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Washington, D.C.

$176+ Cheap flights from Ottawa (YOW) to Washington, D.C. (WAS)

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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
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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 Wednesday or Thursday and return on a Wednesday

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

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 April 17, 2026.

This Trip.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2911:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Fri 6/54:05 pm
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Deal found 4/14$309
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/811:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Mon 5/114:05 pm
IAD
-
YOW
1 stop3h 59m
Porter Airlines
Deal found 4/14$310
This FlightHub deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/811:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Tue 5/1211:30 am
IAD
-
YOW
1 stop6h 24m
Porter Airlines
Deal found 4/13$312
This Trip.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/111:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Wed 6/34:05 pm
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 4/13$313
This Trip.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Sun 6/74:05 pm
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 4/17$315
This Justfly.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/811:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Sun 5/104:05 pm
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 4/14$316
This FlightHub deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3111:00 am
YOW
-
IAD
1 stop4h 21m
Porter Airlines
Wed 6/34:05 pm
IAD
-
YOW
1 stop5h 39m
Porter Airlines
Deal found 4/16$321
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:00 am
YOW
-
IAD
2 stops11h 42m
Multiple Airlines
Sun 6/75:30 pm
IAD
-
YOW
1 stop21h 45m
Multiple Airlines
Deal found 4/17$322
This Mytrip deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:00 am
YOW
-
BWI
1 stop16h 29m
Multiple Airlines
Sat 6/66:30 am
BWI
-
YOW
1 stop8h 45m
Multiple Airlines
Deal found 4/14$332
This Air Canada deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2410:25 am
YOW
-
DCA
Nonstop1h 35m
Air Canada
Wed 7/2912:40 pm
DCA
-
YOW
Nonstop1h 31m
Air Canada
Deal found 4/17$346
This Kiwi.com deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:20 pm
YOW
-
BWI
2 stops17h 23m
Multiple Airlines
Thu 5/149:59 pm
BWI
-
YOW
1 stop16h 34m
Multiple Airlines
Deal found 4/15$352
This Trip.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:25 am
YOW
-
DCA
Nonstop1h 36m
Air Canada
Fri 6/512:45 pm
DCA
-
YOW
Nonstop1h 32m
Air Canada
Deal found 4/14$354

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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$309
(Trip.com)

One-way from

$176
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$355

Good round-trip deal

$410 or less

Good one-way deal

$216 or less
Provider with most accurate pricing for Ottawa-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-Washington, D.C. (WAS) flights.
Search Deals
From Ottawa to Washington, D.C. (WAS)
Search Deals
One-way flight from Ottawa to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 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 2,558,603 searches. Data last updated April 17, 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

Fri 5/29

11:00 am-3:21 pm

1 stop4h 21m

Washington, D.C. Dulles Intl

Fri 6/5

6:22 pm-12:20 am

2 stops29h 58m

$342
Quickest round-trip

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 5/29

10:25 am-12:01 pm

Nonstop1h 36m

Washington, D.C. Reagan-National

Fri 6/5

12:45 pm-2:17 pm

Nonstop1h 32m

$354

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 5/8

7:30 pm-9:18 pm

Nonstop1h 48m

Washington, D.C. Dulles Intl

Mon 5/11

10:07 pm-11:54 pm

Nonstop1h 47m

$359

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 5/23

7:30 pm-9:13 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 5/30

8:18 am-10:03 am

Nonstop1h 45m

$359

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sat 5/30

11:15 am-3:39 pm

1 stop4h 24m

Washington, D.C. Reagan-National

Sat 6/6

6:00 am-11:31 am

1 stop5h 31m

$365

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 6/1

6:00 am-7:44 am

Nonstop1h 44m

Washington, D.C. Dulles Intl

Thu 6/4

12:35 pm-4:38 pm

1 stop4h 03m

$377

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 5/8

10:25 am-12:01 pm

Nonstop1h 36m

Washington, D.C. Reagan-National

Sun 5/10

12:45 pm-2:17 pm

Nonstop1h 32m

$377

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 5/28

6:00 am-7:44 am

Nonstop1h 44m

Washington, D.C. Dulles Intl

Fri 5/29

8:18 am-10:03 am

Nonstop1h 45m

$379

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 6/8

10:25 am-12:01 pm

Nonstop1h 36m

Washington, D.C. Reagan-National

Fri 6/12

12:45 pm-2:17 pm

Nonstop1h 32m

$380

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Fri 5/29

5:50 pm-9:53 pm

1 stop4h 03m

Washington, D.C. Reagan-National

Sat 5/30

10:00 am-4:38 pm

1 stop6h 38m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

Showing 1-10 of 55 resultsSorted by cheapest first
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2
3
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6
  • Most accurate provider: When it comes to deals on Ottawa-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 April 10, 2026.

The price you pay for your flight from Ottawa to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 26 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $100). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of $276). 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 April 17, 2026.

When flying from Ottawa to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 April 17, 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.?

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 April 17, 2026.
See what other customers who have flown with United Airlines and Air Canada from Ottawa to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,602 reviews

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,602 reviews
United Airlines
7.4
Good
9,602 reviews

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,932 reviews
United Airlines
7.4
Good
9,602 reviews

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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.?

    If you book a flight to Washington, D.C. from Ottawa, you will be flying from Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There are 10 flights from Ottawa to Washington, D.C. per day from 2 different airlines.

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

    Porter Airlines, Air Canada, and United Airlines can get you from Ottawa to Washington, D.C. in just under 1h 36m. Your travel time can differ by up to 2h 45m. There are 452 mi between Ottawa and Washington, D.C.. This flight may include one or multiple stops.

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

    Air Canada, at $296, was found to be the cheapest airline from Ottawa to Washington, D.C.. An alternate airline flying to your destination would be United Airlines. These flights start at 19% lower than the current average price 3 months from now.

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

    While some choose either Ottawa - Washington, D.C. Reagan-National or Ottawa - Baltimore/Washington, Ottawa - Washington, D.C. Dulles Intl is the most popular route from Ottawa to Washington, D.C..

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

    Consider Republic Airways (89%), Air Canada (84%) or Avianca (82%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to Washington, D.C..

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

    While on average a flight from Ottawa to Washington, D.C. is generally $530, our data shows the cheapest flight currently is $192. When looking at the most popular route, (Ottawa - Washington, D.C. Dulles Intl), you can expect to pay $312 for that flight.

  • 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 $100). Flying from Ottawa to Washington, D.C. in October is currently the most expensive (average of $276). 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

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Largo
Upper Marlboro
Waldorf
Bowie
Clinton
Towson
Hunt Valley
Cordova

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ottawa to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Reagan-National flights
Pearson Intl to Dulles Intl flights
Ottawa to Reagan-National flights
London to Dulles Intl flights

Top 2 airlines flying from Ottawa to Washington, D.C.

Discover the top 2 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 2,558,603 searches. Data last updated April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$296Average$398FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$338Average$443FlexibilityNo cancel feeOn-time69%

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