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$124+ Cheap flights from Dulles Intl (IAD) to Ottawa (YOW)

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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheap flight deals from Dulles Intl to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Ottawa (YOW). 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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(Kiwi.com)

One-way from

$124
(Kiwi.com)

Popular in

May

Cheapest in

April

Average price

$479

Good round-trip deal

$423 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Ottawa flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Ottawa flights.
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From Washington, D.C. Dulles Intl to Ottawa
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One-way flight from Washington, D.C. Dulles Intl to Ottawa
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Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Ottawa.
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Find flight deals from Dulles Intl to Ottawa

Cheapest flights from Dulles Intl to Ottawa
Explore the most affordable flight options available from Dulles Intl to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 20, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Mon 11/178:37 pmIAD - YOW
1 stop20h 36mMultiple Airlines
Mon 11/249:30 amYOW - IAD
1 stop22h 15mMultiple Airlines
Deal found 10/18$289
This Kiwi.com deal was found by Cheapflights users on 10/17. 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.
Mon 11/2411:40 amIAD - YOW
1 stop3h 24mPorter Airlines
Tue 11/2512:10 pmYOW - IAD
1 stop5h 04mPorter Airlines
Deal found 10/17$315
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 11/136:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Tue 11/1812:10 pmYOW - IAD
1 stop5h 04mPorter Airlines
Deal found 10/18$320
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sun 11/166:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Wed 11/196:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Deal found 10/19$322
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 11/136:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Wed 11/196:50 amYOW - IAD
1 stop3h 34mPorter Airlines
Deal found 10/19$325
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/126:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Tue 11/1812:10 pmYOW - IAD
1 stop5h 04mPorter Airlines
Deal found 10/20$326
This Mytrip deal was found by Cheapflights users on 10/18. 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 11/81:45 pmIAD - YOW
1 stop3h 44mPorter Airlines
Wed 11/1211:40 amYOW - IAD
1 stop5h 34mPorter Airlines
Deal found 10/18$335
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 11/18:36 pmIAD - YOW
1 stop21h 37mMultiple Airlines
Sun 11/91:20 pmYOW - IAD
1 stop3h 54mMultiple Airlines
Deal found 10/19$338
This Trip.com deal was found by Cheapflights users on 10/19. 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 12/1811:40 amIAD - YOW
1 stop3h 24mPorter Airlines
Mon 12/221:20 pmYOW - IAD
1 stop3h 54mPorter Airlines
Deal found 10/19$345
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 11/136:30 pmIAD - YOW
1 stop3h 59mPorter Airlines
Sun 11/161:20 pmYOW - IAD
1 stop3h 54mPorter Airlines
Deal found 10/18$347
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/128:40 amIAD - YOW
2 stops27h 55mMultiple Airlines
Tue 11/1812:10 pmYOW - IAD
1 stop5h 04mMultiple Airlines
Deal found 10/20$352

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Ottawa 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 October 20, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ottawa that are best for you.

Fly from

Dulles Intl

Fly to

Ottawa

Route

Depart

Return

Price

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 11/13

6:30 pm-10:29 pm

1 stop3h 59m

Ottawa

Tue 11/18

12:10 pm-5:14 pm

1 stop5h 04m

$325

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 11/13

6:30 pm-10:29 pm

1 stop3h 59m

Ottawa

Wed 11/19

6:50 am-10:24 am

1 stop3h 34m

$325

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 11/14

6:30 pm-10:29 pm

1 stop3h 59m

Ottawa

Sun 11/16

1:20 pm-5:14 pm

1 stop3h 54m

$371

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 11/7

11:40 am-5:29 pm

1 stop5h 49m

Ottawa

Tue 11/11

12:10 pm-5:14 pm

1 stop5h 04m

$379

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 11/13

8:36 pm-5:25 pm

2 stops20h 49m

Ottawa

Wed 11/19

6:50 am-10:24 am

1 stop3h 34m

$388

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 11/22

1:45 pm-5:29 pm

1 stop3h 44m

Ottawa

Sat 11/29

2:15 pm-4:09 pm

Nonstop1h 54m

$390

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 11/22

1:45 pm-5:29 pm

1 stop3h 44m

Ottawa

Sat 11/29

8:40 am-12:29 pm

1 stop3h 49m

$409

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 11/14

11:40 am-3:04 pm

1 stop3h 24m

Ottawa

Sat 11/15

8:40 am-12:29 pm

1 stop3h 49m

$428

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 11/8

1:45 pm-12:42 am

1 stop10h 57m

Ottawa

Wed 11/12

6:50 am-10:24 am

1 stop3h 34m

$430

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 11/16

6:30 pm-10:29 pm

1 stop3h 59m

Ottawa

Sun 11/23

1:20 pm-5:14 pm

1 stop3h 54m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 21 results
1
2
3

Compare providers for flights from Dulles Intl to Ottawa

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

Have a flexible travel schedule? Discover the best time to fly to Ottawa from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Ottawa

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $113). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in August is currently the most expensive (average of $255). 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 IAD to YOW?

Find hourly flight availability from Dulles Intl to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 20, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Ottawa, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 25% versus a flight in the afternoon.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Ottawa?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Ottawa. Price data was last updated on October 12, 2025.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Ottawa flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated October 20, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Ottawa, such as Porter Airlines, United Airlines, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
381 reviews

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Comfort

8.0

Boarding

8.2

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
8.0
Very good
381 reviews
Porter Airlines
8.0
Very good
381 reviews

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Comfort

8.0

Boarding

8.2

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
8,993 reviews
Porter Airlines
8.0
Very good
381 reviews

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Comfort

8.0

Boarding

8.2

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
10,334 reviews
Porter Airlines
8.0
Very good
381 reviews

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Comfort

8.0

Boarding

8.2

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 Dulles Intl to Ottawa. 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 into for flights to Ottawa from Washington, D.C. Dulles Intl?

    Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Ottawa. 3 airlines have flights to Ottawa from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Ottawa should not be difficult; the airport handles an average of 7 inbound flights from Washington, D.C. Dulles Intl per day.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Ottawa can take about 3h 59m. Porter Airlines provides one of the quickest options available for as low as $325. There are 449 mi between Washington, D.C. Dulles Intl Airport and Ottawa.

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

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Ottawa is Porter Airlines. Our recent data shows that you can find tickets from as low as $179 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $206 and $241 round-trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Ottawa for 57% less than the average price by searching for these airlines.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to Ottawa on time: GoJet (80%), Air Canada (80%), United Airlines (80%).

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

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Ottawa is $214. On average you can expect to pay $496. The most popular route, (Washington, D.C. Dulles Intl - Ottawa), can usually be booked for $322.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Ottawa 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 Washington, D.C. Dulles Intl Airport to Ottawa?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $113). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in August is currently the most expensive (average of $255). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Petawawa

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Alternative routes for Dulles Intl to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Dulles Intl to Ottawa

Discover the top 3 airlines that operate flights from Dulles Intl to Ottawa. 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$179Average$332FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$206Average$483FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$241Average$477FlexibilityNo cancel feeOn-time69%

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