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Cheap flights from Denver to Ottawa from $172

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 9/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Denver to Ottawa

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 am - 5:35 amDEN  Denver Intl-YOW Ottawa
20h 35m2 stops Phoenix Sky Harbor Intl Calgary
Multiple Airlines Logo
8:15 pm - 11:20 amYOW  Ottawa-DEN Denver Intl
17h 05m1 stop Calgary
$387Multiple Airlines
Fri, Sep 25 - Thu, Oct 1
Multiple Airlines Logo
12:15 pm - 5:35 amDEN  Denver Intl-YOW Ottawa
15h 20m1 stop Calgary
Multiple Airlines Logo
2:20 pm - 9:03 pmYOW  Ottawa-DEN Denver Intl
32h 43m2 stops Boston Logan Intl Atlanta Hartsfield-Jackson
$396Multiple Airlines
Fri, Sep 25 - Mon, Sep 28
WestJet Logo
12:15 pm - 5:35 amDEN  Denver Intl-YOW Ottawa
15h 20m1 stop Calgary
WestJet Logo
8:15 pm - 11:20 amYOW  Ottawa-DEN Denver Intl
17h 05m1 stop Calgary
$404WestJet
Fri, Sep 25 - Thu, Oct 1
Multiple Airlines Logo
12:15 pm - 5:35 amDEN  Denver Intl-YOW Ottawa
15h 20m1 stop Calgary
Multiple Airlines Logo
7:20 am - 11:48 pmYOW  Ottawa-DEN Denver Intl
18h 28m2 stops Calgary Phoenix Sky Harbor Intl
$406Multiple Airlines
Fri, Sep 25 - Mon, Sep 28
Air Canada Logo
11:25 am - 8:44 pmDEN  Denver Intl-YOW Ottawa
7h 19m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
6:00 am - 10:31 amYOW  Ottawa-DEN Denver Intl
6h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$729Air Canada
Mon, Sep 28 - Tue, Sep 29
Air Canada Logo
11:25 am - 8:44 pmDEN  Denver Intl-YOW Ottawa
7h 19m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
6:00 am - 10:31 amYOW  Ottawa-DEN Denver Intl
6h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$729Air Canada
Wed, Sep 16 - Mon, Sep 21
Air Canada Logo
6:05 pm - 1:35 amDEN  Denver Intl-YOW Ottawa
5h 30m1 stop Toronto Pearson Intl
Air Canada Logo
6:00 am - 10:31 amYOW  Ottawa-DEN Denver Intl
6h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$733Air Canada
Thu, Oct 8 - Tue, Oct 13
United Airlines Logo
12:40 pm - 10:35 pmDEN  Denver Intl-YOW Ottawa
7h 55m1 stop Newark
United Airlines Logo
6:00 am - 4:33 pmYOW  Ottawa-DEN Denver Intl
12h 33m1 stop Washington, D.C. Dulles Intl
$788United Airlines
Fri, Sep 4 - Tue, Sep 8
United Airlines Logo
8:00 am - 11:54 pmDEN  Denver Intl-YOW Ottawa
13h 54m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
6:25 am - 10:32 amYOW  Ottawa-DEN Denver Intl
6h 07m1 stop Chicago O'Hare Intl
$788United Airlines
Fri, Sep 4 - Tue, Sep 8
United Airlines Logo
5:00 am - 9:56 pmDEN  Denver Intl-YOW Ottawa
14h 56m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
2:00 pm - 9:28 pmYOW  Ottawa-DEN Denver Intl
9h 28m1 stop Washington, D.C. Dulles Intl
$903United Airlines
Mon, Dec 21 - Tue, Dec 22

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Delta flights from Denver to Ottawa

