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$136+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 70 days in advance, depart on a Saturday or Thursday 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 June 30, 2025.

Round-trip from

$305
(Trip.com)

One-way from

$136
(Gotogate)

Popular in

May

Cheapest in

March

Average price

$448

Good round-trip deal

$385 or less

Good one-way deal

$229 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. 11% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/114:20 pmIAD - YOW
1 stop4h 14mPorter Airlines
Fri 9/127:00 amYOW - IAD
1 stop3h 16mPorter Airlines
Deal found 6/28$309
This Mytrip deal was found by Cheapflights users on 6/28. 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.
Tue 8/124:10 pmIAD - YOW
1 stop4h 53mMultiple Airlines
Tue 8/195:15 amYOW - IAD
1 stop4h 22mMultiple Airlines
Deal found 6/28$337
This Air Canada deal was found by Cheapflights users on 6/30. 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.
Sat 7/1910:20 amIAD - YOW
1 stop4h 45mAir Canada
Sat 7/268:35 amYOW - IAD
1 stop5h 07mAir Canada
Deal found 6/30$373
This United Airlines deal was found by Cheapflights users on 6/29. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/58:18 amIAD - YOW
Nonstop1h 40mUnited Airlines
Wed 8/137:29 pmYOW - IAD
Nonstop1h 35mUnited Airlines
Deal found 6/29$377

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 June 30, 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

Fri 8/22

11:35 am-5:03 pm

1 stop5h 28m

Ottawa

Sun 8/24

9:35 am-2:56 pm

1 stop5h 21m

$305

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 8/12

4:10 pm-9:03 pm

1 stop4h 53m

Ottawa

Tue 8/19

5:15 am-9:37 am

1 stop4h 22m

$337

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 7/19

10:20 am-3:05 pm

1 stop4h 45m

Ottawa

Sat 7/26

8:35 am-1:42 pm

1 stop5h 07m

$373

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 8/25

12:35 pm-2:13 pm

Nonstop1h 38m

Ottawa

Fri 8/29

9:50 am-11:33 am

Nonstop1h 43m

$377

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 10/24

4:20 pm-8:34 pm

1 stop4h 14m

$144

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 8/23

8:16 am-9:58 am

Nonstop1h 42m

$164

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 7/14

10:20 am-3:05 pm

1 stop4h 45m

$165

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 10/6

6:45 pm-4:19 pm

2 stops21h 34m

$234

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Mon 7/28

5:40 pm-5:15 pm

3 stops23h 35m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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 June 27, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Ottawa is 67 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 June 30, 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 29% 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 June 29, 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 evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Ottawa

Explore weekly flight availability from Dulles Intl to Ottawa. 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 June 30, 2025.

The most flights from IAD to YOW are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

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 June 30, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Ottawa, such as Porter Airlines, United Airlines, and WestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
296 reviews

Comfort

8.1

Boarding

8.2

Entertainment

7.0

Crew

8.7

Overall

8.0

Food

7.6

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Porter Airlines
8.0
Very good
296 reviews
Porter Airlines
8.0
Very good
296 reviews

Comfort

8.1

Boarding

8.2

Entertainment

7.0

Crew

8.7

Overall

8.0

Food

7.6

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
United Airlines
7.4
Good
8,852 reviews
Porter Airlines
8.0
Very good
296 reviews

Comfort

8.1

Boarding

8.2

Entertainment

7.0

Crew

8.7

Overall

8.0

Food

7.6

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
WestJet
7.2
Good
2,908 reviews
Porter Airlines
8.0
Very good
296 reviews

Comfort

8.1

Boarding

8.2

Entertainment

7.0

Crew

8.7

Overall

8.0

Food

7.6

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Air Canada
7.1
Good
9,654 reviews
Porter Airlines
8.0
Very good
296 reviews

Comfort

8.1

Boarding

8.2

Entertainment

7.0

Crew

8.7

Overall

8.0

Food

7.6

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!

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.

  • 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 $305 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $336 and $377 round-trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Ottawa for 21% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Ottawa one-way?

    $136 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from $164 and $165, respectively.

  • 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 $164. On average you can expect to pay $428. The most popular route, (Washington, D.C. Dulles Intl - Ottawa), can usually be booked for $283.

  • 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport 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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Dulles Intl to Timmins flights
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Baltimore to Windsor flights
Dulles Intl to Kingston flights
Reagan-National to Kingston flights
Baltimore to Kingston flights

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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$182Average$478FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$188Average$343FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$271Average$519FlexibilityNo cancel feeOn-time69%

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