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$153+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
Aug 6 — Aug 131
Thu 8/6
Thu 8/13
1 adult, Economy
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Cheap 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 July 7, 2026.

This Trip.com deal was found by Cheapflights users on 7/6. 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 8/203:50 pm
IAD
-
YOW
1 stop5h 54m
Porter Airlines
Thu 8/2710:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/6$318
This Trip.com deal was found by Cheapflights users on 7/3. 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 7/283:55 pm
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Thu 7/3010:40 am
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Deal found 7/3$323
This Trip.com deal was found by Cheapflights users on 7/3. 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 8/73:50 pm
IAD
-
YOW
1 stop4h 14m
Porter Airlines
Sun 8/910:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/3$330
This Trip.com deal was found by Cheapflights users on 7/3. 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 8/23:50 pm
IAD
-
YOW
1 stop5h 54m
Porter Airlines
Sun 8/910:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/3$332
This Trip.com deal was found by Cheapflights users on 7/4. 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 7/263:55 pm
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Wed 7/2910:40 am
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Deal found 7/4$334
This Trip.com deal was found by Cheapflights users on 7/5. 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 7/273:55 pm
IAD
-
YOW
1 stop4h 09m
Porter Airlines
Wed 7/2910:40 am
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Deal found 7/5$335
This Trip.com deal was found by Cheapflights users on 7/5. 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 10/83:50 pm
IAD
-
YOW
1 stop5h 54m
Porter Airlines
Sun 10/1110:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/5$336
This Trip.com deal was found by Cheapflights users on 7/5. 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 7/283:55 pm
IAD
-
YOW
1 stop5h 49m
Porter Airlines
Fri 7/3110:40 am
YOW
-
IAD
1 stop4h 31m
Porter Airlines
Deal found 7/5$337
This Trip.com deal was found by Cheapflights users on 7/3. 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.
Wed 8/511:25 am
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Thu 8/610:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/3$338
This Trip.com deal was found by Cheapflights users on 7/4. 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 8/1611:25 am
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Wed 8/1910:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/4$340
This Trip.com deal was found by Cheapflights users on 7/5. 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 8/153:50 pm
IAD
-
YOW
1 stop3h 24m
Porter Airlines
Tue 8/1810:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/5$341
This Trip.com deal was found by Cheapflights users on 7/5. 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 9/1811:25 am
IAD
-
YOW
1 stop6h 29m
Porter Airlines
Sun 9/2010:40 am
YOW
-
IAD
1 stop4h 30m
Porter Airlines
Deal found 7/5$348

Find 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 July 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(Trip.com)

One-way from

$153
(Trip.com)

Popular in

February

Cheapest in

December

Average price

$489

Good round-trip deal

$500 or less

Good one-way deal

$233 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Ottawa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Ottawa flights.
Search Deals
From Washington, D.C. Dulles Intl to Ottawa
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Ottawa
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Ottawa.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Ottawa.
Search Deals

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 July 7, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 10/12

3:50 pm-8:04 pm

1 stop4h 14m

Ottawa

Fri 10/23

10:40 am-3:10 pm

1 stop4h 30m

$423
Quickest round-trip

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 10/6

8:15 am-9:56 am

Nonstop1h 41m

Ottawa

Thu 10/15

6:00 am-7:43 am

Nonstop1h 43m

$483

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 9/1

12:35 pm-2:17 pm

Nonstop1h 42m

Ottawa

Fri 9/4

10:00 am-11:44 am

Nonstop1h 44m

$492

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 7/23

10:10 pm-11:54 pm

Nonstop1h 44m

Ottawa

Mon 7/27

6:00 am-7:44 am

Nonstop1h 44m

$500

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 7/31

8:18 am-10:03 am

Nonstop1h 45m

Ottawa

Mon 8/3

6:00 am-7:44 am

Nonstop1h 44m

$500

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 8/7

5:06 pm-6:48 pm

Nonstop1h 42m

Ottawa

Sun 8/9

6:00 am-7:44 am

Nonstop1h 44m

$500

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 7/19

12:35 pm-2:17 pm

Nonstop1h 42m

Ottawa

Wed 7/22

6:00 am-7:44 am

Nonstop1h 44m

$500

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 7/17

10:20 pm-1:59 pm

1 stop15h 39m

Ottawa

Sun 7/19

6:00 am-7:44 am

Nonstop1h 44m

$510

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 8/5

3:39 pm-9:35 pm

1 stop5h 56m

Ottawa

Thu 8/6

6:05 am-11:28 am

1 stop5h 23m

$525

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 8/3

5:06 pm-6:48 pm

Nonstop1h 42m

Ottawa

Mon 8/10

6:00 am-7:44 am

Nonstop1h 44m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/7

Showing 1-10 of 22 resultsSorted by cheapest first
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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 July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $358). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of $755). 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 July 7, 2026.

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 in the morning, which can drop the price by up to 52% versus a flight at noon.

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

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 July 7, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Ottawa, such as Porter Airlines,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
442 reviews

Crew

8.6

Entertainment

6.9

Comfort

7.9

Overall

7.9

Boarding

8.2

Food

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Porter Airlines
7.9
Good
442 reviews
Porter Airlines
7.9
Good
442 reviews

Crew

8.6

Entertainment

6.9

Comfort

7.9

Overall

7.9

Boarding

8.2

Food

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
United Airlines
7.4
Good
9,945 reviews
Porter Airlines
7.9
Good
442 reviews

Crew

8.6

Entertainment

6.9

Comfort

7.9

Overall

7.9

Boarding

8.2

Food

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Air Canada
7.1
Good
11,319 reviews
Porter Airlines
7.9
Good
442 reviews

Crew

8.6

Entertainment

6.9

Comfort

7.9

Overall

7.9

Boarding

8.2

Food

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

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 8 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 1h 41m. Porter Airlines provides one of the quickest options available for as low as $483. There are 449 mi between Washington, D.C. Dulles Intl Airport and Ottawa. This flight may include one or multiple stops.

  • 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 $169 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $206 and $230 round-trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Ottawa for 67% 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: Republic Airways (88%), Avianca (85%), United Airlines (85%).

  • 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 $439. The most popular route, (Washington, D.C. Dulles Intl - Ottawa), can usually be booked for $318.

  • 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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of $358). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in February is currently the most expensive (average of $755). 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

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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 July 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$169Average$365FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$206Average$547FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$230Average$514FlexibilityNo cancel feeOn-time69%

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