What’s the top layover airport for flights from Ottawa to Denver?

Toronto (YYZ) – chosen by Cheapflights users on 56% of one-stop itineraries from Ottawa to Denver on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to Denver?

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 416.

Which airport typically offers the quickest layover for flights from Ottawa to Denver?

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 22m.

What’s the fastest layover option from Ottawa to Denver?

Flights via Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 6h 38m.

How long is the flight from Ottawa to Denver?

Airlines like United Airlines fly from Ottawa to Denver in about 6h 49m. 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$ 303 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 328 and C$ 354 round-trip. You may be able to fly from Ottawa to Denver for 52% less than the average price by searching for these airlines.

What is the cheapest day to fly from Ottawa to Denver?

Travelers seeking maximum savings on their Ottawa to Denver flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

What are the most popular airlines that fly from Ottawa to Denver?

Before booking your flight from Ottawa to Denver check out the most popular airlines for this route: Air Canada, United Airlines or WestJet.

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.

C$ 332+ Flights from Ottawa to Denver

Q: 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$ 377 and C$ 503 in October. The cheapest round-trip price found within the last 3 days was C$ 332 on United Airlines (11 Oct-18 Oct).

Cheapflights Tip: The best prices from Ottawa to Denver Intl are usually found in September or November, booked 78 days in advance, depart on a Saturday or Friday and return on a Monday

Cheap flight deals from Ottawa to Denver

Round-trip from	C$ 332
Popular in	May
Cheapest in	September
Average price	C$ 448

United Airlines
11/10-18/10
2 total stops
12h 59m total
Ottawa to Denver

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (C$ 73 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

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 17 September 2025.

Sat 11/105:15 a.m.YOW - DEN

1 stop6h 49mUnited Airlines

Sat 18/101:25 p.m.DEN - YOW

1 stop6h 10mUnited Airlines

Deal found 16/9C$ 332

Tue 14/105:25 p.m.YOW - DEN

1 stop15h 17mUnited Airlines

Tue 21/106:00 a.m.DEN - YOW

1 stop6h 04mUnited Airlines

Deal found 16/9C$ 347

Thu 2/105:25 p.m.YOW - DEN

1 stop8h 05mUnited Airlines

Mon 6/1011:59 p.m.DEN - YOW

1 stop7h 12mUnited Airlines

Deal found 17/9C$ 366

Sat 22/119:45 a.m.YOW - DEN

2 stops14h 22mUnited Airlines

Sun 23/1111:59 p.m.DEN - YOW

1 stop12h 28mUnited Airlines

Deal found 16/9C$ 376

Sat 22/115:15 a.m.YOW - DEN

1 stop7h 08mUnited Airlines

Sat 22/118:30 p.m.DEN - YOW

1 stop11h 56mUnited Airlines

Deal found 16/9C$ 377

Sat 6/126:00 a.m.YOW - DEN

2 stops12h 30mUnited Airlines

Thu 11/126:00 a.m.DEN - YOW

2 stops9h 18mUnited Airlines

Deal found 16/9C$ 393

Thu 2/105:15 a.m.YOW - DEN

2 stops14h 03mAir Canada

Mon 6/106:05 p.m.DEN - YOW

1 stop12h 18mAir Canada

Deal found 17/9C$ 417

Tue 30/125:15 a.m.YOW - DEN

1 stop7h 08mUnited Airlines

Thu 1/16:00 a.m.DEN - YOW

1 stop9h 18mUnited Airlines

Deal found 16/9C$ 476

Thu 9/109:55 p.m.YOW - DEN

1 stop14h 09mAir Canada

Mon 13/106:05 p.m.DEN - YOW

1 stop12h 18mAir Canada

Deal found 16/9C$ 480

Best flights from Ottawa to Denver
Discover carefully curated flight deals from Ottawa to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Sun 12/105:15 a.m.YOW - DEN

1 stop6h 49mUnited Airlines

Sat 18/107:46 a.m.DEN - YOW

1 stop6h 57mUnited Airlines

Deal found 16/9C$ 332

Sat 11/105:15 a.m.YOW - DEN

1 stop6h 49mUnited Airlines

Sat 18/101:25 p.m.DEN - YOW

1 stop6h 10mUnited Airlines

Deal found 16/9C$ 332

Tue 14/105:25 p.m.YOW - DEN

1 stop15h 17mUnited Airlines

Tue 21/106:00 a.m.DEN - YOW

1 stop6h 04mUnited Airlines

Deal found 16/9C$ 347

Thu 2/105:25 p.m.YOW - DEN

1 stop8h 05mUnited Airlines

Mon 6/1011:59 p.m.DEN - YOW

1 stop7h 12mUnited Airlines

Deal found 17/9C$ 366

Tue 3/35:14 p.m.YOW - DEN

1 stop7h 42mUnited Airlines

Wed 4/37:45 a.m.DEN - YOW

1 stop7h 05mUnited Airlines

Deal found 15/9C$ 376

Sat 22/113:10 p.m.YOW - DEN

1 stop8h 13mUnited Airlines

Sun 23/118:30 p.m.DEN - YOW

1 stop11h 56mUnited Airlines

Deal found 16/9C$ 376

Thu 19/212:05 p.m.YOW - DEN

1 stop7h 41mUnited Airlines

Tue 24/211:40 p.m.DEN - YOW

2 stops11h 38mUnited Airlines

Deal found 16/9C$ 378

Last-minute flights from Ottawa to Denver
Discover last-minute flight deals from Ottawa to Denver. Data last updated 17 September 2025 and is based on user searches.

