What is the cheapest airline that flies from Ottawa to Denver Intl?

WestJet is the most popular carrier operating from Ottawa to Denver Intl

When did momondo last update prices for flights from Ottawa Airport to Denver Intl Airport?

Prices for flights from Ottawa Airport to Denver Intl Airport were last updated today.

How many operators does momondo search for flights from Ottawa Airport to Denver Intl Airport?

There are 2 operators available for flights from Ottawa Airport to Denver Intl Airport as of December 2025.

How old do you have to be to fly from Ottawa Airport to Denver Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$158 Cheap Flights from Ottawa to Denver in 2025/26

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Find the cheapest flights from Ottawa to Denver

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One-way

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Cheap round-trip flights

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9:40 am - 6:59 pm

YOW

DEN

11h 19m1 stop

7:00 am - 5:15 pm

DEN

YOW

8h 15m1 stop

$308Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

4:15 pm - 8:21 am

YOW

DEN

42h 06m2 stops

7:00 am - 5:15 pm

DEN

YOW

8h 15m1 stop

$309Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

9:40 am - 7:59 pm

YOW

DEN

12h 19m1 stop

9:20 pm - 2:45 pm

DEN

YOW

39h 25m2 stops

$321Multiple Airlines

Thu, Jan 8 - Wed, Jan 14

9:30 am - 5:36 pm

YOW

DEN

10h 06m1 stop

8:50 am - 12:25 am

DEN

YOW

13h 35m2 stops

$335Multiple Airlines

Thu, Jan 29 - Thu, Feb 5

6:45 am - 9:29 pm

YOW

DEN

16h 44m3 stops

7:00 am - 9:30 pm

DEN

YOW

12h 30m2 stops

$387Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

9:40 am - 7:59 pm

YOW

DEN

12h 19m1 stop

10:22 am - 5:15 pm

DEN

YOW

28h 53m1 stop

$394Multiple Airlines

Thu, Jan 8 - Wed, Jan 14

6:45 am - 5:49 pm

YOW

DEN

13h 04m2 stops

7:00 am - 9:30 pm

DEN

YOW

12h 30m2 stops

$411Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

9:40 am - 3:16 pm

YOW

DEN

31h 36m1 stop

6:32 pm - 11:58 pm

DEN

YOW

27h 26m1 stop

$460Multiple Airlines

Thu, Jan 29 - Thu, Feb 5

5:40 am - 5:28 pm

YOW

DEN

13h 48m2 stops

10:34 am - 12:39 am

DEN

YOW

12h 05m2 stops

$485Delta

Thu, Jan 29 - Thu, Feb 5

5:40 am - 8:44 pm

YOW

DEN

17h 04m2 stops

10:34 am - 12:42 am

DEN

YOW

12h 08m2 stops

$568Delta

Thu, Jan 8 - Wed, Jan 14

Delta flights from Ottawa to Denver

Our best Delta deals on Ottawa to Denver flight tickets

Delta

Jan 29

YOW5:40 amOttawa

13h 48m

2 stops

DEN5:28 pmDenver Intl

Feb 5

DEN10:34 amDenver Intl

12h 05m

2 stops

YOW12:39 amOttawa

$485

Find similar

Delta

Jan 8

YOW5:40 amOttawa

17h 04m

2 stops

DEN8:44 pmDenver Intl

Jan 14

DEN10:34 amDenver Intl

12h 08m

2 stops

YOW12:42 amOttawa

$568

Find similar

Delta

Feb 19

YOW5:40 amOttawa

13h 44m

2 stops

DEN5:24 pmDenver Intl

Feb 24

DEN7:05 amDenver Intl

15h 34m

2 stops

YOW12:39 amOttawa

$610

Find similar

United Airlines flights from Ottawa to Denver

Our best United Airlines deals on Ottawa to Denver flight tickets

United Airlines

Jan 15

YOW2:15 pmOttawa

12h 15m

1 stop

DEN12:30 amDenver Intl

Jan 18

DEN7:50 amDenver Intl

12h 06m

2 stops

YOW9:56 pmOttawa

$609

Find similar

United Airlines

Feb 19

YOW9:45 amOttawa

14h 02m

1 stop

DEN9:47 pmDenver Intl

Feb 24

DEN7:45 amDenver Intl

9h 10m

1 stop

YOW6:55 pmOttawa

$677

Find similar

United Airlines

Feb 19

YOW9:45 amOttawa

11h 55m

1 stop

DEN7:40 pmDenver Intl

Feb 24

DEN7:45 amDenver Intl

12h 11m

2 stops

YOW9:56 pmOttawa

$686

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 1/31

9:40 am-6:59 pm

1 stop11h 19m

Denver Intl

Sat 2/7

7:00 am-5:15 pm

1 stop8h 15m

$308

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 1/31

4:15 pm-8:21 am

2 stops42h 06m

Denver Intl

Sat 2/7

7:00 am-5:15 pm

1 stop8h 15m

$309

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/8

9:40 am-7:59 pm

1 stop12h 19m

Denver Intl

Wed 1/14

9:20 pm-2:45 pm

2 stops39h 25m

$321

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/29

9:30 am-5:36 pm

1 stop10h 06m

Denver Intl

Thu 2/5

8:50 am-12:25 am

2 stops13h 35m

$335

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 1/31

6:45 am-9:29 pm

3 stops16h 44m

Denver Intl

Sat 2/7

7:00 am-9:30 pm

2 stops12h 30m

$387

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/8

9:40 am-7:59 pm

1 stop12h 19m

Denver Intl

Wed 1/14

