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Cheap flights from Ottawa to Washington, D.C. from C$ 275

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 4/6. 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

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Find the cheapest flights from Ottawa to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:05 a.m. - 4:32 p.m.
YOW
-
IAD
10h 27m
1 stop
United Airlines Logo
10:10 p.m. - 11:54 p.m.
IAD
-
YOW
1h 44mdirect
C$ 421United Airlines
Tue, 9 Jun - Tue, 9 Jun
United Airlines Logo
6:00 a.m. - 7:44 a.m.
YOW
-
IAD
1h 44mdirect
United Airlines Logo
5:42 p.m. - 10:05 p.m.
IAD
-
YOW
4h 23m
1 stop
C$ 461United Airlines
Mon, 27 Jul - Mon, 27 Jul
Porter Airlines Logo
11:00 a.m. - 3:16 p.m.
YOW
-
IAD
4h 16m
1 stop
Porter Airlines Logo
11:30 a.m. - 5:54 p.m.
IAD
-
YOW
6h 24m
1 stop
C$ 472Porter Airlines
Fri, 24 Jul - Wed, 29 Jul
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$ 475Porter Airlines
Wed, 3 Jun - Wed, 10 Jun
United Airlines Logo
6:05 a.m. - 10:23 a.m.
YOW
-
DCA
4h 18m
1 stop
United Airlines Logo
12:45 p.m. - 2:17 p.m.
DCA
-
YOW
1h 32mdirect
C$ 475United Airlines
Thu, 11 Jun - Thu, 11 Jun
Air Canada Logo
9:05 a.m. - 3:38 p.m.
YOW
-
DCA
6h 33m
1 stop
Air Canada Logo
12:40 p.m. - 2:11 p.m.
DCA
-
YOW
1h 31mdirect
C$ 483Air Canada
Sat, 25 Jul - Thu, 30 Jul
Air Canada Logo
10:25 a.m. - 12:00 p.m.
YOW
-
DCA
1h 35mdirect
Air Canada Logo
12:40 p.m. - 2:11 p.m.
DCA
-
YOW
1h 31mdirect
C$ 487Air Canada
Sat, 25 Jul - Thu, 30 Jul
Multiple Airlines Logo
7:00 a.m. - 9:15 a.m.
YOW
-
BWI
26h 15m
2 stops
Multiple Airlines Logo
9:30 p.m. - 2:33 p.m.
BWI
-
YOW
17h 03m
1 stop
C$ 659Multiple Airlines
Thu, 4 Jun - Thu, 18 Jun
Multiple Airlines Logo
7:00 a.m. - 9:15 a.m.
YOW
-
BWI
26h 15m
2 stops
Multiple Airlines Logo
9:30 p.m. - 2:33 p.m.
BWI
-
YOW
17h 03m
1 stop
C$ 689Multiple Airlines
Sun, 7 Jun - Fri, 12 Jun
American Airlines Logo
6:45 a.m. - 5:41 p.m.
YOW
-
BWI
10h 56m
2 stops
American Airlines Logo
8:17 p.m. - 6:24 p.m.
BWI
-
YOW
22h 07m
2 stops
C$ 849American Airlines
Mon, 26 Oct - Mon, 26 Oct

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

Our best United Airlines deals on Ottawa to Washington, D.C. flight tickets
United Airlines
9 Jun
YOW6:05 a.m.Ottawa
10h 27m
1 stop
IAD4:32 p.m.Washington, D.C. Dulles Intl
9 Jun
IAD10:10 p.m.Washington, D.C. Dulles Intl
1h 44m
YOW11:54 p.m.Ottawa
C$ 421
United Airlines
27 Jul
YOW6:00 a.m.Ottawa
1h 44m
IAD7:44 a.m.Washington, D.C. Dulles Intl
27 Jul
IAD5:42 p.m.Washington, D.C. Dulles Intl
4h 23m
1 stop
YOW10:05 p.m.Ottawa
C$ 461
United Airlines
11 Jun
YOW6:05 a.m.Ottawa
4h 18m
1 stop
DCA10:23 a.m.Washington, D.C. Reagan-National
11 Jun
DCA12:45 p.m.Washington, D.C. Reagan-National
1h 32m
YOW2:17 p.m.Ottawa
C$ 475

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

Our best Porter Airlines deals on Ottawa to Washington, D.C. flight tickets
Porter Airlines
24 Jul
YOW11:00 a.m.Ottawa
4h 16m
1 stop
IAD3:16 p.m.Washington, D.C. Dulles Intl
29 Jul
IAD11:30 a.m.Washington, D.C. Dulles Intl
6h 24m
1 stop
YOW5:54 p.m.Ottawa
C$ 472
Porter Airlines
3 Jun
YOW11:00 a.m.Ottawa
4h 21m
1 stop
IAD3:21 p.m.Washington, D.C. Dulles Intl
10 Jun
IAD4:05 p.m.Washington, D.C. Dulles Intl
3h 59m
1 stop
YOW8:04 p.m.Ottawa
C$ 475
Porter Airlines
15 Jun
YOW11:00 a.m.Ottawa
4h 21m
1 stop
IAD3:21 p.m.Washington, D.C. Dulles Intl
30 Jun
IAD4:00 p.m.Washington, D.C. Dulles Intl
5h 44m
1 stop
YOW9:44 p.m.Ottawa
C$ 480

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 11 May 2026.
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

Cheapest round-trip

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 9/6

6:05 a.m.-4:32 p.m.

