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Washington, D.C.

$145+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — WAS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$237
(Trip.com)

One-way from

$145
(Trip.com)

Popular in

October

Cheapest in

March

Average price

$361

Good round-trip deal

$295 or less

Good one-way deal

$177 or less
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. 11% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/148:35 amYOW - IAD
1 stop6h 31mPorter Airlines
Fri 9/194:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Deal found 7/29$237
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/810:25 amYOW - DCA
Nonstop1h 43mAir Canada
Fri 9/126:00 amDCA - YOW
1 stop4h 24mAir Canada
Deal found 7/29$275
This Kissandfly.com deal was found by Cheapflights users on 7/31. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:29 pmYOW - IAD
Nonstop1h 43mLufthansa
Sun 9/146:20 amIAD - YOW
1 stop5h 25mLufthansa
Deal found 7/31$285
This lol.travel deal was found by Cheapflights users on 7/31. 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 9/132:48 pmYOW - IAD
1 stop5h 53mUnited Airlines
Sun 9/148:16 amIAD - YOW
Nonstop1h 42mUnited Airlines
Deal found 7/31$288
This lol.travel deal was found by Cheapflights users on 7/30. 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.
Thu 8/216:33 amYOW - DCA
1 stop5h 26mUnited Airlines
Mon 8/251:00 pmDCA - YOW
1 stop3h 43mUnited Airlines
Deal found 7/30$308
This Air Canada deal was found by Cheapflights users on 7/30. 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.
Wed 8/275:15 amYOW - IAD
1 stop4h 22mAir Canada
Wed 9/39:35 amIAD - YOW
1 stop4h 16mAir Canada
Deal found 7/30$324
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Tue 9/235:55 amYOW - IAD
1 stop9h 11mMultiple Airlines
Fri 9/2611:35 amIAD - YOW
1 stop6h 34mMultiple Airlines
Deal found 7/29$347
This United deal was found by Cheapflights users on 7/29. 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.
Sun 9/1410:25 amYOW - DCA
Nonstop1h 43mMultiple Airlines
Fri 9/196:00 amDCA - YOW
1 stop4h 24mMultiple Airlines
Deal found 7/29$354
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Wed 8/276:10 amYOW - BWI
3 stops24h 44mMultiple Airlines
Wed 9/35:45 amBWI - YOW
3 stops25h 00mMultiple Airlines
Deal found 7/30$384
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/285:55 amYOW - BWI
2 stops17h 22mWestJet
Sun 8/315:40 amBWI - YOW
2 stops18h 42mWestJet
Deal found 7/29$547

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 July 31, 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

Sun 9/14

8:35 am-3:06 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Fri 9/19

4:20 pm-8:34 pm

1 stop4h 14m

$237

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Mon 9/8

10:25 am-12:08 pm

Nonstop1h 43m

Washington, D.C. Reagan-National

Fri 9/12

6:00 am-10:24 am

1 stop4h 24m

$275

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 9/13

7:29 pm-9:12 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 9/14

6:20 am-11:45 am

1 stop5h 25m

$285

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 9/13

2:48 pm-8:41 pm

1 stop5h 53m

Washington, D.C. Dulles Intl

Sun 9/14

8:16 am-9:58 am

Nonstop1h 42m

$288

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Thu 8/21

6:33 am-11:59 am

1 stop5h 26m

Washington, D.C. Reagan-National

Mon 8/25

1:00 pm-4:43 pm

1 stop3h 43m

$308

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 1/15

2:50 pm-8:59 pm

1 stop6h 09m

Washington, D.C. Dulles Intl

Mon 1/19

9:00 am-3:23 pm

1 stop6h 23m

$322

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 9/23

5:55 am-3:06 pm

1 stop9h 11m

Washington, D.C. Dulles Intl

Fri 9/26

11:35 am-6:09 pm

1 stop6h 34m

$347

OttawaWashington, D.C.

YOW - DCA

YOWDCA

Ottawa

Sun 9/14

10:25 am-12:08 pm

Nonstop1h 43m

Washington, D.C. Reagan-National

Fri 9/19

6:00 am-10:24 am

1 stop4h 24m

$354

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Wed 8/27

6:10 am-6:54 am

3 stops24h 44m

Baltimore/Washington

Wed 9/3

5:45 am-6:45 am

3 stops25h 00m

$384

OttawaBaltimore

YOW - BWI

YOWBWI

Ottawa

Thu 8/28

5:55 am-11:17 pm

2 stops17h 22m

Baltimore/Washington

Sun 8/31

5:40 am-12:22 am

2 stops18h 42m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 23 results
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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 July 25, 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 $241). Flying from Ottawa to Washington, D.C. in March is currently the most expensive (average of $290). 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 July 31, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 54% 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 July 31, 2025.

The most flights from YOW to WAS are scheduled on a Monday (8 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 July 31, 2025.
See what other customers who have flown with Porter Airlines, Delta, and United Airlines 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
8.0
Very good
318 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Food

7.6

Crew

8.7

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
318 reviews
Porter Airlines
8.0
Very good
318 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Food

7.6

Crew

8.7

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,981 reviews
Porter Airlines
8.0
Very good
318 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Food

7.6

Crew

8.7

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,900 reviews
Porter Airlines
8.0
Very good
318 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Food

7.6

Crew

8.7

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
2,978 reviews
Porter Airlines
8.0
Very good
318 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Food

7.6

Crew

8.7

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
9,851 reviews
Porter Airlines
8.0
Very good
318 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Food

7.6

Crew

8.7

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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.

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

    Porter Airlines, at $237, was found to be the cheapest airline from Ottawa to Washington, D.C..Alternate airlines to your destination round-trip include Air Canada and Lufthansa. These flights start at 31% 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 ($145), Air Canada ($162), and United Airlines ($178).

  • 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..

  • 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 $241). Flying from Ottawa to Washington, D.C. in March is currently the most expensive (average of $290). 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
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$197Average$335FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$240Average$429FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$275Average$449FlexibilityNo cancel feeOn-time67%

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