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Cheap flights from Denver to Ottawa from $144

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Ottawa departing on 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Denver to Ottawa (DEN-YOW)

Cheap round-trip flights

Logo
4:14 pm - 2:56 pmDEN-YOW
20h 42m1 stop
Logo
5:15 pm - 11:24 amYOW-DEN
20h 09m2 stops
$380
Find Deal
Thu, Oct 2 - Sun, Oct 5
Logo
12:15 pm - 6:45 amDEN-YOW
16h 30m1 stop
Logo
5:55 am - 9:33 amYOW-DEN
29h 38m2 stops
$403
Find Deal
Thu, Sep 25 - Mon, Sep 29
Air Canada Logo
7:05 pm - 8:23 amDEN-YOW
11h 18m1 stop
Air Canada Logo
9:35 am - 7:23 pmYOW-DEN
11h 48m1 stop
$465Air Canada
Find Deal
Wed, Sep 17 - Tue, Sep 23
Air Canada Logo
7:05 pm - 8:23 amDEN-YOW
11h 18m1 stop
Air Canada Logo
5:15 am - 10:14 amYOW-DEN
6h 59m1 stop
$473Air Canada
Find Deal
Wed, Sep 17 - Sun, Sep 21
United Airlines Logo
1:25 pm - 9:35 pmDEN-YOW
6h 10m1 stop
United Airlines Logo
7:29 pm - 11:57 pmYOW-DEN
6h 28m1 stop
$481United Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18
United Airlines Logo
6:00 am - 5:04 pmDEN-YOW
9h 04m2 stops
United Airlines Logo
7:29 pm - 11:57 pmYOW-DEN
6h 28m1 stop
$539United Airlines
Find Deal
Tue, Sep 30 - Tue, Sep 30
Delta Logo
11:26 am - 12:22 amDEN-YOW
10h 56m2 stops
Delta Logo
5:40 am - 1:57 pmYOW-DEN
10h 17m2 stops
$740Delta
Find Deal
Tue, Oct 21 - Tue, Oct 28
WestJet Logo
6:25 am - 12:40 amDEN-YOW
16h 15m2 stops
WestJet Logo
7:15 pm - 6:09 pmYOW-DEN
48h 54m2 stops
$891WestJet
Find Deal
Mon, Dec 1 - Mon, Dec 8
WestJet Logo
6:25 pm - 4:53 pmDEN-YOW
44h 28m2 stops
WestJet Logo
6:00 am - 12:03 pmYOW-DEN
32h 03m2 stops
$978WestJet
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Tue, Dec 23 - Tue, Jan 6
Delta Logo
10:30 am - 12:39 amDEN-YOW
12h 09m2 stops
Delta Logo
5:40 am - 2:11 pmYOW-DEN
10h 31m2 stops
$1,000Delta
Find Deal
Tue, Feb 10 - Mon, Feb 16

Air Canada flights from Denver to Ottawa

Our best Air Canada deals on Denver to Ottawa flight tickets
Air Canada
Sep 17
DEN7:05 pmDenver Intl
11h 18m
1 stop
YOW8:23 amOttawa
Sep 23
YOW9:35 amOttawa
11h 48m
1 stop
DEN7:23 pmDenver Intl
$465
Find similar
Air Canada
Sep 17
DEN7:05 pmDenver Intl
11h 18m
1 stop
YOW8:23 amOttawa
Sep 21
YOW5:15 amOttawa
6h 59m
1 stop
DEN10:14 amDenver Intl
$473
Find similar
Air Canada
Oct 2
DEN5:30 pmDenver Intl
6h 04m
1 stop
YOW1:34 amOttawa
Oct 5
YOW8:35 amOttawa
9h 49m
1 stop
DEN4:24 pmDenver Intl
$503
Find similar