1 stop10h 27m

Washington, D.C. Dulles Intl

Tue 9/6

10:10 p.m.-11:54 p.m.

Nonstop1h 44m

C$ 421

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 27/7

6:00 a.m.-7:44 a.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Mon 27/7

5:42 p.m.-10:05 p.m.

1 stop4h 23m

C$ 461

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 24/7

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

1 stop4h 16m

Washington, D.C. Dulles Intl

Wed 29/7

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

1 stop6h 24m

C$ 472

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 3/6

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

1 stop4h 21m

Washington, D.C. Dulles Intl

Wed 10/6

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

1 stop3h 59m

C$ 475

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 11/6

6:05 a.m.-10:23 a.m.

1 stop4h 18m

Washington, D.C. Reagan-National

Thu 11/6

12:45 p.m.-2:17 p.m.

Nonstop1h 32m

C$ 475

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sat 25/7

9:05 a.m.-3:38 p.m.

1 stop6h 33m

Washington, D.C. Reagan-National

Thu 30/7

12:40 p.m.-2:11 p.m.

Nonstop1h 31m

C$ 483
Quickest round-trip

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sat 25/7

10:25 a.m.-12:00 p.m.

Nonstop1h 35m

Washington, D.C. Reagan-National

Thu 30/7

12:40 p.m.-2:11 p.m.

Nonstop1h 31m

C$ 487

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Thu 4/6

7:00 a.m.-9:15 a.m.

2 stops26h 15m

Baltimore/Washington

Thu 18/6

9:30 p.m.-2:33 p.m.

1 stop17h 03m

C$ 659

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Sun 7/6

7:00 a.m.-9:15 a.m.

2 stops26h 15m

Baltimore/Washington

Fri 12/6

9:30 p.m.-2:33 p.m.

1 stop17h 03m

C$ 689

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Mon 26/10

6:45 a.m.-5:41 p.m.

2 stops10h 56m

Baltimore/Washington

Mon 26/10

8:17 p.m.-6:24 p.m.

2 stops22h 07m

C$ 849

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.

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 April, then book flights to Washington, D.C. from Ottawa during August instead. Flights to Washington, D.C. in August, while not as cheap as those in April, still average around C$ 156.

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 Saturday. Travellers who choose to depart for Washington, D.C. on a Saturday will often find tickets for as low as C$ 803. The most expensive day to fly to Washington, D.C. is Sunday, with ticket prices averaging around C$ 908.

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

In the morning 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$ 780. Flying to Washington, D.C. in the morning 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$ 1,098 per ticket.

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

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

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

You could potentially save up to 27% on your flight if you consider stops on a Ottawa to Washington, D.C. flight.

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

As of May 2026, prices for Ottawa to Washington, D.C. flights are approximately 45% 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$ 345

Fastest flight time

1h 35m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The best one-way flight to Washington, D.C. from Ottawa in the past 72 hours is C$ 345. The best round-trip flight deal from Ottawa to Washington, D.C. found on momondo in the last 72 hours is C$ 523.
The fastest flight from Ottawa to Washington, D.C. takes 1h 35m
Direct flights go from Ottawa to Washington, D.C. every day.
There are 2 airports in Washington, D.C.. From Ottawa there are direct flights to Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD).
Search flight deals

Frequently asked questions about flying from Ottawa to Washington, D.C.

  • 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 35m.

  • 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$ 328Free CancellationRating
8.0
436 reviews
Search Porter Airlines flights
United AirlinesPriceFrom C$ 355Free CancellationRating
7.4
9,700 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 356Free CancellationRating
7.1
11,017 reviews
Search Air Canada flights

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

    United Airlines flies from Ottawa to Washington, D.C. around 34 times per week, with 9,698 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$ 355 (round-trip), much lower than the average airfare cost of C$ 719 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, 11,017 ratings). Air Canada flies from Ottawa to Washington, D.C. around 34 times per week, with deals starting from C$ 356 round-trip and rising to an average price of around C$ 578.

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
Fairfax
Gaithersburg
Linthicum Heights
Bethesda
National Harbor
Reston
Laurel
Herndon
Arlington
Fredericksburg
Manassas
Woodbridge
Silver Spring
Falls Church
Rockville
McLean
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