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Cheap flights from Ottawa to Washington, D.C. from C$ 231

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 26/9. 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

United Airlines Logo
5:50 p.m. - 10:33 p.m.YOW-IAD
4h 43m1 stop
United Airlines Logo
8:16 a.m. - 9:58 a.m.IAD-YOW
1h 42mdirect
C$ 419United Airlines
Find Deal
Fri, 3 Oct - Sat, 4 Oct
Porter Airlines Logo
11:00 a.m. - 3:06 p.m.YOW-IAD
4h 06m1 stop
Porter Airlines Logo
11:35 a.m. - 4:34 p.m.IAD-YOW
4h 59m1 stop
C$ 429Porter Airlines
Find Deal
Fri, 3 Oct - Sun, 5 Oct
United Airlines Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
United Airlines Logo
8:25 a.m. - 9:09 p.m.IAD-YOW
12h 44m2 stops
C$ 432United Airlines
Find Deal
Fri, 3 Oct - Sat, 4 Oct
Porter Airlines Logo
12:10 p.m. - 5:14 p.m.YOW-IAD
5h 04m1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.IAD-YOW
5h 49m1 stop
C$ 436Porter Airlines
Find Deal
Tue, 16 Dec - Mon, 12 Jan
Porter Airlines Logo
7:00 a.m. - 10:16 a.m.YOW-IAD
3h 16m1 stop
Porter Airlines Logo
4:20 p.m. - 8:34 p.m.IAD-YOW
4h 14m1 stop
C$ 437Porter Airlines
Find Deal
Mon, 6 Oct - Fri, 17 Oct
Porter Airlines Logo
11:00 a.m. - 3:06 p.m.YOW-IAD
4h 06m1 stop
Porter Airlines Logo
11:35 a.m. - 4:34 p.m.IAD-YOW
4h 59m1 stop
C$ 442Porter Airlines
Find Deal
Fri, 3 Oct - Sun, 5 Oct
Porter Airlines Logo
8:40 a.m. - 5:14 p.m.YOW-IAD
8h 34m1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.IAD-YOW
5h 49m1 stop
C$ 443Porter Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Lufthansa Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
Lufthansa Logo
6:15 a.m. - 11:45 a.m.IAD-YOW
5h 30m1 stop
C$ 479Lufthansa
Find Deal
Fri, 10 Oct - Sun, 12 Oct
Air Canada Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
Air Canada Logo
8:16 a.m. - 9:58 a.m.IAD-YOW
1h 42mdirect
C$ 550Air Canada
Find Deal
Sat, 11 Oct - Sat, 18 Oct
Air Canada Logo
7:30 p.m. - 9:22 p.m.YOW-IAD
1h 52mdirect
Air Canada Logo
12:42 p.m. - 2:27 p.m.IAD-YOW
1h 45mdirect
C$ 551Air Canada
Find Deal
Thu, 30 Oct - Thu, 6 Nov

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
3 Oct
YOW11:00 a.m.Ottawa
4h 06m
1 stop
IAD3:06 p.m.Washington, D.C. Dulles Intl
5 Oct
IAD11:35 a.m.Washington, D.C. Dulles Intl
4h 59m
1 stop
YOW4:34 p.m.Ottawa
C$ 429
Find similar
Porter Airlines
16 Dec
YOW12:10 p.m.Ottawa
5h 04m
1 stop
IAD5:14 p.m.Washington, D.C. Dulles Intl
12 Jan
IAD11:40 a.m.Washington, D.C. Dulles Intl
5h 49m
1 stop
YOW5:29 p.m.Ottawa
C$ 436
Find similar
Porter Airlines
6 Oct
YOW7:00 a.m.Ottawa
3h 16m
1 stop
IAD10:16 a.m.Washington, D.C. Dulles Intl
17 Oct
IAD4:20 p.m.Washington, D.C. Dulles Intl
4h 14m
1 stop
YOW8:34 p.m.Ottawa
C$ 437
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
3 Oct
YOW5:50 p.m.Ottawa
4h 43m
1 stop
IAD10:33 p.m.Washington, D.C. Dulles Intl
4 Oct
IAD8:16 a.m.Washington, D.C. Dulles Intl
1h 42m
YOW9:58 a.m.Ottawa
C$ 419
Find similar
United Airlines
3 Oct
YOW7:29 p.m.Ottawa
1h 43m
IAD9:12 p.m.Washington, D.C. Dulles Intl
4 Oct
IAD8:25 a.m.Washington, D.C. Dulles Intl
12h 44m
2 stops
YOW9:09 p.m.Ottawa
C$ 432
Find similar
United Airlines
3 Oct
YOW7:29 p.m.Ottawa
1h 43m
IAD9:12 p.m.Washington, D.C. Dulles Intl
4 Oct
IAD6:15 a.m.Washington, D.C. Dulles Intl
6h 01m
1 stop
YOW12:16 p.m.Ottawa
C$ 468
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 15 September 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

Fri 3/10

5:50 p.m.-10:33 p.m.

1 stop4h 43m

Washington, D.C. Dulles Intl

Sat 4/10

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

Nonstop1h 42m

C$ 419

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 3/10

11:00 a.m.-3:06 p.m.

1 stop4h 06m

Washington, D.C. Dulles Intl

Sun 5/10

11:35 a.m.-4:34 p.m.

1 stop4h 59m

C$ 429

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 3/10

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

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 4/10

8:25 a.m.-9:09 p.m.

2 stops12h 44m

C$ 432

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 16/12

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

1 stop5h 04m

Washington, D.C. Dulles Intl

Mon 12/1

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

1 stop5h 49m

C$ 436

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 6/10

7:00 a.m.-10:16 a.m.

1 stop3h 16m

Washington, D.C. Dulles Intl

Fri 17/10

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

1 stop4h 14m

C$ 437

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 3/10

11:00 a.m.-3:06 p.m.

1 stop4h 06m

Washington, D.C. Dulles Intl

Sun 5/10

11:35 a.m.-4:34 p.m.

1 stop4h 59m

C$ 442

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 30/10

8:40 a.m.-5:14 p.m.

1 stop8h 34m

Washington, D.C. Dulles Intl

Thu 6/11

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

1 stop5h 49m

C$ 443

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/10

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

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 12/10

6:15 a.m.-11:45 a.m.

1 stop5h 30m

C$ 479

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 11/10

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

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 18/10

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

Nonstop1h 42m

C$ 550

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 30/10

7:30 p.m.-9:22 p.m.

Nonstop1h 52m

Washington, D.C. Dulles Intl

Thu 6/11

12:42 p.m.-2:27 p.m.

Nonstop1h 45m

C$ 551

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 July 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$ 879. 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 Thursday as prices are generally higher than usual. According to our data, the average ticket price to Washington, D.C. Dulles Intl Airport on Thursday is C$ 1,053.

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$ 1,103 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$ 554 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$ 346 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 66% 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 September 2025, prices for Ottawa to Washington, D.C. Dulles Intl Airport flights are approximately 9% 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$ 360

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$ 360. 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$ 705.
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$ 354Free CancellationRating
7.9
363 reviews
Search Porter Airlines flights
Air CanadaPriceFrom C$ 367Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 452Free CancellationRating
7.4
8,929 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$ 492, 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 8,929 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$ 415. 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 10,000 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
Linthicum Heights
Bethesda
Silver Spring
Herndon
Reston
Fairfax
Laurel
Chantilly
Capitol Heights
Winchester
Arlington
Manassas
Fredericksburg
Ashburn
Woodbridge
Rockville
McLean
National Harbor

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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