United Airlines flights from Denver to Ottawa

Our best United Airlines deals on Denver to Ottawa flight tickets
United Airlines
Oct 11
DEN1:25 pmDenver Intl
6h 10m
1 stop
YOW9:35 pmOttawa
Oct 18
YOW7:29 pmOttawa
6h 28m
1 stop
DEN11:57 pmDenver Intl
$481
Find similar
United Airlines
Sep 30
DEN6:00 amDenver Intl
9h 04m
2 stops
YOW5:04 pmOttawa
Sep 30
YOW7:29 pmOttawa
6h 28m
1 stop
DEN11:57 pmDenver Intl
$539
Find similar
United Airlines
Oct 11
DEN11:59 pmDenver Intl
13h 05m
2 stops
YOW3:04 pmOttawa
Oct 18
YOW5:15 amOttawa
8h 43m
1 stop
DEN11:58 amDenver Intl
$564
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Ottawa 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, momondo users made 832,500 searches. Data last updated August 28, 2025.
Use the filters below to find and compare flights from Denver to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 10/2

4:14 pm-2:56 pm

1 stop20h 42m

Ottawa

Sun 10/5

5:15 pm-11:24 am

2 stops20h 09m

$380

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Thu 9/25

12:15 pm-6:45 am

1 stop16h 30m

Ottawa

Mon 9/29

5:55 am-9:33 am

2 stops29h 38m

$403

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 9/17

7:05 pm-8:23 am

1 stop11h 18m

Ottawa

Tue 9/23

9:35 am-7:23 pm

1 stop11h 48m

$465

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Wed 9/17

7:05 pm-8:23 am

1 stop11h 18m

Ottawa

Sun 9/21

5:15 am-10:14 am

1 stop6h 59m

$473

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Sat 10/11

1:25 pm-9:35 pm

1 stop6h 10m

Ottawa

Sat 10/18

7:29 pm-11:57 pm

1 stop6h 28m

$481

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 9/30

6:00 am-5:04 pm

2 stops9h 04m

Ottawa

Tue 9/30

7:29 pm-11:57 pm

1 stop6h 28m

$539

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 10/21

11:26 am-12:22 am

2 stops10h 56m

Ottawa

Tue 10/28

5:40 am-1:57 pm

2 stops10h 17m

$740

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Mon 12/1

6:25 am-12:40 am

2 stops16h 15m

Ottawa

Mon 12/8

7:15 pm-6:09 pm

2 stops48h 54m

$891

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 12/23

6:25 pm-4:53 pm

2 stops44h 28m

Ottawa

Tue 1/6

6:00 am-12:03 pm

2 stops32h 03m

$978

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Tue 2/10

10:30 am-12:39 am

2 stops12h 09m

Ottawa

Mon 2/16

5:40 am-2:11 pm

2 stops10h 31m

$1,000

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ottawa from

How to get the cheapest flight ticket from Denver to Ottawa

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

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

The cheapest day to depart from Denver to Ottawa is on a Wednesday. Travelers who choose to depart for Ottawa on a Wednesday will often find tickets for as low as $391. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Sunday is $756.

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

In the afternoon is the cheapest time of day to fly from Denver to Ottawa when you can find flight prices for as low as $411. Flying to Ottawa in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $579 on average. Flights to Ottawa from Denver at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Denver to Ottawa

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

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

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

Direct flights

None
There are no direct flights from Denver to Ottawa. There are no popular flight routes from Denver to Ottawa.
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  • How far is Denver Intl to Ottawa by plane?

    Denver Intl and Ottawa are 1530.4 mi apart from one another. By plane, this route typically takes 5h 48m.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The travel and health documents required for your trip to Ottawa 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 Ottawa 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 Denver to Ottawa?

Best airlines flying from Denver to Ottawa

Compare and see reviews for airlines that fly from Denver to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $143Free CancellationRating
7.2
3,063 reviews
Search WestJet flights
Air CanadaPriceFrom $293Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $309Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Smiths Falls
Calabogie
Brockville
Pembroke
Petawawa
Perth
Prescott
Winchester
Wakefield

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ottawa from Denver.

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

Flights from Denver to Ottawa with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ottawa from Denver.

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

Of course. momondo tracks the price of Denver to Ottawa flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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