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Cheap flights from Ottawa to Washington, D.C. from C$ 223

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 11/9. 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. (YOW-WAS)

Cheap round-trip flights

Porter Airlines Logo
9:35 a.m. - 3:06 p.m.YOW-IAD
5h 31m1 stop
Porter Airlines Logo
4:20 p.m. - 7:59 p.m.IAD-YOW
3h 39m1 stop
C$ 387Porter Airlines
Find Deal
Thu, 4 Sep - Sun, 7 Sep
Porter Airlines Logo
11:00 a.m. - 3:06 p.m.YOW-IAD
4h 06m1 stop
Porter Airlines Logo
4:20 p.m. - 8:34 p.m.IAD-YOW
4h 14m1 stop
C$ 390Porter Airlines
Find Deal
Tue, 2 Sep - Wed, 10 Sep
Air Canada Logo
6:00 a.m. - 10:20 a.m.YOW-DCA
4h 20m1 stop
Air Canada Logo
6:00 a.m. - 10:28 a.m.DCA-YOW
4h 28m1 stop
C$ 396Air Canada
Find Deal
Thu, 2 Oct - Sun, 5 Oct
Air Canada Logo
6:00 a.m. - 10:20 a.m.YOW-DCA
4h 20m1 stop
Air Canada Logo
12:55 p.m. - 2:26 p.m.DCA-YOW
1h 31mdirect
C$ 402Air Canada
Find Deal
Thu, 2 Oct - Sun, 5 Oct
Logo
7:00 a.m. - 11:25 p.m.YOW-BWI
16h 25m2 stops
Logo
6:50 a.m. - 5:20 p.m.BWI-YOW
10h 30m1 stop
C$ 475
Find Deal
Thu, 4 Sep - Sun, 7 Sep
Logo
7:00 a.m. - 6:24 p.m.YOW-IAD
11h 24m2 stops
Logo
4:20 p.m. - 12:22 a.m.IAD-YOW
8h 02m1 stop
C$ 482
Find Deal
Mon, 22 Sep - Thu, 25 Sep
WestJet Logo
6:00 a.m. - 5:50 p.m.YOW-IAD
11h 50m1 stop
WestJet Logo
6:45 p.m. - 4:19 p.m.IAD-YOW
21h 34m2 stops
C$ 692WestJet
Find Deal
Fri, 19 Sep - Mon, 22 Sep
WestJet Logo
6:00 a.m. - 5:50 p.m.YOW-IAD
11h 50m1 stop
WestJet Logo
6:45 p.m. - 4:19 p.m.IAD-YOW
21h 34m2 stops
C$ 694WestJet
Find Deal
Fri, 19 Sep - Mon, 22 Sep
United Airlines Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
United Airlines Logo
12:35 p.m. - 2:13 p.m.IAD-YOW
1h 38mdirect
C$ 708United Airlines
Find Deal
Sun, 14 Sep - Tue, 16 Sep
United Airlines Logo
6:33 a.m. - 9:42 p.m.YOW-BWI
15h 09m1 stop
United Airlines Logo
6:15 a.m. - 9:35 p.m.BWI-YOW
15h 20m1 stop
C$ 785United Airlines
Find Deal
Mon, 22 Sep - Tue, 23 Sep

Porter Airlines flights from Ottawa to Washington, D.C.

Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
Porter Airlines
4 Sep
YOW9:35 a.m.Ottawa
5h 31m
1 stop
IAD3:06 p.m.Washington, D.C. Dulles Intl
7 Sep
IAD4:20 p.m.Washington, D.C. Dulles Intl
3h 39m
1 stop
YOW7:59 p.m.Ottawa
C$ 387
Find similar
Porter Airlines
2 Sep
YOW11:00 a.m.Ottawa
4h 06m
1 stop
IAD3:06 p.m.Washington, D.C. Dulles Intl
10 Sep
IAD4:20 p.m.Washington, D.C. Dulles Intl
4h 14m
1 stop
YOW8:34 p.m.Ottawa
C$ 390
Find similar
Porter Airlines
10 Sep
YOW9:35 a.m.Ottawa
5h 31m
1 stop
IAD3:06 p.m.Washington, D.C. Dulles Intl
14 Sep
IAD11:35 a.m.Washington, D.C. Dulles Intl
4h 59m
1 stop
YOW4:34 p.m.Ottawa
C$ 392
Find similar

United Airlines flights from Ottawa to Washington, D.C.

Our best United Airlines deals on Ottawa to Washington, D.C. flight tickets
United Airlines
14 Sep
YOW7:29 p.m.Ottawa
1h 43m
IAD9:12 p.m.Washington, D.C. Dulles Intl
16 Sep
IAD12:35 p.m.Washington, D.C. Dulles Intl
1h 38m
YOW2:13 p.m.Ottawa
C$ 708
Find similar
United Airlines
22 Sep
YOW6:33 a.m.Ottawa
15h 09m
1 stop
BWI9:42 p.m.Baltimore/Washington
23 Sep
BWI6:15 a.m.Baltimore/Washington
15h 20m
1 stop
YOW9:35 p.m.Ottawa
C$ 785
Find similar
United Airlines
22 Sep
YOW6:33 a.m.Ottawa
27h 22m
1 stop
BWI9:55 a.m.Baltimore/Washington
23 Sep
BWI5:30 p.m.Baltimore/Washington
18h 15m
2 stops
YOW11:45 a.m.Ottawa
C$ 790
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Washington, D.C. 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 14 August 2025.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 4/9

9:35 a.m.-3:06 p.m.

