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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from $131

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Ottawa departing on 10/3. 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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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Ottawa

Cheap round-trip flights

Logo
11:40 am - 12:42 amIAD-YOW
13h 02m1 stop
Logo
5:40 am - 5:14 pmYOW-IAD
11h 34m1 stop
$319
Find Deal
Thu, Nov 20 - Fri, Nov 28
Logo
1:45 pm - 12:42 amIAD-YOW
10h 57m1 stop
Logo
5:40 am - 5:14 pmYOW-IAD
11h 34m1 stop
$322
Find Deal
Sat, Nov 22 - Fri, Nov 28
Porter Airlines Logo
11:35 am - 4:34 pmIAD-YOW
4h 59m1 stop
Porter Airlines Logo
8:35 am - 3:06 pmYOW-IAD
6h 31m1 stop
$325Porter Airlines
Find Deal
Sun, Oct 12 - Sun, Oct 19
Porter Airlines Logo
11:35 am - 4:34 pmIAD-YOW
4h 59m1 stop
Porter Airlines Logo
8:35 am - 3:06 pmYOW-IAD
6h 31m1 stop
$326Porter Airlines
Find Deal
Thu, Oct 9 - Thu, Oct 16
Logo
6:45 pm - 12:40 amIAD-YOW
29h 55m1 stop
Logo
9:35 am - 3:06 pmYOW-IAD
5h 31m1 stop
$327
Find Deal
Fri, Oct 3 - Mon, Oct 6
Porter Airlines Logo
11:40 am - 3:04 pmIAD-YOW
3h 24m1 stop
Porter Airlines Logo
6:50 am - 10:24 amYOW-IAD
3h 34m1 stop
$329Porter Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
Logo
6:30 pm - 5:29 pmIAD-YOW
22h 59m1 stop
Logo
5:40 am - 5:14 pmYOW-IAD
11h 34m1 stop
$330
Find Deal
Fri, Nov 21 - Fri, Nov 28
United Airlines Logo
6:15 am - 12:16 pmIAD-YOW
6h 01m1 stop
United Airlines Logo
2:45 pm - 4:28 pmYOW-IAD
1h 43mnonstop
$405United Airlines
Find Deal
Sat, Oct 18 - Sat, Oct 18
United Airlines Logo
8:20 am - 2:04 pmIAD-YOW
5h 44m1 stop
United Airlines Logo
5:50 pm - 10:58 pmYOW-IAD
5h 08m1 stop
$408United Airlines
Find Deal
Sat, Oct 18 - Sat, Oct 18
United Airlines Logo
10:12 pm - 11:54 pmIAD-YOW
1h 42mnonstop
United Airlines Logo
2:15 pm - 4:09 pmYOW-IAD
1h 54mnonstop
$424United Airlines
Find Deal
Fri, Nov 7 - Sun, Nov 9

Porter Airlines flights from Washington, D.C. Dulles Intl Airport to Ottawa

Our best Porter Airlines deals on Washington, D.C. Dulles Intl Airport to Ottawa flight tickets
Porter Airlines
Oct 12
IAD11:35 amWashington, D.C. Dulles Intl
4h 59m
1 stop
YOW4:34 pmOttawa
Oct 19
YOW8:35 amOttawa
6h 31m
1 stop
IAD3:06 pmWashington, D.C. Dulles Intl
$325
Find similar
Porter Airlines
Oct 9
IAD11:35 amWashington, D.C. Dulles Intl
4h 59m
1 stop
YOW4:34 pmOttawa
Oct 16
YOW8:35 amOttawa
6h 31m
1 stop
IAD3:06 pmWashington, D.C. Dulles Intl
$326
Find similar
Porter Airlines
Oct 29
IAD11:40 amWashington, D.C. Dulles Intl
3h 24m
1 stop
YOW3:04 pmOttawa
Nov 5
YOW6:50 amOttawa
3h 34m
1 stop
IAD10:24 amWashington, D.C. Dulles Intl
$329
Find similar

United Airlines flights from Washington, D.C. Dulles Intl Airport to Ottawa

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Ottawa flight tickets
United Airlines
Oct 18
IAD6:15 amWashington, D.C. Dulles Intl
6h 01m
1 stop
YOW12:16 pmOttawa
Oct 18
YOW2:45 pmOttawa
1h 43m
IAD4:28 pmWashington, D.C. Dulles Intl
$405
Find similar
United Airlines
Oct 18
IAD8:20 amWashington, D.C. Dulles Intl
5h 44m
1 stop
YOW2:04 pmOttawa
Oct 18
YOW5:50 pmOttawa
5h 08m
1 stop
IAD10:58 pmWashington, D.C. Dulles Intl
$408
Find similar
United Airlines
Nov 7
IAD10:12 pmWashington, D.C. Dulles Intl
1h 42m
YOW11:54 pmOttawa
Nov 9
YOW2:15 pmOttawa
1h 54m
IAD4:09 pmWashington, D.C. Dulles Intl
$424
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 September 15, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 11/20

