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Cheap flights from Denver to Ottawa from $255

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 8/20. 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
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
Multiple Airlines Logo
7:12 pm - 2:33 pmDEN  Denver Intl-YOW Ottawa
17h 21m1 stop Orlando
Multiple Airlines Logo
2:00 pm - 11:20 amYOW  Ottawa-DEN Denver Intl
23h 20m2 stops Hamilton Calgary
$407Multiple Airlines
Thu, Sep 10 - Sun, Sep 20
Multiple Airlines Logo
7:12 pm - 2:33 pmDEN  Denver Intl-YOW Ottawa
17h 21m1 stop Orlando
Multiple Airlines Logo
8:35 am - 11:20 amYOW  Ottawa-DEN Denver Intl
28h 45m1 stop Calgary
$410Multiple Airlines
Thu, Sep 10 - Sun, Sep 20
Multiple Airlines Logo
10:48 pm - 7:20 pmDEN  Denver Intl-YOW Ottawa
18h 32m2 stops Phoenix Sky Harbor Intl Calgary
Multiple Airlines Logo
7:00 am - 3:37 pmYOW  Ottawa-DEN Denver Intl
10h 37m1 stop Orlando
$414Multiple Airlines
Tue, Sep 8 - Fri, Sep 11
Multiple Airlines Logo
12:15 pm - 7:20 pmDEN  Denver Intl-YOW Ottawa
29h 05m1 stop Calgary
Multiple Airlines Logo
1:20 pm - 9:00 amYOW  Ottawa-DEN Denver Intl
21h 40m2 stops Calgary Phoenix Sky Harbor Intl
$414Multiple Airlines
Sun, Oct 11 - Sat, Oct 17
Air Canada Logo
11:20 am - 7:52 pmDEN  Denver Intl-YOW Ottawa
6h 32m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
2:55 pm - 8:27 pmYOW  Ottawa-DEN Denver Intl
7h 32m1 stop Montreal Pierre Elliott Trudeau Intl
$719Air Canada
Wed, Nov 25 - Mon, Nov 30
Air Canada Logo
11:25 am - 8:51 pmDEN  Denver Intl-YOW Ottawa
7h 26m1 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 7 - Thu, Sep 10
Air Canada Logo
11:25 am - 7:45 pmDEN  Denver Intl-YOW Ottawa
6h 20m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
2:35 pm - 6:46 pmYOW  Ottawa-DEN Denver Intl
6h 11m1 stop Montreal Pierre Elliott Trudeau Intl
$729Air Canada
Wed, Oct 14 - Wed, Oct 21
Air Canada Logo
11:25 am - 8:50 pmDEN  Denver Intl-YOW Ottawa
7h 25m1 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
Sat, Oct 10 - Sat, Oct 17
United Airlines Logo
9:35 am - 5:16 pmDEN  Denver Intl-YOW Ottawa
5h 41m1 stop Chicago O'Hare Intl
United Airlines Logo
10:37 am - 2:32 pmYOW  Ottawa-DEN Denver Intl
5h 55m1 stop Chicago O'Hare Intl
$905United Airlines
Sat, Sep 26 - Sat, Oct 3

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WestJet flights from Denver to Ottawa

Our best WestJet deals on Denver to Ottawa flight tickets
WestJet
Oct 11
DEN12:15 pmDenver Intl
29h 05m
1 stop
YOW7:20 pmOttawa
Oct 17
YOW4:15 pmOttawa
21h 05m
1 stop
DEN11:20 amDenver Intl
$426
WestJet
Sep 10
DEN12:15 pmDenver Intl
22h 15m
2 stops
YOW12:30 pmOttawa
Sep 13
YOW6:15 pmOttawa
19h 05m
2 stops
DEN11:20 amDenver Intl
$527
WestJet
Aug 25
DEN12:15 pmDenver Intl
15h 20m
1 stop
YOW5:35 amOttawa
Aug 31
YOW7:20 amOttawa
30h 00m
1 stop
DEN11:20 amDenver Intl
$536

Delta flights from Denver to Ottawa

Our best Delta deals on Denver to Ottawa flight tickets
Delta
Oct 11
DEN6:10 amDenver Intl
9h 25m
2 stops
YOW5:35 pmOttawa
Oct 18
YOW12:25 pmOttawa
13h 19m
2 stops
DEN11:44 pmDenver Intl
$704
Delta
Sep 23
DEN12:10 pmDenver Intl
10h 10m
2 stops
YOW12:20 amOttawa
Sep 30
YOW6:55 amOttawa
12h 26m
2 stops
DEN5:21 pmDenver Intl
$712
Delta
Sep 26
DEN6:30 amDenver Intl
9h 05m
2 stops
YOW5:35 pmOttawa
Oct 3
YOW12:25 pmOttawa
9h 40m
2 stops
DEN8:05 pmDenver Intl
$715

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 13, 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

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

Thu 9/10

7:12 pm-2:33 pm

1 stop17h 21m

Ottawa

Sun 9/20

2:00 pm-11:20 am

2 stops23h 20m

$407

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Thu 9/10

7:12 pm-2:33 pm

1 stop17h 21m

Ottawa

Sun 9/20

8:35 am-11:20 am

1 stop28h 45m

$410

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Tue 9/8

10:48 pm-7:20 pm

2 stops18h 32m

Ottawa

Fri 9/11

7:00 am-3:37 pm

1 stop10h 37m

$414

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Sun 10/11

12:15 pm-7:20 pm

1 stop29h 05m

Ottawa

Sat 10/17

1:20 pm-9:00 am

2 stops21h 40m

$414

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Wed 11/25

11:20 am-7:52 pm

1 stop6h 32m

Ottawa

Mon 11/30

2:55 pm-8:27 pm

1 stop7h 32m

$719

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Mon 9/7

11:25 am-8:51 pm

1 stop7h 26m

Ottawa

Thu 9/10

6:00 am-10:31 am

1 stop6h 31m

$729

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Wed 10/14

11:25 am-7:45 pm

1 stop6h 20m

Ottawa

Wed 10/21

2:35 pm-6:46 pm

1 stop6h 11m

$729

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Sat 10/10

11:25 am-8:50 pm

1 stop7h 25m

Ottawa

Sat 10/17

6:00 am-10:31 am

1 stop6h 31m

$729
Quickest round-trip

DenverOttawa

DEN Denver Intl - YOW Ottawa

DENYOW

Denver Intl

Sat 9/26

9:35 am-5:16 pm

1 stop5h 41m

Ottawa

Sat 10/3

10:37 am-2:32 pm

1 stop5h 55m

$905

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 $396.

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

6h 32m

Direct flights

None
The fastest flight from Denver to Ottawa takes 6h 32m
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 6h 32m.

  • 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
11,466 reviews
Search Air Canada flights
United AirlinesPriceFrom $462Free CancellationRating
7.4
10,113 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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