1 stop5h 31m

Washington, D.C. Dulles Intl

Sun 7/9

4:20 p.m.-7:59 p.m.

1 stop3h 39m

C$ 387

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 2/9

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

1 stop4h 06m

Washington, D.C. Dulles Intl

Wed 10/9

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

1 stop4h 14m

C$ 390

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 2/10

6:00 a.m.-10:20 a.m.

1 stop4h 20m

Washington, D.C. Reagan-National

Sun 5/10

6:00 a.m.-10:28 a.m.

1 stop4h 28m

C$ 396

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 2/10

6:00 a.m.-10:20 a.m.

1 stop4h 20m

Washington, D.C. Reagan-National

Sun 5/10

12:55 p.m.-2:26 p.m.

Nonstop1h 31m

C$ 402

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Thu 4/9

7:00 a.m.-11:25 p.m.

2 stops16h 25m

Baltimore/Washington

Sun 7/9

6:50 a.m.-5:20 p.m.

1 stop10h 30m

C$ 475

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 22/9

7:00 a.m.-6:24 p.m.

2 stops11h 24m

Washington, D.C. Dulles Intl

Thu 25/9

4:20 p.m.-12:22 a.m.

1 stop8h 02m

C$ 482

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 19/9

6:00 a.m.-5:50 p.m.

1 stop11h 50m

Washington, D.C. Dulles Intl

Mon 22/9

6:45 p.m.-4:19 p.m.

2 stops21h 34m

C$ 692

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 19/9

6:00 a.m.-5:50 p.m.

1 stop11h 50m

Washington, D.C. Dulles Intl

Mon 22/9

6:45 p.m.-4:19 p.m.

2 stops21h 34m

C$ 694

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 14/9

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

Nonstop1h 43m

Washington, D.C. Dulles Intl

Tue 16/9

12:35 p.m.-2:13 p.m.

Nonstop1h 38m

C$ 708

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Mon 22/9

6:33 a.m.-9:42 p.m.

1 stop15h 09m

Baltimore/Washington

Tue 23/9

6:15 a.m.-9:35 p.m.

1 stop15h 20m

C$ 785

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.

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 Ottawa and Washington, D.C.?

What is the cheapest month to fly to Washington, D.C.?

If you aren’t able to travel during the month of March, then book flights to Washington, D.C. from Ottawa during April instead. Flights to Washington, D.C. in April, while not as cheap as those in March, still average around C$ 414.

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

The cheapest day to depart from Ottawa to Washington, D.C. is on a Friday. Travellers who choose to depart for Washington, D.C. on a Friday will often find tickets for as low as C$ 829. The most expensive day to fly to Washington, D.C. is Sunday, with ticket prices averaging around C$ 1,020.

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

In the afternoon is the cheapest time of day to fly from Ottawa to Washington, D.C. when you can find flight prices for as low as C$ 437. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Washington, D.C., so prices are often more expensive at around C$ 1,107 per ticket.

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

Fly from Ottawa to Washington, D.C. Reagan-National for the best Ottawa - Washington, D.C. flight prices

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

You are more likely to see cheaper flights to Washington, D.C. from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around C$ 512 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Ottawa for as low as C$ 344 on momondo.

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

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

No. A direct flight is the cheapest option for a flight between Ottawa to Washington, D.C..

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

As of August 2025, prices for Ottawa to Washington, D.C. flights are approximately 12% more expensive when compared to flights at the same time last year.

When to book flights from Ottawa to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Ottawa to Washington, D.C. 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. (YOW to WAS) flight deals and tips

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

Best price found

C$ 223

Fastest flight time

1h 38m

Direct flights

Every day

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from Ottawa in the past 72 hours is C$ 223. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is C$ 387.
The fastest flight from Ottawa to Washington, D.C. takes 1h 38m
Direct flights go from Ottawa to Washington, D.C. every day.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)
Search flight deals

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

    Washington, D.C. is 731.6 km away from Ottawa. A reasonable flight in good conditions will take 1h 38m.

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

    Prices for flights from Ottawa Airport to Washington, D.C. are updated daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to Washington, D.C..

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

    The travel and health documents required for your trip to Washington, D.C. 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 Washington, D.C.. 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 Ottawa to Washington, D.C.?

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

Best airlines flying from Ottawa to Washington, D.C.

Compare and see reviews for airlines that fly from Ottawa to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom C$ 331Free CancellationRating
8.0
332 reviews
Search Porter Airlines flights
United AirlinesPriceFrom C$ 333Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 340Free CancellationRating
7.1
9,949 reviews
Search Air Canada flights

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

    United Airlines flies from Ottawa to Washington, D.C. around 24 times per week, with 8,916 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Ottawa to Washington, D.C. in the last 72 hours was C$ 242 (round-trip), much lower than the average airfare cost of C$ 505 for United Airlines flights on this route.

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

    Another popular option for Ottawa to Washington, D.C. flights is Air Canada (7.1/10, 9,949 ratings). Air Canada flies from Ottawa to Washington, D.C. around 24 times per week, with deals starting from C$ 247 round-trip and rising to an average price of around C$ 393.

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

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

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 allows you to filter the results for Ottawa to Washington, D.C. flights to just show those with flexible booking policies.

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?

If you are not ready to book a flight from Ottawa to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 36.1 km from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport