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$129+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Ottawa are usually found in March or April, booked 45 days in advance, depart on a Saturday or Friday and return on a Wednesday

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 August 16, 2025.

Round-trip from

$316
(Kiwi.com)

One-way from

$129
(Kiwi.com)

Popular in

September

Cheapest in

March

Average price

$507

Good round-trip deal

$427 or less

Good one-way deal

$263 or less
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. 16% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in August 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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Price to beat on a one-way 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 August 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/24:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Thu 9/47:00 amYOW - IAD
1 stop3h 16mPorter Airlines
Deal found 8/12$309
This Kiwi.com deal was found by Cheapflights users on 8/15. 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.
Sun 9/147:14 pmIAD - YOW
2 stops25h 21mMultiple Airlines
Sun 9/214:25 pmYOW - IAD
1 stop25h 59mMultiple Airlines
Deal found 8/15$316
This Trip.com deal was found by Cheapflights users on 8/13. 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 9/84:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Mon 9/157:00 amYOW - IAD
1 stop3h 16mPorter Airlines
Deal found 8/13$319
This Trip.com deal was found by Cheapflights users on 8/13. 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.
Sat 9/69:35 amIAD - YOW
1 stop4h 16mMultiple Airlines
Sun 9/77:00 amYOW - IAD
1 stop3h 16mMultiple Airlines
Deal found 8/13$325
This Trip.com deal was found by Cheapflights users on 8/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/24:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Sun 10/58:35 amYOW - IAD
1 stop6h 31mPorter Airlines
Deal found 8/15$326
This Kiwi.com deal was found by Cheapflights users on 8/15. 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.
Mon 9/296:45 pmIAD - YOW
1 stop18h 15mMultiple Airlines
Mon 10/67:00 amYOW - IAD
2 stops11h 24mMultiple Airlines
Deal found 8/15$327
This Trip.com deal was found by Cheapflights users on 8/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Fri 9/199:35 amYOW - IAD
1 stop5h 31mPorter Airlines
Deal found 8/15$328
This Vliegwinkel deal was found by Cheapflights users on 8/14. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Sun 9/77:00 amYOW - IAD
1 stop3h 16mPorter Airlines
Deal found 8/14$330
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/104:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Wed 9/1711:00 amYOW - IAD
1 stop4h 06mPorter Airlines
Deal found 8/13$331
This Trip.com deal was found by Cheapflights users on 8/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2911:35 amIAD - YOW
1 stop4h 59mPorter Airlines
Mon 10/611:00 amYOW - IAD
1 stop4h 06mPorter Airlines
Deal found 8/15$332
This Kiwi.com deal was found by Cheapflights users on 8/15. 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.
Fri 10/109:38 pmIAD - YOW
1 stop19h 19mMultiple Airlines
Wed 10/154:25 pmYOW - IAD
1 stop26h 42mMultiple Airlines
Deal found 8/15$337
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/24:20 pmIAD - YOW
1 stop4h 14mMultiple Airlines
Thu 9/47:00 amYOW - IAD
2 stops11h 24mMultiple Airlines
Deal found 8/12$341

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 August 16, 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

Sun 9/14

7:14 pm-8:35 pm

2 stops25h 21m

Ottawa

Sun 9/21

4:25 pm-6:24 pm

1 stop25h 59m

$316

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 9/29

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Mon 10/6

9:35 am-3:06 pm

1 stop5h 31m

$316

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 10/2

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Sun 10/5

8:35 am-3:06 pm

1 stop6h 31m

$326

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 9/29

6:45 pm-1:00 pm

1 stop18h 15m

Ottawa

Mon 10/6

7:00 am-6:24 pm

2 stops11h 24m

$327

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 9/12

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Fri 9/19

9:35 am-3:06 pm

1 stop5h 31m

$328

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 9/4

7:14 pm-4:57 pm

1 stop21h 43m

Ottawa

Wed 9/24

11:00 am-3:06 pm

1 stop4h 06m

$330

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 9/4

4:20 pm-8:34 pm

1 stop4h 14m

Ottawa

Sun 9/7

7:00 am-10:16 am

1 stop3h 16m

$330

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 10/10

9:38 pm-4:57 pm

1 stop19h 19m

Ottawa

Wed 10/15

4:25 pm-7:07 pm

1 stop26h 42m

$337

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 10/10

11:35 am-4:34 pm

1 stop4h 59m

Ottawa

Fri 10/17

11:00 am-3:06 pm

1 stop4h 06m

$341

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 9/14

4:20 pm-7:59 pm

1 stop3h 39m

Ottawa

Sun 9/21

8:35 am-3:06 pm

1 stop6h 31m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 22 results
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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

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Ottawa?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Ottawa. Price data was last updated on August 8, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Ottawa is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $294). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in September is currently the most expensive (average of $428). 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 August 16, 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 31% 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 August 10, 2025.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Ottawa flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday afternoons 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 August 16, 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
332 reviews

Boarding

8.2

Comfort

8.0

Crew

8.7

Overall

8.0

Entertainment

7.0

Food

7.6

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
332 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Crew

8.7

Overall

8.0

Entertainment

7.0

Food

7.6

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
8,916 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Crew

8.7

Overall

8.0

Entertainment

7.0

Food

7.6

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
9,966 reviews
Porter Airlines
8.0
Very good
332 reviews

Boarding

8.2

Comfort

8.0

Crew

8.7

Overall

8.0

Entertainment

7.0

Food

7.6

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 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 5 inbound flights from Washington, D.C. Dulles Intl per day.

  • 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 $182 and $271 round-trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Ottawa for 56% 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 (72%), Air Canada (72%), United Airlines (72%).

  • 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 $139. On average you can expect to pay $566. The most popular route, (Washington, D.C. Dulles Intl - Ottawa), can usually be booked for $312.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $294). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in September is currently the most expensive (average of $428). 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 August 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$179Average$339FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$182Average$472FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$271Average$487FlexibilityNo cancel feeOn-time69%

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