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Cheap flights from Ottawa to Washington, D.C. from C$ 272

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Washington, D.C. departing on 25/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Porter Airlines Logo
11:00 a.m. - 5:14 p.m.
YOW
-
IAD
6h 14m
1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.
IAD
-
YOW
5h 49m
1 stop
C$ 406Porter Airlines
Thu, 2 Apr - Sun, 5 Apr
Porter Airlines Logo
12:10 p.m. - 5:14 p.m.
YOW
-
IAD
5h 04m
1 stop
Porter Airlines Logo
4:05 p.m. - 9:44 p.m.
IAD
-
YOW
5h 39m
1 stop
C$ 407Porter Airlines
Sun, 26 Apr - Fri, 1 May
Porter Airlines Logo
11:00 a.m. - 5:14 p.m.
YOW
-
IAD
6h 14m
1 stop
Porter Airlines Logo
6:00 p.m. - 10:29 p.m.
IAD
-
YOW
4h 29m
1 stop
C$ 409Porter Airlines
Thu, 2 Apr - Sun, 12 Apr
Porter Airlines Logo
6:45 a.m. - 10:54 a.m.
YOW
-
IAD
4h 09m
1 stop
Porter Airlines Logo
6:00 p.m. - 10:29 p.m.
IAD
-
YOW
4h 29m
1 stop
C$ 410Porter Airlines
Wed, 1 Apr - Fri, 10 Apr
Porter Airlines Logo
11:00 a.m. - 3:21 p.m.
YOW
-
IAD
4h 21m
1 stop
Porter Airlines Logo
11:30 a.m. - 5:54 p.m.
IAD
-
YOW
6h 24m
1 stop
C$ 411Porter Airlines
Mon, 4 May - Sun, 10 May
Porter Airlines Logo
12:10 p.m. - 5:14 p.m.
YOW
-
IAD
5h 04m
1 stop
Porter Airlines Logo
11:40 a.m. - 5:04 p.m.
IAD
-
YOW
5h 24m
1 stop
C$ 413Porter Airlines
Sun, 26 Apr - Thu, 30 Apr
Porter Airlines Logo
11:00 a.m. - 5:14 p.m.
YOW
-
IAD
6h 14m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:04 p.m.
IAD
-
YOW
3h 24m
1 stop
C$ 414Porter Airlines
Thu, 2 Apr - Sun, 5 Apr
Porter Airlines Logo
11:00 a.m. - 5:14 p.m.
YOW
-
IAD
6h 14m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:04 p.m.
IAD
-
YOW
3h 24m
1 stop
C$ 415Porter Airlines
Thu, 2 Apr - Sun, 5 Apr
Porter Airlines Logo
11:00 a.m. - 3:21 p.m.
YOW
-
IAD
4h 21m
1 stop
Porter Airlines Logo
4:05 p.m. - 8:04 p.m.
IAD
-
YOW
3h 59m
1 stop
C$ 432Porter Airlines
Thu, 4 Jun - Sun, 7 Jun
Porter Airlines Logo
11:00 a.m. - 3:16 p.m.
YOW
-
IAD
4h 16m
1 stop
Porter Airlines Logo
4:00 p.m. - 8:04 p.m.
IAD
-
YOW
4h 04m
1 stop
C$ 433Porter Airlines
Sun, 12 Jul - Fri, 17 Jul

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

Our best Porter Airlines deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
Porter Airlines
2 Apr
YOW11:00 a.m.Ottawa
6h 14m
1 stop
IAD5:14 p.m.Washington, D.C. Dulles Intl
5 Apr
IAD11:40 a.m.Washington, D.C. Dulles Intl
5h 49m
1 stop
YOW5:29 p.m.Ottawa
C$ 406
Porter Airlines
4 Apr
YOW8:40 a.m.Ottawa
4h 19m
1 stop
IAD12:59 p.m.Washington, D.C. Dulles Intl
11 Apr
IAD1:45 p.m.Washington, D.C. Dulles Intl
3h 44m
1 stop
YOW5:29 p.m.Ottawa
C$ 407
Porter Airlines
2 Apr
YOW11:00 a.m.Ottawa
6h 14m
1 stop
IAD5:14 p.m.Washington, D.C. Dulles Intl
12 Apr
IAD6:00 p.m.Washington, D.C. Dulles Intl
4h 29m
1 stop
YOW10:29 p.m.Ottawa
C$ 409

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

Our best United Airlines deals on Ottawa to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
19 Apr
YOW7:30 p.m.Ottawa
1h 48m
IAD9:18 p.m.Washington, D.C. Dulles Intl
20 Apr
IAD8:33 a.m.Washington, D.C. Dulles Intl
13h 02m
2 stops
YOW9:35 p.m.Ottawa
C$ 447
United Airlines
19 Apr
YOW5:50 p.m.Ottawa
5h 35m
1 stop
IAD11:25 p.m.Washington, D.C. Dulles Intl
20 Apr
IAD8:15 a.m.Washington, D.C. Dulles Intl
1h 48m
YOW10:03 a.m.Ottawa
C$ 458
United Airlines
11 Apr
YOW5:50 p.m.Ottawa
5h 35m
1 stop
IAD11:25 p.m.Washington, D.C. Dulles Intl
12 Apr
IAD8:15 a.m.Washington, D.C. Dulles Intl
1h 48m
YOW10:03 a.m.Ottawa
C$ 459

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Washington, D.C. Dulles Intl Airport 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 96,600 searches. Data last updated 11 March 2026.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/4

11:00 a.m.-5:14 p.m.

