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Washington, D.C.

$180+ 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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Cheapflights Tip: The best prices from Ottawa to Washington, D.C. are usually found in March or April, booked 58 days in advance, depart on a Friday or Wednesday and return on a Monday

Cheap 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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$292
(Trip.com)

One-way from

$180
(Kiwi.com)

Popular in

September

Cheapest in

March

Average price

$480

Good round-trip deal

$284 or less

Good one-way deal

$237 or less
Provider with most accurate pricing for Ottawa-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Ottawa-Washington, D.C. (WAS) flights.
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From Ottawa to Washington, D.C. (WAS)
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One-way flight from Ottawa to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 13% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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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Find 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 September 29, 2025.

This lol.travel deal was found by Cheapflights users on 9/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/182:48 pmYOW - IAD
1 stop8h 10mUnited Airlines
Sun 10/198:16 amIAD - YOW
Nonstop1h 42mUnited Airlines
Deal found 9/27$263
This Trip.com deal was found by Cheapflights users on 9/27. 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.
Sat 10/189:35 amYOW - IAD
1 stop5h 31mPorter Airlines
Sun 10/194:20 pmIAD - YOW
1 stop3h 39mPorter Airlines
Deal found 9/27$289
This Trip.com deal was found by Cheapflights users on 9/27. 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.
Thu 10/306:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Tue 11/46:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Deal found 9/27$292
This Trip.com deal was found by Cheapflights users on 9/28. 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.
Tue 11/1112:10 pmYOW - IAD
1 stop5h 04mPorter Airlines
Tue 11/186:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Deal found 9/28$293
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/212:45 pmYOW - IAD
Nonstop1h 43mUnited Airlines
Tue 10/2110:19 pmIAD - YOW
2 stops13h 26mUnited Airlines
Deal found 9/29$296
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 10/319:30 amYOW - BWI
1 stop11h 16mMultiple Airlines
Sun 11/24:52 pmBWI - YOW
1 stop24h 21mMultiple Airlines
Deal found 9/29$296
This United Airlines deal was found by Cheapflights users on 9/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:05 amYOW - DCA
1 stop3h 53mUnited Airlines
Tue 10/2112:55 pmDCA - YOW
Nonstop1h 31mUnited Airlines
Deal found 9/28$310
This United deal was found by Cheapflights users on 9/29. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/212:45 pmYOW - IAD
Nonstop1h 43mMultiple Airlines
Tue 10/2110:35 pmIAD - YOW
1 stop10h 36mMultiple Airlines
Deal found 9/29$318
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Thu 10/301:20 pmYOW - IAD
1 stop3h 54mMultiple Airlines
Tue 11/48:40 amIAD - YOW
2 stops32h 33mMultiple Airlines
Deal found 9/27$329
This FlightHub deal was found by Cheapflights users on 9/28. 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.
Thu 10/306:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Mon 11/311:40 amIAD - YOW
1 stop5h 49mPorter Airlines
Deal found 9/28$331
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Sat 10/259:35 amYOW - IAD
1 stop5h 31mMultiple Airlines
Sat 11/18:36 pmIAD - YOW
1 stop21h 37mMultiple Airlines
Deal found 9/27$333
This Trip.com deal was found by Cheapflights users on 9/27. 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.
Sat 10/1810:25 amYOW - DCA
Nonstop1h 43mAir Canada
Sun 10/196:00 amDCA - YOW
1 stop4h 25mAir Canada
Deal found 9/27$335

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 September 29, 2025.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. that are best for you.

Fly from

Ottawa

Fly to

Washington, D.C.

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 10/18

9:35 am-3:06 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Sun 10/19

4:20 pm-7:59 pm

1 stop3h 39m

$289

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 11/17

6:50 am-10:24 am

1 stop3h 34m

Washington, D.C. Dulles Intl

Tue 11/25

6:30 pm-10:29 pm

1 stop3h 59m

$292

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 10/31

12:10 pm-5:14 pm

1 stop5h 04m

Washington, D.C. Dulles Intl

Sun 11/2

6:30 pm-10:29 pm

1 stop3h 59m

$292

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/30

12:10 pm-5:14 pm

1 stop5h 04m

Washington, D.C. Dulles Intl

Tue 11/4

6:30 pm-10:29 pm

1 stop3h 59m

$292

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 11/16

12:10 pm-5:14 pm

1 stop5h 04m

Washington, D.C. Dulles Intl

Mon 11/17

11:40 am-3:04 pm

1 stop3h 24m

$292

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 10/21

2:45 pm-4:28 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Tue 10/21

10:19 pm-11:45 am

2 stops13h 26m

$296

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Tue 10/21

6:05 am-9:58 am

1 stop3h 53m

Washington, D.C. Reagan-National

Tue 10/21

12:55 pm-2:26 pm

Nonstop1h 31m

$310

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 10/21

2:45 pm-4:28 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Tue 10/21

10:35 pm-9:11 am

1 stop10h 36m

$318

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 10/30

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Tue 11/4

8:40 am-5:13 pm

2 stops32h 33m

$329

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Tue 11/11

10:30 am-12:19 pm

Nonstop1h 49m

Washington, D.C. Reagan-National

Tue 11/18

12:55 pm-2:30 pm

Nonstop1h 35m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 51 results
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Compare providers for flights from Ottawa to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Washington, D.C. in September.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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 September 26, 2025.

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 58 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, August is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of $292). Flying from Ottawa to Washington, D.C. in April is currently the most expensive (average of $337). 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 September 29, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 52% on flights from Ottawa to Washington, D.C. by exploring options for tickets in the afternoon.

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 September 29, 2025.

The most flights from YOW to WAS are scheduled on a Saturday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

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 September 29, 2025.
See what other customers who have flown with Porter Airlines, 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.
Porter Airlines
7.9
Good
371 reviews

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
371 reviews
Porter Airlines
7.9
Good
371 reviews

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,924 reviews
Porter Airlines
7.9
Good
371 reviews

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
371 reviews

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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 8 flights from Ottawa to Washington, D.C. per day from 3 different airlines.

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

    Porter Airlines, United Airlines, and Air Canada can get you from Ottawa to Washington, D.C. in just under 1h 49m. Your travel time can differ by up to 3h 42m. 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?

    Porter Airlines, at $197, was found to be the cheapest airline from Ottawa to Washington, D.C..Alternate airlines to your destination round-trip include United Airlines and Air Canada. These flights start at 43% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Ottawa to Washington, D.C. one-way?

    The cheapest airlines for a one-way flight from Ottawa to Washington, D.C. are Porter Airlines ($180), Air Canada ($189), and American Airlines ($189).

  • 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 GoJet (74%), Air Canada (74%) or United Airlines (74%) 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 $556, our data shows the cheapest flight currently is $198. When looking at the most popular route, (Ottawa - Washington, D.C. Dulles Intl), you can expect to pay $263 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, August is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. (average of $292). Flying from Ottawa to Washington, D.C. in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Laurel
Manassas
Hanover
Oxon Hill
Towson
National Harbor
Dundalk
Waldorf

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 2,558,603 searches. Data last updated September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$197Average$317FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$281Average$443FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$284Average$453FlexibilityNo cancel feeOn-time67%

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