11:40 am-12:42 am

1 stop13h 02m

Ottawa

Fri 11/28

5:40 am-5:14 pm

1 stop11h 34m

$319

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 11/22

1:45 pm-12:42 am

1 stop10h 57m

Ottawa

Fri 11/28

5:40 am-5:14 pm

1 stop11h 34m

$322

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 10/12

11:35 am-4:34 pm

1 stop4h 59m

Ottawa

Sun 10/19

8:35 am-3:06 pm

1 stop6h 31m

$325

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 10/9

11:35 am-4:34 pm

1 stop4h 59m

Ottawa

Thu 10/16

8:35 am-3:06 pm

1 stop6h 31m

$326

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 10/3

6:45 pm-12:40 am

1 stop29h 55m

Ottawa

Mon 10/6

9:35 am-3:06 pm

1 stop5h 31m

$327

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 10/29

11:40 am-3:04 pm

1 stop3h 24m

Ottawa

Wed 11/5

6:50 am-10:24 am

1 stop3h 34m

$329

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 11/21

6:30 pm-5:29 pm

1 stop22h 59m

Ottawa

Fri 11/28

5:40 am-5:14 pm

1 stop11h 34m

$330

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 10/18

6:15 am-12:16 pm

1 stop6h 01m

Ottawa

Sat 10/18

2:45 pm-4:28 pm

Nonstop1h 43m

$405

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 10/18

8:20 am-2:04 pm

1 stop5h 44m

Ottawa

Sat 10/18

5:50 pm-10:58 pm

1 stop5h 08m

$408

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 11/7

10:12 pm-11:54 pm

Nonstop1h 42m

Ottawa

Sun 11/9

2:15 pm-4:09 pm

Nonstop1h 54m

$424

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 Washington, D.C. Dulles Intl Airport 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 month to fly to Ottawa?

In general, March is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $297. The month of April is another great option to travel to Ottawa, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around $297.

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

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Ottawa is on a Saturday. Travelers who choose to depart for Ottawa on a Saturday will often find tickets for as low as $418. 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 $505.

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

In the morning is the cheapest time of day to fly from Washington, D.C. Dulles Intl Airport to Ottawa when you can find flight prices for as low as $438. Flying to Ottawa in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $678 on average. Flights to Ottawa from Washington, D.C. Dulles Intl Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Washington, D.C. Dulles Intl to Ottawa flight route?

Fly from Washington, D.C. Dulles Intl to Ottawa for the best Washington, D.C. Dulles Intl - Ottawa flight prices

What cabin class options are available on Washington, D.C. Dulles Intl to Ottawa flights?

There are 3 cabin classes available to choose from on Washington, D.C. Dulles Intl to Ottawa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Ottawa flights?

You could potentially save up to 38% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Ottawa flight.

How have Washington, D.C. Dulles Intl Airport to Ottawa flight prices changed over time?

As of September 2025, prices for Washington, D.C. Dulles Intl Airport to Ottawa flights are approximately 56% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. Dulles Intl Airport to Ottawa

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

Cheap Washington, D.C. Dulles Intl Airport to Ottawa (IAD to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Ottawa

Best Price Found

$279

Fastest flight time

1h 32m

Direct flights

Every day

Airports in Ottawa

1 airport
The best one-way flight to Ottawa from Washington, D.C. Dulles Intl Airport in the past 72 hours is $279. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Ottawa found on momondo in the last 72 hours is $553.
The fastest flight from Washington, D.C. Dulles Intl Airport to Ottawa takes 1h 32m
Direct flights go from Washington, D.C. Dulles Intl Airport to Ottawa every day.
There is 1 airport near Ottawa: Ottawa (YOW)
Search flight deals

  • How far is Washington, D.C. Dulles Intl to Ottawa by plane?

    There are 455.4 mi between Washington, D.C. Dulles Intl and Ottawa. By plane, this route typically takes 1h 42m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Ottawa Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Ottawa Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Ottawa Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Ottawa Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles 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 plane model from Washington, D.C. Dulles Intl Airport to Ottawa?

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Ottawa?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Ottawa

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom $179Free CancellationRating
7.9
363 reviews
Search Porter Airlines flights
Air CanadaPriceFrom $206Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $271Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights

  • United Airlines Flights From Washington, D.C. Dulles Intl Airport to Ottawa

    Across 21 United Airlines flights from Washington, D.C. Dulles Intl Airport to Ottawa this week, the average price was $467, with the best United Airlines deals starting from $271 round-trip. 8,929 users have rated United Airlines on momondo, with an average score of 7.4/10.

  • Air Canada Flights From Washington, D.C. Dulles Intl Airport to Ottawa

    Across 10,000 Air Canada reviews on momondo, the average score is 7.1/10. Air Canada flies from Washington, D.C. Dulles Intl Airport to Ottawa about 21 times each week, with ticket deals ranging from $206 to $470. Price data is based on momondo searches in the last 72 hours.

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 Washington, D.C. to Ottawa?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Ottawa for you.

Can I find flights from Washington, D.C. to Ottawa with flexible booking policies on momondo?

All flight searches from Washington, D.C. to Ottawa on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Ottawa?

Once all potential Washington, D.C. to Ottawa flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Ottawa from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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