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Cheap flights from Ottawa to Washington, D.C. from C$ 201

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 12/9. 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 Ottawa to Washington, D.C.

Cheap round-trip flights

Porter Airlines Logo
8:35 a.m. - 3:06 p.m.YOW-IAD
6h 31m1 stop
Porter Airlines Logo
4:20 p.m. - 8:34 p.m.IAD-YOW
4h 14m1 stop
C$ 328Porter Airlines
Find Deal
Sun, 14 Sep - Fri, 19 Sep
Porter Airlines Logo
9:35 a.m. - 2:56 p.m.YOW-IAD
5h 21m1 stop
Porter Airlines Logo
11:35 a.m. - 5:04 p.m.IAD-YOW
5h 29m1 stop
C$ 350Porter Airlines
Find Deal
Sat, 30 Aug - Thu, 4 Sep
Lufthansa Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
Lufthansa Logo
6:20 a.m. - 11:45 a.m.IAD-YOW
5h 25m1 stop
C$ 394Lufthansa
Find Deal
Sat, 13 Sep - Sun, 14 Sep
United Airlines Logo
2:48 p.m. - 8:41 p.m.YOW-IAD
5h 53m1 stop
United Airlines Logo
8:16 a.m. - 9:58 a.m.IAD-YOW
1h 42mdirect
C$ 399United Airlines
Find Deal
Sat, 13 Sep - Sun, 14 Sep
United Airlines Logo
2:45 p.m. - 4:28 p.m.YOW-IAD
1h 43mdirect
United Airlines Logo
8:16 a.m. - 9:58 a.m.IAD-YOW
1h 42mdirect
C$ 423United Airlines
Find Deal
Thu, 21 Aug - Thu, 28 Aug
Air Canada Logo
2:50 p.m. - 8:59 p.m.YOW-IAD
6h 09m1 stop
Air Canada Logo
9:00 a.m. - 3:23 p.m.IAD-YOW
6h 23m1 stop
C$ 446Air Canada
Find Deal
Thu, 15 Jan - Mon, 19 Jan
Air Canada Logo
5:15 a.m. - 9:37 a.m.YOW-IAD
4h 22m1 stop
Air Canada Logo
9:35 a.m. - 1:51 p.m.IAD-YOW
4h 16m1 stop
C$ 448Air Canada
Find Deal
Wed, 27 Aug - Wed, 3 Sep
Lufthansa Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
Lufthansa Logo
8:16 a.m. - 9:58 a.m.IAD-YOW
1h 42mdirect
C$ 450Lufthansa
Find Deal
Thu, 21 Aug - Mon, 25 Aug
Logo
5:55 a.m. - 3:06 p.m.YOW-IAD
9h 11m1 stop
Logo
11:35 a.m. - 6:09 p.m.IAD-YOW
6h 34m1 stop
C$ 480
Find Deal
Tue, 23 Sep - Fri, 26 Sep
Logo
9:35 a.m. - 2:56 p.m.YOW-IAD
5h 21m1 stop
Logo
10:20 a.m. - 3:05 p.m.IAD-YOW
4h 45m1 stop
C$ 505
Find Deal
Mon, 18 Aug - Wed, 20 Aug

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
14 Sep
YOW8:35 a.m.Ottawa
6h 31m
1 stop
IAD3:06 p.m.Washington, D.C. Dulles Intl
19 Sep
IAD4:20 p.m.Washington, D.C. Dulles Intl
4h 14m
1 stop
YOW8:34 p.m.Ottawa
C$ 328
Find similar
Porter Airlines
30 Aug
YOW9:35 a.m.Ottawa
5h 21m
1 stop
IAD2:56 p.m.Washington, D.C. Dulles Intl
4 Sep
IAD11:35 a.m.Washington, D.C. Dulles Intl
5h 29m
1 stop
YOW5:04 p.m.Ottawa
C$ 350
Find similar
Porter Airlines
21 Aug
YOW11:00 a.m.Ottawa
3h 56m
1 stop
IAD2:56 p.m.Washington, D.C. Dulles Intl
25 Aug
IAD4:10 p.m.Washington, D.C. Dulles Intl
3h 28m
1 stop
YOW7:38 p.m.Ottawa
C$ 381
Find similar