Our best Delta deals on Denver to Ottawa flight tickets
Delta
Aug 21
DEN6:20 amDenver Intl
21h 15m
2 stops
YOW5:35 amOttawa
Oct 23
YOW12:25 pmOttawa
13h 19m
2 stops
DEN11:44 pmDenver Intl
$840
Delta
Aug 21
DEN1:21 pmDenver Intl
14h 14m
2 stops
YOW5:35 amOttawa
Oct 20
YOW6:50 amOttawa
13h 02m
2 stops
DEN5:52 pmDenver Intl
$848
Delta
Aug 21
DEN6:00 amDenver Intl
16h 20m
2 stops
YOW12:20 amOttawa
Aug 25
YOW6:55 amOttawa
12h 28m
2 stops
DEN5:23 pmDenver Intl
$912

Air Canada flights from Denver to Ottawa

Our best Air Canada deals on Denver to Ottawa flight tickets
Air Canada
Aug 20
DEN11:25 amDenver Intl
7h 19m
1 stop
YOW8:44 pmOttawa
Oct 19
YOW6:00 amOttawa
6h 31m
1 stop
DEN10:31 amDenver Intl
$962
Air Canada
Aug 14
DEN9:40 amDenver Intl
8h 05m
1 stop
YOW7:45 pmOttawa
Aug 16
YOW6:00 amOttawa
6h 33m
1 stop
DEN10:33 amDenver Intl
$1,086

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 8, 2026.
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

Cheapest round-trip

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Fri 9/25

7:00 am-5:35 am

2 stops20h 35m

Ottawa

Thu 10/1

8:15 pm-11:20 am

1 stop17h 05m

$387

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Fri 9/25

12:15 pm-5:35 am

1 stop15h 20m

Ottawa

Mon 9/28

2:20 pm-9:03 pm

2 stops32h 43m

$396

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Fri 9/25

12:15 pm-5:35 am

1 stop15h 20m

Ottawa

Thu 10/1

8:15 pm-11:20 am

1 stop17h 05m

$404

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Fri 9/25

12:15 pm-5:35 am

1 stop15h 20m

Ottawa

Mon 9/28

7:20 am-11:48 pm

2 stops18h 28m

$406

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Mon 9/28

11:25 am-8:44 pm

1 stop7h 19m

Ottawa

Tue 9/29

6:00 am-10:31 am

1 stop6h 31m

$729

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Wed 9/16

11:25 am-8:44 pm

1 stop7h 19m

Ottawa

Mon 9/21

6:00 am-10:31 am

1 stop6h 31m

$729
Quickest round-trip

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Thu 10/8

6:05 pm-1:35 am

1 stop5h 30m

Ottawa

Tue 10/13

6:00 am-10:31 am

1 stop6h 31m

$733

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Fri 9/4

12:40 pm-10:35 pm

1 stop7h 55m

Ottawa

Tue 9/8

6:00 am-4:33 pm

1 stop12h 33m

$788

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Fri 9/4

8:00 am-11:54 pm

1 stop13h 54m

Ottawa

Tue 9/8

6:25 am-10:32 am

1 stop6h 07m

$788

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Mon 12/21

5:00 am-9:56 pm

2 stops14h 56m

Ottawa

Tue 12/22

2:00 pm-9:28 pm

1 stop9h 28m

$903

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 typical price of a round-trip flight between Denver and Ottawa?

Prices are currently low for flights on this route.

Typical prices usually range from $691 to $816.
The lowest price recently found on this route was $387.

What is the cheapest month to fly to Ottawa?

In general, November is the cheapest month to fly from Denver to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of October is another great option to travel to Ottawa, with average flight prices from Denver averaging around $397.

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

Fastest flight time

15h 20m

Direct flights

None
The fastest flight from Denver to Ottawa takes 15h 20m
There are no direct flights from Denver to Ottawa. There are no popular flight routes from Denver to Ottawa.
Search flight deals

Frequently asked questions about flying from Denver to Ottawa

  • 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 15h 20m.

  • 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
Air CanadaPriceFrom $363Free CancellationRating
7.1
11,452 reviews
Search Air Canada flights
United AirlinesPriceFrom $462Free CancellationRating
7.4
10,086 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
Brockville
Pembroke
Petawawa
Perth
Calabogie
Smiths Falls
Prescott
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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