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Cheap flights from Ottawa to Washington, D.C. from C$ 245

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
3 Jun — 10 Jun1
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 Saturday or Friday 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 4 May 2026.

Fri 12/611:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Mon 15/611:30 a.m.
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Deal found 1/5C$ 435
Sat 30/57:00 a.m.
YOW
-
IAD
1 stop12h 50m
Multiple Airlines
Sat 6/611:30 a.m.
IAD
-
YOW
1 stop7h 24m
Multiple Airlines
Deal found 30/4C$ 446
Mon 15/611:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Mon 22/64:00 p.m.
IAD
-
YOW
1 stop5h 44m
Porter Airlines
Deal found 1/5C$ 448
Mon 27/711:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Fri 31/74:00 p.m.
IAD
-
YOW
1 stop4h 04m
Porter Airlines
Deal found 30/4C$ 457
Fri 29/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Fri 5/611:30 a.m.
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Deal found 1/5C$ 458
Tue 24/1111:00 a.m.
YOW
-
IAD
1 stop6h 14m
Porter Airlines
Fri 27/1111:40 a.m.
IAD
-
YOW
1 stop5h 49m
Porter Airlines
Deal found 3/5C$ 459
Thu 21/511:00 a.m.
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Sun 24/54:05 p.m.
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 1/5C$ 463
Tue 2/67:00 a.m.
YOW
-
BWI
2 stops26h 15m
Multiple Airlines
Sun 7/67:27 p.m.
BWI
-
YOW
1 stop19h 33m
Multiple Airlines
Deal found 30/4C$ 466
Thu 25/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Thu 27/84:00 p.m.
IAD
-
YOW
1 stop5h 44m
Porter Airlines
Deal found 30/4C$ 473
Fri 26/610:25 a.m.
YOW
-
DCA
Nonstop1h 35m
Air Canada
Sun 28/612:40 p.m.
DCA
-
YOW
Nonstop1h 31m
Air Canada
Deal found 2/5C$ 473
Thu 18/611:00 a.m.
YOW
-
IAD
1 stop4h 16m
Porter Airlines
Thu 25/64:00 p.m.
IAD
-
YOW
1 stop4h 04m
Porter Airlines
Deal found 3/5C$ 478
Sat 1/87:30 p.m.
YOW
-
IAD
Nonstop1h 43m
United Airlines
Sun 2/88:25 a.m.
IAD
-
YOW
1 stop8h 13m
United Airlines
Deal found 2/5C$ 481

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 4 May 2026.

Round-trip from

C$ 435

One-way from

C$ 245

Popular in

May

Cheapest in

August

Average price

C$ 624

Good round-trip deal

C$ 577 or less

Good one-way deal

C$ 332 or less
Porter Airlines
  • Porter Airlines
  • 12/6-15/6
  • 2 total stops
  • 7h 45m total
  • Ottawa to Washington, D.C.
Search Deals
20/5
  • 20/5
  • 2 total stops
  • 26h 15m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 4 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

Sat 1/8

6:05 a.m.-11:19 p.m.

1 stop17h 14m

Washington, D.C. Dulles Intl

Sun 2/8

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

Nonstop1h 45m

C$ 481

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 1/6

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

Nonstop1h 36m

Washington, D.C. Reagan-National

Wed 3/6

6:00 a.m.-10:35 a.m.

1 stop4h 35m

C$ 507

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 5/6

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

1 stop4h 19m

Washington, D.C. Reagan-National

Sun 7/6

6:00 a.m.-10:35 a.m.

1 stop4h 35m

C$ 518

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Tue 2/6

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

Nonstop1h 36m

Washington, D.C. Reagan-National

Sat 6/6

4:20 p.m.-10:11 p.m.

1 stop5h 51m

C$ 520

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Wed 19/8

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

1 stop6h 33m

Washington, D.C. Reagan-National

Sun 23/8

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

Nonstop1h 31m

C$ 531

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 26/6

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

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 28/6

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

Nonstop1h 44m

C$ 564

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 1/6

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

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 3/6

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

Nonstop1h 45m

C$ 564

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Sat 13/6

7:00 a.m.-8:56 p.m.

1 stop13h 56m

Baltimore/Washington

Sat 20/6

6:09 p.m.-12:54 p.m.

2 stops18h 45m

C$ 573

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 15/6

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

Nonstop1h 43m

Washington, D.C. Dulles Intl

Mon 22/6

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

1 stop4h 23m

C$ 575

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 30/5

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

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sat 6/6

5:06 p.m.-6:48 p.m.

Nonstop1h 42m

C$ 583

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/4

Showing 1-10 of 40 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.?

To ensure you get the cheapest price possible for a flight from Ottawa to Washington, D.C., you should look to book at least 36 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$ 136). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 375). 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 4 May 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 4 May 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 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$ 410.

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 53m.

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 4 May 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
436 reviews
Check prices

Crew

8.6

Boarding

8.2

Entertainment

7.0

Food

7.6

Comfort

8.0

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
436 reviews
Porter Airlines
8.0
Very good
436 reviews
Check prices

Crew

8.6

Boarding

8.2

Entertainment

7.0

Food

7.6

Comfort

8.0

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
9,681 reviews
Porter Airlines
8.0
Very good
436 reviews
Check prices

Crew

8.6

Boarding

8.2

Entertainment

7.0

Food

7.6

Comfort

8.0

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
10,996 reviews
Porter Airlines
8.0
Very good
436 reviews
Check prices

Crew

8.6

Boarding

8.2

Entertainment

7.0

Food

7.6

Comfort

8.0

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 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 United Airlines and Air Canada 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 15h 38m. 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$ 262. Additional round-trip tickets that might be worth considering are offered by Porter Airlines and Air Canada, with the lowest prices starting at C$ 326 and C$ 353, respectively. These flights start at 48% 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 (86%), Air Canada (84%) and Avianca (78%).

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

    The cheapest flight price from Ottawa to Washington, D.C. is C$ 272. On average you can expect to pay C$ 610. The most popular route, (Ottawa - Washington, D.C. Dulles Intl), can usually be booked for C$ 435.

  • 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$ 136). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of C$ 375). 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

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 4 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 262AverageC$ 629FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 326AverageC$ 408FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 353AverageC$ 567FlexibilityNo 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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