1 stop6h 14m

Washington, D.C. Dulles Intl

Sun 5/4

11:40 a.m.-5:29 p.m.

1 stop5h 49m

C$ 406

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 26/4

12:10 p.m.-5:14 p.m.

1 stop5h 04m

Washington, D.C. Dulles Intl

Fri 1/5

4:05 p.m.-9:44 p.m.

1 stop5h 39m

C$ 407

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/4

11:00 a.m.-5:14 p.m.

1 stop6h 14m

Washington, D.C. Dulles Intl

Sun 12/4

6:00 p.m.-10:29 p.m.

1 stop4h 29m

C$ 409

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 1/4

6:45 a.m.-10:54 a.m.

1 stop4h 09m

Washington, D.C. Dulles Intl

Fri 10/4

6:00 p.m.-10:29 p.m.

1 stop4h 29m

C$ 410

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 4/5

11:00 a.m.-3:21 p.m.

1 stop4h 21m

Washington, D.C. Dulles Intl

Sun 10/5

11:30 a.m.-5:54 p.m.

1 stop6h 24m

C$ 411

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 26/4

12:10 p.m.-5:14 p.m.

1 stop5h 04m

Washington, D.C. Dulles Intl

Thu 30/4

11:40 a.m.-5:04 p.m.

1 stop5h 24m

C$ 413

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/4

11:00 a.m.-5:14 p.m.

1 stop6h 14m

Washington, D.C. Dulles Intl

Sun 5/4

11:40 a.m.-3:04 p.m.

1 stop3h 24m

C$ 414

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/4

11:00 a.m.-5:14 p.m.

1 stop6h 14m

Washington, D.C. Dulles Intl

Sun 5/4

11:40 a.m.-3:04 p.m.

1 stop3h 24m

C$ 415
Quickest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 4/6

11:00 a.m.-3:21 p.m.

1 stop4h 21m

Washington, D.C. Dulles Intl

Sun 7/6

4:05 p.m.-8:04 p.m.

1 stop3h 59m

C$ 432

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 12/7

11:00 a.m.-3:16 p.m.

1 stop4h 16m

Washington, D.C. Dulles Intl

Fri 17/7

4:00 p.m.-8:04 p.m.

1 stop4h 04m

C$ 433

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 Washington, D.C. from

How to get the cheapest flight ticket from Ottawa to Washington, D.C. Dulles Intl Airport

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 Washington, D.C. Dulles Intl Airport?

The cheapest month to fly to Washington, D.C. Dulles Intl Airport from Ottawa is in January. Flight prices, which tend to average around C$ 415, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. Dulles Intl Airport in January, then you should wait until July to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 417.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

According to our data, Saturday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from Ottawa. The lowest ticket price found for a Saturday departure recently was C$ 838. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Washington, D.C. Dulles Intl Airport on Monday is C$ 942.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our most recent data shows that the best time of day to fly to Washington, D.C. Dulles Intl Airport is in the morning. Flights from Ottawa to Washington, D.C. Dulles Intl Airport during this time can be as low as C$ 762. At noon is when there is more demand to fly to Washington, D.C. Dulles Intl Airport, so prices are often more expensive at around C$ 1,075 per ticket.

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

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

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

There are 4 cabin classes available to choose from on Ottawa to Washington, D.C. Dulles Intl 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 Ottawa to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 61% on your flight if you consider stops on a Ottawa to Washington, D.C. Dulles Intl Airport flight.

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

As of March 2026, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 6% cheaper when compared to flights at the same time last year.

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

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

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

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

Best price found

C$ 297

Fastest flight time

1h 43m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Ottawa in the past 72 hours is C$ 297. The best round-trip flight deal from Ottawa to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is C$ 565.
The fastest flight from Ottawa to Washington, D.C. Dulles Intl Airport takes 1h 43m
Direct flights go from Ottawa to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

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

    Washington, D.C. Dulles Intl is 732.9 km away from Ottawa. 1h 43m is a normal flight duration for this route.

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

    Prices for flights from Ottawa Airport to Washington, D.C. Dulles Intl Airport refresh daily.

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

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

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

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

Compare and see reviews for airlines that fly from Ottawa to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom C$ 310Free CancellationRating
8.0
423 reviews
Search Porter Airlines flights
United AirlinesPriceFrom C$ 352Free CancellationRating
7.4
9,418 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 360Free CancellationRating
7.1
10,800 reviews
Search Air Canada flights

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

    United Airlines operates around 20 flights from Ottawa to Washington, D.C. Dulles Intl Airport every week. The average price of these flights found in the last 72 hours has been C$ 591, but momondo users have found United Airlines deals from Ottawa to Washington, D.C. Dulles Intl Airport from as low as C$ 352 round-trip. United Airlines has been scored 7.4/10 in 9,418 reviews.

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

    Air Canada is also a popular choice for this route. Air Canada flight deals for Ottawa to Washington, D.C. Dulles Intl Airport start from as low as C$ 360 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around C$ 605. Air Canada operates 21 flights to Washington, D.C. Dulles Intl Airport from Ottawa in an average week. Users have rated it 7.1/10 across 10,800 reviews.

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
Chantilly
Gaithersburg
Fairfax
Linthicum Heights
Bethesda
National Harbor
Reston
Laurel
Herndon
Winchester
Arlington
Leesburg
Fredericksburg
Ashburn
Manassas
Woodbridge
Silver Spring
Rockville

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Washington, D.C.?

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

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Ottawa with this policy.

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

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 Washington, D.C. from Ottawa.

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

Price alerts on flights to Washington, D.C. from Ottawa 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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