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Dulles Intl

$135+ Cheap flights from Ottawa (YOW) to Dulles Intl (IAD)

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 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — IAD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Find flight deals from Ottawa to Dulles Intl

Cheapest flights from Ottawa to Dulles Intl
Explore the most affordable flight options available from Ottawa to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This Trip.com deal was found by Cheapflights users on 11/25. 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 12/196:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Sun 12/2111:40 amIAD - YOW
1 stop5h 49mPorter Airlines
Deal found 11/25$285
This Porter Airlines deal was found by Cheapflights users on 11/24. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:10 pmYOW - IAD
1 stop5h 04mPorter Airlines
Tue 12/306:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/24$290
This Porter Airlines deal was found by Cheapflights users on 11/24. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Mon 12/296:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/24$297
This Mytrip deal was found by Cheapflights users on 11/25. 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.
Fri 12/267:27 pmYOW - IAD
Nonstop1h 58mMultiple Airlines
Tue 12/306:30 pmIAD - YOW
1 stop3h 59mMultiple Airlines
Deal found 11/25$299
This Mytrip deal was found by Cheapflights users on 11/24. 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 12/138:40 amYOW - IAD
1 stop3h 49mPorter Airlines
Sun 12/146:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/24$300
This United Airlines deal was found by Cheapflights users on 11/23. 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.
Mon 12/227:27 pmYOW - IAD
Nonstop1h 58mUnited Airlines
Mon 12/2910:08 pmIAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 11/23$308
This oojo deal was found by Cheapflights users on 11/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/201:20 pmYOW - IAD
1 stop3h 54mPorter Airlines
Sat 1/311:35 amIAD - YOW
1 stop6h 04mPorter Airlines
Deal found 11/24$311
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Fri 12/265:59 pmYOW - IAD
1 stop5h 07mUnited Airlines
Tue 12/3010:08 pmIAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 11/24$314
This FlightHub deal was found by Cheapflights users on 11/25. 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.
Sat 12/138:40 amYOW - IAD
1 stop3h 49mPorter Airlines
Sat 1/36:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/25$316
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Fri 12/267:27 pmYOW - IAD
Nonstop1h 58mUnited Airlines
Wed 12/3110:08 pmIAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 11/24$322

Cheap flight deals from Ottawa to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Dulles Intl (IAD). 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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$280
(Mytrip)

One-way from

$135
(Mytrip)

Popular in

August

Cheapest in

April

Average price

$448

Good round-trip deal

$468 or less

Good one-way deal

$203 or less
Provider with most accurate pricing for Ottawa-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-Washington, D.C. Dulles Intl flights.
Search Deals
From Ottawa to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Ottawa to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Ottawa to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Ottawa to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Dulles Intl 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 November 26, 2025.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Ottawa

Fly to

Dulles Intl

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 1/10

4:15 pm-8:26 pm

1 stop4h 11m

Washington, D.C. Dulles Intl

Sat 1/17

9:45 am-2:07 pm

1 stop4h 22m

$280

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 1/26

7:00 am-10:19 am

1 stop3h 19m

Washington, D.C. Dulles Intl

Fri 2/6

11:40 am-5:29 pm

1 stop5h 49m

$281

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 1/10

4:20 pm-7:40 am

1 stop15h 20m

Washington, D.C. Dulles Intl

Sat 1/17

9:33 am-11:58 pm

1 stop14h 25m

$286

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 12/26

1:20 pm-5:14 pm

1 stop3h 54m

Washington, D.C. Dulles Intl

Tue 12/30

6:30 pm-10:29 pm

1 stop3h 59m

$290

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 1/22

7:00 am-10:19 am

1 stop3h 19m

Washington, D.C. Dulles Intl

Mon 1/26

11:35 am-5:29 pm

1 stop5h 54m

$293

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 1/26

7:00 am-10:19 am

1 stop3h 19m

Washington, D.C. Dulles Intl

Thu 2/5

11:40 am-5:29 pm

1 stop5h 49m

$293

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 12/13

2:17 pm-4:11 pm

Nonstop1h 54m

Washington, D.C. Dulles Intl

Sun 12/14

8:45 am-1:36 pm

1 stop4h 51m

$297

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 12/22

6:50 am-10:24 am

1 stop3h 34m

Washington, D.C. Dulles Intl

Mon 12/29

6:30 pm-10:29 pm

1 stop3h 59m

$297

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 1/17

10:20 am-3:46 pm

1 stop5h 26m

Washington, D.C. Dulles Intl

Sun 1/18

9:45 am-2:03 pm

1 stop4h 18m

$300

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 12/22

7:27 pm-9:25 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

Mon 12/29

10:08 pm-11:54 pm

Nonstop1h 46m

$308

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 22 results
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Compare providers for flights from Ottawa to Dulles Intl

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 Dulles Intl in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 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. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ottawa-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust eDreams the most. eDreams 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. Dulles Intl Airport 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 Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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. Dulles Intl Airport

What is the cheapest month to book a flight from Ottawa to Washington, D.C. Dulles Intl Airport?

Currently, March is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of $158). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of $270). 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 IAD?

Find hourly flight availability from Ottawa to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 26, 2025.

One of the essential ways to save on airfare from Ottawa to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 9% on airfare.

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

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated November 26, 2025.
Get a feel of what it's like to fly with Porter Airlines, United Airlines, and Air Canada from Ottawa to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
394 reviews

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
394 reviews
Porter Airlines
8.0
Very good
394 reviews

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,046 reviews
Porter Airlines
8.0
Very good
394 reviews

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,476 reviews
Porter Airlines
8.0
Very good
394 reviews

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Dulles Intl. 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. Dulles Intl?

    Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly out of when you book flights from Ottawa to Washington, D.C. Dulles Intl. 3 airlines have flights from Ottawa to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Ottawa to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 5 outbound flights to Washington, D.C. Dulles Intl per day.

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

    Air Canada and Porter Airlines can get you from Ottawa to Washington, D.C. Dulles Intl Airport in just under 3h 19m. Your travel time can differ by up to 52m. Ottawa and Washington, D.C. Dulles Intl Airport are separated by a distance of 449 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Porter Airlines, at $197, was found to be the cheapest airline from Ottawa to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include United Airlines and Air Canada. These flights start at 51% lower than the current average price 3 months from now.

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

    Consider Avianca (82%), Republic Airways (76%) or United Airlines (75%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to Washington, D.C. Dulles Intl Airport.

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

    On average you can expect to pay $518 for a flight from Ottawa to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $176 while the most popular route, (Ottawa - Washington, D.C. Dulles Intl) is currently priced at $233.

  • Can I find deals for flights from Ottawa to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Ottawa to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Dulles Intl.

  • Can I find deals for business class flights from Ottawa to Dulles Intl?

    Yes. Cheapflights offers flight deals from Ottawa to Dulles Intl 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. Dulles Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of $158). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of $270). 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. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Falls Church
Bowie
Largo
McLean
Clinton

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Top 3 airlines flying from Ottawa to Dulles Intl

Discover the top 3 airlines that operate flights from Ottawa to Dulles Intl. 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$197Average$307FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$281Average$465FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$384Average$446FlexibilityNo cancel feeOn-time67%

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