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Cheap flights from Ottawa to Washington, D.C. from C$ 241

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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
17 May — 24 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to Washington, D.C. are usually found in August or December, booked 26 days in advance, depart on a Friday or Saturday and return on a Thursday

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 17 April 2026.

Thu 7/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Sun 10/54:05 p.m.
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 12/4C$ 418
Fri 29/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Fri 5/64:05 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Deal found 14/4C$ 424
Wed 6/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Fri 8/54:05 p.m.
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Deal found 12/4C$ 425
Mon 1/611:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Wed 3/64:05 p.m.
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 14/4C$ 427
Fri 8/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Tue 12/511:30 a.m.
IAD
-
YOW
1 stop6h 24m
Porter Airlines
Deal found 13/4C$ 428
Wed 27/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Sun 7/64:05 p.m.
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 17/4C$ 432
Fri 8/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Sun 10/54:05 p.m.
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 14/4C$ 433
Fri 8/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Mon 11/511:30 a.m.
IAD
-
YOW
1 stop6h 24m
Porter Airlines
Deal found 15/4C$ 436
Sun 31/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Wed 3/64:05 p.m.
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 16/4C$ 440
Wed 27/57:00 a.m.
YOW
-
IAD
2 stops11h 42m
Multiple Airlines
Sun 7/65:30 p.m.
IAD
-
YOW
1 stop21h 45m
Multiple Airlines
Deal found 17/4C$ 442
Sat 30/57:00 a.m.
YOW
-
BWI
1 stop16h 29m
Multiple Airlines
Sat 6/66:30 a.m.
BWI
-
YOW
1 stop8h 45m
Multiple Airlines
Deal found 14/4C$ 455
Fri 24/710:25 a.m.
YOW
-
DCA
Nonstop1h 35m
Air Canada
Wed 29/712:40 p.m.
DCA
-
YOW
Nonstop1h 31m
Air Canada
Deal found 17/4C$ 475

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 17 April 2026.

Round-trip from

C$ 424

One-way from

C$ 241

Popular in

November

Cheapest in

August

Average price

C$ 487

Good round-trip deal

C$ 538 or less

Good one-way deal

C$ 341 or less
Porter Airlines
  • Porter Airlines
  • 29/5-5/6
  • 2 total stops
  • 8h 20m total
  • Ottawa to Washington, D.C.
Search Deals
18/5
  • 18/5
  • 1 total stop
  • 25h 32m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 17 April 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

Thu 28/5

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

1 stop4h 21m

Washington, D.C. Dulles Intl

Fri 29/5

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

1 stop3h 59m

C$ 480
Quickest round-trip

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 29/5

10:25 a.m.-12:01 p.m.

Nonstop1h 36m

Washington, D.C. Reagan-National

Fri 5/6

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

Nonstop1h 32m

C$ 486

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 8/5

7:30 p.m.-9:18 p.m.

Nonstop1h 48m

Washington, D.C. Dulles Intl

Mon 11/5

10:07 p.m.-11:54 p.m.

Nonstop1h 47m

C$ 492

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 23/5

7:30 p.m.-9:13 p.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 30/5

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

Nonstop1h 45m

C$ 492

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 1/6

6:00 a.m.-10:19 a.m.

1 stop4h 19m

Washington, D.C. Reagan-National

Mon 8/6

6:00 a.m.-11:31 a.m.

1 stop5h 31m

C$ 494

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sat 30/5

11:15 a.m.-3:39 p.m.

1 stop4h 24m

Washington, D.C. Reagan-National

Sat 6/6

6:00 a.m.-11:31 a.m.

1 stop5h 31m

C$ 501

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 8/5

5:50 p.m.-9:55 p.m.

1 stop4h 05m

Washington, D.C. Reagan-National

Mon 11/5

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

Nonstop1h 32m

C$ 503

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 1/5

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

1 stop4h 21m

Washington, D.C. Dulles Intl

Thu 14/5

4:05 p.m.-9:44 p.m.

1 stop5h 39m

C$ 510

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 1/6

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

Nonstop1h 44m

Washington, D.C. Dulles Intl

Thu 4/6

12:35 p.m.-4:38 p.m.

1 stop4h 03m

C$ 517

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 8/5

10:25 a.m.-12:01 p.m.

Nonstop1h 36m

Washington, D.C. Reagan-National

Sun 10/5

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

Nonstop1h 32m

C$ 517

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 57 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.

How far ahead should I book a flight from Ottawa to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Washington, D.C.. Price data was last updated on 10 April 2026.

To ensure you get the cheapest price possible for a flight from Ottawa to Washington, D.C., you should look to book at least 26 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, April is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 137). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 379). 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 17 April 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 17 April 2026.

The most flights from YOW to WAS are scheduled on a Wednesday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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 98% 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$ 419.

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 (YTZ) have the shortest average one-way travel time for 1-stop routes: 3h 50m.

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 17 April 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
435 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
435 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,603 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,932 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 10 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 Porter Airlines, Air Canada, and United Airlines fly from Ottawa to Washington, D.C. in about 1h 36m. The time it takes to get you to your destination can typically vary by up to 2h 45m. The distance between Ottawa and Washington, D.C. is about 727 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 United Airlines is currently your cheapest option to Washington, D.C., with prices starting at C$ 264. Additional round-trip tickets that might be worth considering are offered by Porter Airlines and Air Canada, with the lowest prices starting at C$ 329 and C$ 357, respectively. These flights start at 47% 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 Republic Airways (89%), Air Canada (84%) and Avianca (82%).

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

    The cheapest flight price from Ottawa to Washington, D.C. is C$ 274. On average you can expect to pay C$ 655. The most popular route, (Ottawa - Washington, D.C. Dulles Intl), can usually be booked for C$ 428.

  • 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, April is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 137). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 379). 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
Reston
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Herndon
Manassas
Fredericksburg
Alexandria
Rockville

Browse thousands of different options on Cheapflights for your next trip

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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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 264AverageC$ 646FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 329AverageC$ 417FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 357AverageC$ 572FlexibilityNo 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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