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
13 Sep
YOW2:48 p.m.Ottawa
5h 53m
1 stop
IAD8:41 p.m.Washington, D.C. Dulles Intl
14 Sep
IAD8:16 a.m.Washington, D.C. Dulles Intl
1h 42m
YOW9:58 a.m.Ottawa
C$ 399
Find similar
United Airlines
21 Aug
YOW2:45 p.m.Ottawa
1h 43m
IAD4:28 p.m.Washington, D.C. Dulles Intl
28 Aug
IAD8:16 a.m.Washington, D.C. Dulles Intl
1h 42m
YOW9:58 a.m.Ottawa
C$ 423
Find similar
United Airlines
21 Aug
YOW2:45 p.m.Ottawa
1h 43m
IAD4:28 p.m.Washington, D.C. Dulles Intl
25 Aug
IAD8:16 a.m.Washington, D.C. Dulles Intl
1h 42m
YOW9:58 a.m.Ottawa
C$ 428
Find similar

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 31 July 2025.
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

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 14/9

8:35 a.m.-3:06 p.m.

1 stop6h 31m

Washington, D.C. Dulles Intl

Fri 19/9

4:20 p.m.-8:34 p.m.

1 stop4h 14m

C$ 328

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 30/8

9:35 a.m.-2:56 p.m.

1 stop5h 21m

Washington, D.C. Dulles Intl

Thu 4/9

11:35 a.m.-5:04 p.m.

1 stop5h 29m

C$ 350

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 13/9

7:29 p.m.-9:12 p.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 14/9

6:20 a.m.-11:45 a.m.

1 stop5h 25m

C$ 394

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 13/9

2:48 p.m.-8:41 p.m.

1 stop5h 53m

Washington, D.C. Dulles Intl

Sun 14/9

8:16 a.m.-9:58 a.m.

Nonstop1h 42m

C$ 399

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 21/8

2:45 p.m.-4:28 p.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Thu 28/8

8:16 a.m.-9:58 a.m.

Nonstop1h 42m

C$ 423

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 15/1

2:50 p.m.-8:59 p.m.

1 stop6h 09m

Washington, D.C. Dulles Intl

Mon 19/1

9:00 a.m.-3:23 p.m.

1 stop6h 23m

C$ 446

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 27/8

5:15 a.m.-9:37 a.m.

1 stop4h 22m

Washington, D.C. Dulles Intl

Wed 3/9

9:35 a.m.-1:51 p.m.

1 stop4h 16m

C$ 448

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 21/8

7:29 p.m.-9:12 p.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Mon 25/8

8:16 a.m.-9:58 a.m.

Nonstop1h 42m

C$ 450

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 23/9

5:55 a.m.-3:06 p.m.

1 stop9h 11m

Washington, D.C. Dulles Intl

Fri 26/9

11:35 a.m.-6:09 p.m.

1 stop6h 34m

C$ 480

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 18/8

9:35 a.m.-2:56 p.m.

1 stop5h 21m

Washington, D.C. Dulles Intl

Wed 20/8

10:20 a.m.-3:05 p.m.

1 stop4h 45m

C$ 505

Flights are sorted by cheapest round-trip flights 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 April. Flight prices, which tend to average around C$ 430, 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 April, then you should wait until March to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 439.

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

According to our data, Friday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from Ottawa. The lowest ticket price found for a Friday departure recently was C$ 883. 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 Sunday as prices are generally higher than usual. According to our data, the average ticket price to Washington, D.C. Dulles Intl Airport on Sunday is C$ 1,078.

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 afternoon. Flights from Ottawa to Washington, D.C. Dulles Intl Airport during this time can be as low as C$ 436. 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$ 1,113 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

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around C$ 511 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Ottawa for as low as C$ 383 on momondo.

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 60% 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 July 2025, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 13% more expensive 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$ 201

Fastest flight time

1h 35m

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$ 201. 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$ 328.
The fastest flight from Ottawa to Washington, D.C. Dulles Intl Airport takes 1h 35m
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$ 358Free CancellationRating
8.0
318 reviews
Search Porter Airlines flights
Air CanadaPriceFrom C$ 367Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 452Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

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

    United Airlines operates around 21 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$ 460, but momondo users have found United Airlines deals from Ottawa to Washington, D.C. Dulles Intl Airport from as low as C$ 327 round-trip. United Airlines has been scored 7.4/10 in 8,900 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$ 265 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around C$ 410. 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 9,851 reviews.

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

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

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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