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Cheap flights from Ottawa to Washington, D.C. from C$ 238

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
21 Jul — 28 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Washington, D.C.
Explore the most affordable flight options available from Ottawa to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 June 2026.

Fri 31/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Mon 3/83:50 p.m.
IAD
-
YOW
1 stop4h 14m
Porter Airlines
Deal found 20/6C$ 413
Wed 8/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Wed 15/73:55 p.m.
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Deal found 20/6C$ 416
Tue 4/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Mon 10/83:50 p.m.
IAD
-
YOW
1 stop4h 14m
Porter Airlines
Deal found 20/6C$ 417
Mon 21/910:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Fri 25/93:50 p.m.
IAD
-
YOW
1 stop4h 14m
Porter Airlines
Deal found 19/6C$ 419
Thu 16/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Tue 21/73:55 p.m.
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Deal found 20/6C$ 420
Thu 23/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Sun 26/73:55 p.m.
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Deal found 19/6C$ 422
Fri 17/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Mon 20/73:55 p.m.
IAD
-
YOW
1 stop5h 49m
Porter Airlines
Deal found 19/6C$ 423
Sat 11/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Fri 17/73:55 p.m.
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Deal found 18/6C$ 425
Fri 28/810:40 a.m.
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Mon 31/811:25 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Deal found 19/6C$ 427
Thu 16/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Thu 23/73:55 p.m.
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Deal found 18/6C$ 429
Fri 3/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Mon 6/73:55 p.m.
IAD
-
YOW
1 stop5h 49m
Porter Airlines
Deal found 19/6C$ 432
Sat 11/710:40 a.m.
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Thu 6/811:25 a.m.
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Deal found 19/6C$ 434

Find flight deals from Ottawa to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 June 2026.

Round-trip from

C$ 413

One-way from

C$ 238

Popular in

May

Cheapest in

August

Average price

C$ 552

Good round-trip deal

C$ 640 or less

Good one-way deal

C$ 370 or less
Porter Airlines
  • Porter Airlines
  • 31/7-3/8
  • 2 total stops
  • 8h 45m total
  • Ottawa to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 5/10
  • 1 total stop
  • 4h 30m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 108 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Ottawa to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Ottawa to Washington, D.C. (WAS).
Search Deals

Cheapflights 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, Cheapflights users made 629,999 searches. Data last updated 21 June 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 - DCA

YOWDCA

Ottawa

Tue 1/9

11:15 a.m.-3:38 p.m.

1 stop4h 23m

Washington, D.C. Reagan-National

Wed 2/9

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

Nonstop1h 31m

C$ 454

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 9/7

10:40 a.m.-3:11 p.m.

1 stop4h 31m

Washington, D.C. Dulles Intl

Fri 7/8

3:50 p.m.-8:04 p.m.

1 stop4h 14m

C$ 471

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 11/7

9:15 a.m.-3:11 p.m.

1 stop5h 56m

Washington, D.C. Dulles Intl

Mon 3/8

3:50 p.m.-8:04 p.m.

1 stop4h 14m

C$ 471

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 16/7

10:40 a.m.-3:11 p.m.

1 stop4h 31m

Washington, D.C. Dulles Intl

Fri 17/7

3:55 p.m.-9:44 p.m.

1 stop5h 49m

C$ 471

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 1/9

7:34 p.m.-9:18 p.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Wed 2/9

8:35 a.m.-4:38 p.m.

1 stop8h 03m

C$ 484

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 8/10

9:05 a.m.-3:40 p.m.

1 stop6h 35m

Washington, D.C. Reagan-National

Sun 11/10

6:00 a.m.-11:30 a.m.

1 stop5h 30m

C$ 507

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 2/7

10:40 a.m.-3:11 p.m.

1 stop4h 31m

Washington, D.C. Dulles Intl

Tue 7/7

3:55 p.m.-8:04 p.m.

1 stop4h 09m

C$ 507

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 16/7

5:50 p.m.-11:19 p.m.

1 stop5h 29m

Washington, D.C. Dulles Intl

Fri 17/7

8:18 a.m.-10:03 a.m.

Nonstop1h 45m

C$ 508

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 12/8

7:34 p.m.-9:18 p.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sat 15/8

3:40 p.m.-9:35 p.m.

1 stop5h 55m

C$ 508

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 28/8

6:00 a.m.-10:18 a.m.