10:22 am-5:15 pm

1 stop28h 53m

$394

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 1/31

6:45 am-5:49 pm

2 stops13h 04m

Denver Intl

Sat 2/7

7:00 am-9:30 pm

2 stops12h 30m

$411

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/29

9:40 am-3:16 pm

1 stop31h 36m

Denver Intl

Thu 2/5

6:32 pm-11:58 pm

1 stop27h 26m

$460

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/29

5:40 am-5:28 pm

2 stops13h 48m

Denver Intl

Thu 2/5

10:34 am-12:39 am

2 stops12h 05m

$485

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Thu 1/8

5:40 am-8:44 pm

2 stops17h 04m

Denver Intl

Wed 1/14

10:34 am-12:42 am

2 stops12h 08m

$568

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ottawa to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Ottawa is in September. Flight prices, which tend to average around $325, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in September, then you should wait until October to fly from Ottawa, when ticket prices are also cheap, with an average price of $332.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Wednesday when prices can be found for as low as $285. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Friday, with ticket prices averaging around $806.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is in the morning when flights can be purchased for as low as $466. Flights in the afternoon are often more expensive with an average ticket price of $748.

How far in advance should I book a flight to Denver?

You are more likely to see cheaper flights to Denver from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $488 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Ottawa for as low as $280 on momondo.

How have Ottawa to Denver flight prices changed over time?

As of December 2025, prices for Ottawa to Denver flights are approximately 187% more expensive when compared to flights at the same time last year.

When to book flights from Ottawa to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Denver according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ottawa to Denver (YOW to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Denver

Fastest flight time	10h 28m
Direct flights	None

The fastest flight from Ottawa to Denver takes 10h 28m

There are no direct flights from Ottawa to Denver. There are no popular flight routes from Ottawa to Denver.

Search flight deals

How far is Ottawa to Denver Intl by plane?
The straight-line distance from Ottawa to Denver Intl is 1530.4 mi. Typically, this will take 10h 28m by plane in normal conditions.
When did momondo last update prices for flights from Ottawa Airport to Denver Intl Airport?
Prices for flights from Ottawa Airport to Denver Intl Airport were last updated today.
How many operators does momondo search for flights from Ottawa Airport to Denver Intl Airport?
There are 2 operators available for flights from Ottawa Airport to Denver Intl Airport as of December 2025.
How old do you have to be to fly from Ottawa Airport to Denver Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Ottawa to Denver?
momondo data reveals that the most frequently booked airline on the route from Ottawa to Denver is Air Canada, representing 67% of all bookings. The subsequent popular airline is United Airlines at 33%.

Best airlines flying from Ottawa to Denver

Compare and see reviews for airlines that fly from Ottawa to Denver with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $251	Free Cancellation	Rating 7.4 9,092 reviews		Search United Airlines flights
Air Canada	PriceFrom $267	Free Cancellation	Rating 7.1 10,531 reviews		Search Air Canada flights

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Longmont

Boulder

Greeley

Lakewood

Thornton

Westminster

Winter Park

Copper Mountain

Silverthorne

Frisco

Centennial

Grand Lake

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Denver?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ottawa to Denver. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ottawa to Denver with flexible booking policies on momondo?

Yes. All flights to Denver from Ottawa on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ottawa to Denver?

momondo helps you find the best flight between Ottawa and Denver by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ottawa to Denver right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Denver from Ottawa. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.