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Cheap flights from Ottawa to Washington, D.C. from C$ 249

YOW — WAS
21 Oct — 28 Oct1
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.

Wed 2/126:00 a.m. -
1 stop25h 22m
Thu 3/121:19 p.m. -
Nonstop1h 48m
Deal found 20/9C$ 386
Sun 11/106:00 a.m. -
1 stop4h 20m
Wed 14/106:00 a.m. -
1 stop4h 18m
Deal found 18/9C$ 433
Mon 2/1112:15 p.m. -
1 stop5h 28m
Mon 9/1111:20 a.m. -
1 stop4h 49m
Deal found 18/9C$ 435
Sun 11/106:00 a.m. -
1 stop4h 20m
Thu 15/106:00 a.m. -
1 stop4h 18m
Deal found 18/9C$ 435
Fri 23/1010:40 a.m. -
1 stop4h 30m
Mon 26/1011:20 a.m. -
1 stop4h 49m
Deal found 19/9C$ 436
Sun 11/1010:40 a.m. -
1 stop4h 30m
Thu 15/103:50 p.m. -
1 stop5h 52m
Deal found 18/9C$ 438
Fri 9/1010:40 a.m. -
1 stop4h 30m
Tue 13/1011:25 a.m. -
1 stop6h 27m
Deal found 18/9C$ 439
Fri 13/1112:15 p.m. -
1 stop5h 28m
Sat 21/1111:20 a.m. -
1 stop4h 49m
Deal found 17/9C$ 440
Sun 1/1112:15 p.m. -
1 stop5h 28m
Sun 8/1111:20 a.m. -
1 stop4h 49m
Deal found 17/9C$ 442
Wed 11/1110:50 a.m. -
1 stop4h 34m
Sun 15/116:00 a.m. -
1 stop3h 47m
Deal found 19/9C$ 442
Wed 11/119:10 a.m. -
1 stop6h 35m
Sun 15/115:20 p.m. -
1 stop4h 32m
Deal found 19/9C$ 443
Thu 8/1010:40 a.m. -
1 stop4h 30m
Sun 11/103:50 p.m. -
1 stop4h 12m
Deal found 20/9C$ 446

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

Round-trip from

C$ 386

One-way from

C$ 249

Popular in

May

Cheapest in

December

Average price

C$ 512

Good round-trip deal

C$ 455 or less

Good one-way deal

C$ 342 or less
United Airlines
  • United Airlines
  • 2/12-3/12
  • 1 total stop
  • 27h 10m total
  • Ottawa to Washington, D.C.
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5/10-31/12
  • 5/10-31/12
  • 1 total stop
  • 29h 45m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ottawa to Washington, D.C. (WAS).
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Price to beat on a one-way flight from Ottawa to Washington, D.C. (WAS).
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Cheapflights Fare Finder

 
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 Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Tue 3/11

7:05 a.m.-8:11 p.m.

1 stop13h 06m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 253

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Wed 2/12

2:00 p.m.-3:53 p.m.

Nonstop1h 53m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 264

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Sat 10/10

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 264

OttawaBaltimore

YOW Ottawa - BWI Baltimore/Washington

YOWBWI

Ottawa

Tue 3/11

7:05 a.m.-1:01 p.m.

1 stop29h 56m

Baltimore/Washington

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 273

OttawaWashington, D.C.

YOW Ottawa - DCA Washington, D.C. Reagan-National

YOWDCA

Ottawa

Fri 30/10

5:40 p.m.-9:59 p.m.

1 stop4h 19m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 275

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Wed 25/11

9:45 a.m.-11:48 a.m.

Nonstop2h 03m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 277

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Tue 3/11

2:00 p.m.-3:53 p.m.

Nonstop1h 53m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 277

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Mon 5/10

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 277

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Sat 31/10

9:45 a.m.-11:48 a.m.

Nonstop2h 03m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 277

OttawaWashington, D.C.

YOW Ottawa - DCA Washington, D.C. Reagan-National

YOWDCA

Ottawa

Thu 15/10

6:05 a.m.-10:44 a.m.

1 stop4h 39m

Washington, D.C. Reagan-National

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 285

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/9

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

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, January is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 464). Flying from Ottawa to Washington, D.C. in August is currently the most expensive (average of C$ 628). 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?

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.

The most flights from YOW to WAS are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

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

Airfare is below average for this route at the moment.
Ottawa to Washington, D.C. flights typically cost between C$ 467 and C$ 750 in December.
The cheapest round-trip price found within the last 5 days was C$ 386 on United Airlines (2 Dec-3 Dec).

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

Toronto (YTZ) – chosen by Cheapflights users on 93% 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.?

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 409.

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

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.?

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 16m.

Reviews of airlines servicing Washington, D.C.

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
462 reviews
Check prices

Boarding

8.2

Entertainment

6.9

Food

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Porter Airlines
8.0
Very good
462 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Boarding

8.2

Entertainment

6.9

Food

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
United Airlines
7.4
Good
10,224 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Boarding

8.2

Entertainment

6.9

Food

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Canada
7.1
Good
11,658 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Boarding

8.2

Entertainment

6.9

Food

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Related info for your journey

  • 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 4h 20m. The time it takes to get you to your destination can typically vary by up to 21h 02m. 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$ 269. Additional round-trip tickets that might be worth considering are offered by Porter Airlines and Air Canada, with the lowest prices starting at C$ 319 and C$ 364, respectively. These flights start at 53% 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 (92%), Republic Airways (89%) and Air Canada (80%).

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

    The cheapest flight price from Ottawa to Washington, D.C. is C$ 260. On average you can expect to pay C$ 2,104. 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, January is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of C$ 464). Flying from Ottawa to Washington, D.C. in August is currently the most expensive (average of C$ 628). 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
Alexandria
Hanover
Oxon Hill
Gaithersburg
Reston
Herndon
Ellicott City
Arlington
Fredericksburg
Rockville

Browse thousands of different options on Cheapflights for your next trip

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

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 269AverageC$ 569FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 319AverageC$ 433FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 364AverageC$ 608FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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?

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