1 stop4h 18m

Washington, D.C. Reagan-National

Mon 31/8

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

Nonstop1h 31m

C$ 509

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/6

Showing 1-10 of 53 resultsSorted by cheapest first
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Best time to book a flight from Ottawa to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to Washington, D.C.

What is the cheapest month to book a flight from Ottawa to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 161). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 391). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to WAS?

Find hourly flight availability from Ottawa to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to Washington, D.C. as you normally would.

Weekly flight availability from Ottawa to Washington, D.C.

Explore weekly flight availability from Ottawa to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 21 June 2026.

The most flights from YOW to WAS are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).

How much does it cost to fly round-trip from Ottawa to Washington, D.C.?

What’s the top layover airport for flights from Ottawa to Washington, D.C.?

Share of one-stop round-trip flights from Ottawa to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YTZ) – chosen by Cheapflights users on 90% of one-stop itineraries from Ottawa to Washington, D.C. on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to Washington, D.C.?

Average round-trip fare for 1-stop flights from Ottawa to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 415.

What’s the fastest layover option from Ottawa to Washington, D.C.?

Shortest average travel time for 1-stop one-way flights from Ottawa to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 3h 42m.

Which airport typically offers the quickest layover for flights from Ottawa to Washington, D.C.?

Average layover duration for 1-stop one-way flights from Ottawa to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 06m.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 21 June 2026.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from Ottawa to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
438 reviews
Check prices

Overall

8.0

Entertainment

6.9

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Porter Airlines
8.0
Very good
438 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Overall

8.0

Entertainment

6.9

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
United Airlines
7.4
Good
9,868 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Overall

8.0

Entertainment

6.9

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Air Canada
7.1
Good
11,231 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Overall

8.0

Entertainment

6.9

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to Washington, D.C.?

    For a flight from Ottawa to Washington, D.C., you will be flying from Ottawa. Ottawa (YOW) is just 10.6 km from the centre of the city. Ottawa is the only Ottawa airport and it handles 9 outbound flights to Washington, D.C. per day. 3 airlines have flights to Washington, D.C. from Ottawa on a regular basis.

  • How long is the flight from Ottawa to Washington, D.C.?

    Airlines like Air Canada, Porter Airlines, and United Airlines fly from Ottawa to Washington, D.C. in about 1h 44m. The time it takes to get you to your destination can typically vary by up to 2h 47m. The distance between Ottawa and Washington, D.C. is about 723 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Ottawa to Washington, D.C. round-trip?

    Flying on Porter Airlines is currently your cheapest option to Washington, D.C., with prices starting at C$ 340. Additional round-trip tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at C$ 367 and C$ 368, respectively. These flights start at 39% lower than the current average price 3 months from now.

  • What are the most popular routes from Ottawa to Washington, D.C.?

    The most popular flight routes from Ottawa to Washington, D.C. are Ottawa - Washington, D.C. Dulles Intl, Ottawa - Washington, D.C. Reagan-National and Ottawa - Baltimore/Washington.

  • What are the most reliable airlines from Ottawa to Washington, D.C.?

    The top 3 most reliable airlines when flying from Ottawa to Washington, D.C. are Avianca (100%), Republic Airways (95%) and United Airlines (89%).

  • What are the cheapest flights from Ottawa to Washington, D.C.?

    The cheapest flight price from Ottawa to Washington, D.C. is C$ 304. On average you can expect to pay C$ 1,221. The most popular route, (Ottawa - Washington, D.C. Dulles Intl), can usually be booked for C$ 413.

  • Can I find deals for flights from Ottawa to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Ottawa to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Washington, D.C..

  • Can I find deals for business class flights from Ottawa to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Ottawa to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to Washington, D.C.?

    Currently, August is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 161). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 391). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Hanover
Fairfax
Oxon Hill
Gaithersburg
Reston
Herndon
Ellicott City
Arlington
Fredericksburg
Alexandria
Rockville

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Ottawa to Washington, D.C.

Discover the top 3 airlines that operate flights from Ottawa to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 21 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 340AverageC$ 424FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 367AverageC$ 816FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 368AverageC$ 603FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to Washington, D.C.?

Deals for Ottawa to Washington, D.C. flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Washington, D.C.?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Washington, D.C. for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ottawa to Washington, D.C. with no change fees?

Yes, we can. To see specific flights from Ottawa to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to Washington, D.C. become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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