Thu 2/105:25 p.m.YOW - DEN

1 stop8h 05mUnited Airlines

Mon 6/1011:59 p.m.DEN - YOW

1 stop7h 12mUnited Airlines

Deal found 17/9C$ 366

Thu 2/105:15 a.m.YOW - DEN

2 stops14h 03mAir Canada

Mon 6/106:05 p.m.DEN - YOW

1 stop12h 18mAir Canada

Deal found 17/9C$ 417

Thu 2/108:35 a.m.YOW - DEN

2 stops9h 28mMultiple Airlines

Mon 6/1012:15 p.m.DEN - YOW

2 stops26h 04mMultiple Airlines

Deal found 17/9C$ 502

Thu 9/109:55 p.m.YOW - DEN

1 stop14h 09mAir Canada

Mon 13/106:05 p.m.DEN - YOW

1 stop12h 18mAir Canada

Deal found 16/9C$ 480

Sat 11/105:15 a.m.YOW - DEN

1 stop6h 49mUnited Airlines

Sat 18/101:25 p.m.DEN - YOW

1 stop6h 10mUnited Airlines

Deal found 16/9C$ 332

Sat 11/107:15 p.m.YOW - DEN

1 stop18h 09mMultiple Airlines

Fri 17/1012:59 a.m.DEN - YOW

2 stops12h 57mMultiple Airlines

Deal found 16/9C$ 503

Tue 14/105:25 p.m.YOW - DEN

1 stop15h 17mUnited Airlines

Tue 21/106:00 a.m.DEN - YOW

1 stop6h 04mUnited Airlines

Deal found 16/9C$ 347

Tue 14/1010:50 a.m.YOW - DEN

1 stop16h 18mMultiple Airlines

Mon 20/1012:36 a.m.DEN - YOW

2 stops34h 23mMultiple Airlines

Deal found 16/9C$ 597

Fly from

Fly to

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 12/10

5:15 a.m.-10:04 a.m.

1 stop6h 49m

Denver Intl

Sat 18/10

7:46 a.m.-4:43 p.m.

1 stop6h 57m

C$ 332

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 11/10

5:15 a.m.-10:04 a.m.

1 stop6h 49m

Denver Intl

Sat 18/10

1:25 p.m.-9:35 p.m.

1 stop6h 10m

C$ 332

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 14/10

5:25 p.m.-6:42 a.m.

1 stop15h 17m

Denver Intl

Tue 21/10

6:00 a.m.-2:04 p.m.

1 stop6h 04m

C$ 347

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 2/10

5:25 p.m.-11:30 p.m.

1 stop8h 05m

Denver Intl

Mon 6/10

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

1 stop7h 12m

C$ 366

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Tue 3/3

5:14 p.m.-10:56 p.m.

1 stop7h 42m

Denver Intl

Wed 4/3

7:45 a.m.-4:50 p.m.

1 stop7h 05m

C$ 376

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 22/11

3:10 p.m.-9:23 p.m.

1 stop8h 13m

Denver Intl

Sun 23/11

8:30 p.m.-10:26 a.m.

1 stop11h 56m

C$ 376

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 19/2

12:05 p.m.-5:46 p.m.

1 stop7h 41m

Denver Intl

Tue 24/2

11:40 p.m.-1:18 p.m.

2 stops11h 38m

C$ 378

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 1/11

6:55 p.m.-8:41 a.m.

2 stops39h 46m

C$ 351

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 26/9

4:25 p.m.-7:07 p.m.

2 stops28h 42m

C$ 384

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/9

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

Prices

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

To ensure you get the cheapest price possible for a flight from Ottawa to Denver, you should look to book at least 78 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?

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.

How much does it cost to fly round-trip from Ottawa to Denver?

Reviews of airlines servicing Denver

Read reviews from past customers who have flown United Airlines,WestJet, andAir 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

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

United Airlines

7.4

Good

8,926 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

WestJet

7.2

Good

3,095 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 6h 49m. 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$ 303 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at C$ 328 and C$ 354 round-trip. You may be able to fly from Ottawa to Denver for 52% 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, 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

Golden

Westminster

Thornton

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ottawa to Denver

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	CheapestC$ 303	AverageC$ 502	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
WestJet	CheapestC$ 328	AverageC$ 474	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 354	AverageC$ 629	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Denver for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ottawa to Denver with no change fees?

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

Can Cheapflights notify me if prices for flights from Ottawa to Denver become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Ottawa to Denver from C$ 332

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Ottawa to Denver Intl are usually found in September or November, booked 78 days in advance, depart on a Saturday or Friday and return on a Monday

Cheap flight deals from Ottawa to Denver

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Ottawa to Denver

Cheapest flights from Ottawa to DenverExplore 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 17 September 2025.

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 17 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to Denver that are best for you.

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.

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?

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

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

How much does it cost to fly round-trip from Ottawa to Denver?

What’s the top layover airport for flights from Ottawa to Denver?

What’s the fastest layover option from Ottawa to Denver?

What’s the fastest layover option from Ottawa to Denver?

Which airport typically offers the quickest layover for flights from Ottawa to Denver?

Reviews of airlines servicing Denver

Read reviews from past customers who have flown United Airlines,WestJet, andAir 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.

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.

How long is the flight from Ottawa to Denver?

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

Can I find deals for flights from Ottawa to Denver that include hotel bookings?

How can I find direct flights from Ottawa to Denver?

Can I find deals for business class flights from Ottawa to Denver?

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

Travelling to a place near Denver?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ottawa to Denver

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Ottawa to Denver

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

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

Can Cheapflights find flights from Ottawa to Denver with no change fees?

Can Cheapflights notify me if prices for flights from Ottawa to Denver become cheaper?

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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 17 September 2025.