Ottawa to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 June 2025.

Sat 9/87:15 p.m.YOW - DEN
1 stop18h 12mWestJet
Mon 11/812:15 p.m.DEN - YOW
1 stop10h 26mWestJet
Deal found 12/6C$ 350
Sat 5/75:50 p.m.YOW - DEN
1 stop7h 39mUnited Airlines
Sat 12/711:54 p.m.DEN - YOW
1 stop7h 17mUnited Airlines
Deal found 10/6C$ 365
Tue 8/72:48 p.m.YOW - DEN
1 stop8h 29mLufthansa
Tue 15/75:59 p.m.DEN - YOW
2 stops13h 12mLufthansa
Deal found 10/6C$ 392
Sun 24/86:00 a.m.YOW - DEN
1 stop6h 21mAir Canada
Thu 28/87:45 a.m.DEN - YOW
1 stop7h 20mAir Canada
Deal found 10/6C$ 422
Tue 8/76:50 p.m.YOW - DEN
1 stop18h 37mMultiple Airlines
Tue 15/712:15 p.m.DEN - YOW
3 stops25h 06mMultiple Airlines
Deal found 10/6C$ 577
Tue 14/105:55 a.m.YOW - DEN
2 stops14h 07mDelta
Sat 18/106:45 a.m.DEN - YOW
2 stops15h 37mDelta
Deal found 10/6C$ 614

Cheapflights Fare Finder

Customize your flight search to find flights from Ottawa to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 June 2025.
Use the filters below to find and compare flights from Ottawa to Denver that are best for you.

Fly from

Ottawa

Fly to

Denver

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 9/8

7:15 p.m.-11:27 a.m.

1 stop18h 12m

Denver Intl

Mon 11/8

12:15 p.m.-12:41 a.m.

1 stop10h 26m

C$ 350

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 5/7

5:50 p.m.-11:29 p.m.

1 stop7h 39m

Denver Intl

Sat 12/7

11:54 p.m.-9:11 a.m.

1 stop7h 17m

C$ 365

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 8/7

2:48 p.m.-9:17 p.m.

1 stop8h 29m

Denver Intl

Tue 15/7

5:59 p.m.-9:11 a.m.

2 stops13h 12m

C$ 392

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 24/8

6:00 a.m.-10:21 a.m.

1 stop6h 21m

Denver Intl

Thu 28/8

7:45 a.m.-5:05 p.m.

1 stop7h 20m

C$ 422

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 8/7

6:50 p.m.-11:27 a.m.

1 stop18h 37m

Denver Intl

Tue 15/7

12:15 p.m.-3:21 p.m.

3 stops25h 06m

C$ 577

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 14/10

5:55 a.m.-6:02 p.m.

2 stops14h 07m

Denver Intl

Sat 18/10

6:45 a.m.-12:22 a.m.

2 stops15h 37m

C$ 614

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 26/7

7:29 p.m.-12:30 a.m.

1 stop7h 01m

C$ 220

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 27/7

6:00 a.m.-10:21 a.m.

1 stop6h 21m

C$ 223

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 27/7

5:15 p.m.-11:27 a.m.

2 stops44h 12m

C$ 260

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 23/6

6:00 a.m.-4:01 a.m.

3 stops24h 01m

C$ 396

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Denver

How far ahead should I book a flight from Ottawa to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Denver. Price data was last updated on 9 June 2025.

To ensure you get the cheapest price possible for a flight from Ottawa to Denver, you should look to book at least 45 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Ottawa to Denver?

Currently, August is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 320). Flying from Ottawa to Denver in December is currently the most expensive (average of C$ 484). 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.

What is the cheapest time of day to fly from YOW to DEN?

Find hourly flight availability from Ottawa to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 June 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 32% on flights from Ottawa to Denver by exploring options for tickets in the evening.

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 mm per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated 12 June 2025.
Read through reviews of airlines operating flights from Ottawa to Denver, such as Delta, United Airlines and WestJet. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,139 reviews
Delta
8.0
Very good
7,946 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ottawa to Denver round-trip?

    Our cheapest airline available from Ottawa to Denver is WestJet. Our recent data shows that you can find tickets from as low as C$ 350 on this airline. Additional options worth looking into are United Airlines and Lufthansa, starting at C$ 365 and C$ 392 round-trip. You may be able to fly from Ottawa to Denver for 45% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Ottawa to Denver one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as C$ 220. However, be on the lookout for offers from Air Canada and WestJet, as they are both options that can get you from Ottawa to Denver for a low price.

  • 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, August is the cheapest month in which you can book a flight from Ottawa to Denver (average of C$ 320). Flying from Ottawa to Denver in December is currently the most expensive (average of C$ 484). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Golden
Westminster
Thornton

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Top 3 airlines flying from Ottawa to Denver

Discover the top 3 airlines that operate flights from Ottawa to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 242AverageC$ 416FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 361AverageC$ 641FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 381AverageC$ 692FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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How does Cheapflights help users find flights from Ottawa to Denver?

Deals for Ottawa to Denver flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Denver?

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Denver flexibly with Cheapflights today.

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