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Cheap flights from Washington, D.C. Dulles Intl Airport to Ottawa from C$ 139

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 22/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YOW
17 Jun — 24 Jun1
1 adult

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 Wednesday and return on a Friday

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 12 June 2025.

Round-trip from

C$ 349

One-way from

C$ 139

Popular in

May

Cheapest in

March

Average price

C$ 588

Good one-way deal

C$ 515 or less
Porter Airlines
  • Porter Airlines
  • 31/10-3/11
  • 2 total stops
  • 6h 43m total
  • Washington, D.C. to Ottawa
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Porter Airlines
  • Porter Airlines
  • 22/7
  • 1 total stop
  • 3h 28m total
  • Washington, D.C. to Ottawa
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 83 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 34 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 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 12 June 2025.

Fri 31/106:30 p.m.IAD - YOW
1 stop3h 24mPorter Airlines
Mon 3/119:40 a.m.YOW - IAD
1 stop3h 19mPorter Airlines
Deal found 11/6C$ 349
Wed 9/74:10 p.m.IAD - YOW
1 stop8h 12mMultiple Airlines
Thu 17/711:00 a.m.YOW - IAD
1 stop3h 56mMultiple Airlines
Deal found 10/6C$ 422
Sat 6/99:45 a.m.IAD - YOW
1 stop4h 06mAir Canada
Mon 8/92:40 p.m.YOW - IAD
1 stop6h 25mAir Canada
Deal found 10/6C$ 439
Thu 3/78:18 a.m.IAD - YOW
Nonstop1h 40mUnited Airlines
Wed 23/79:50 a.m.YOW - IAD
Nonstop1h 39mUnited Airlines
Deal found 10/6C$ 565

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 629,999 searches. Data last updated 12 June 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 31/10

6:30 p.m.-9:54 p.m.

1 stop3h 24m

Ottawa

Mon 3/11

9:40 a.m.-12:59 p.m.

1 stop3h 19m

C$ 349

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 9/7

4:10 p.m.-12:22 a.m.

1 stop8h 12m

Ottawa

Thu 17/7

11:00 a.m.-2:56 p.m.

1 stop3h 56m

C$ 422

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sat 6/9

9:45 a.m.-1:51 p.m.

1 stop4h 06m

Ottawa

Mon 8/9

2:40 p.m.-9:05 p.m.

1 stop6h 25m

C$ 439

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 3/7

8:18 a.m.-9:58 a.m.

Nonstop1h 40m

Ottawa

Wed 23/7

9:50 a.m.-11:29 a.m.

Nonstop1h 39m

C$ 565

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Wed 13/8

6:45 p.m.-6:45 a.m.

1 stop12h 00m

Ottawa

Mon 18/8

5:55 a.m.-4:30 p.m.

2 stops10h 35m

C$ 856

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Tue 22/7

4:10 p.m.-7:38 p.m.

1 stop3h 28m

C$ 139

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 25/9

9:45 a.m.-1:51 p.m.

1 stop4h 06m

C$ 168

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Fri 18/7

11:35 a.m.-12:22 a.m.

1 stop12h 47m

C$ 178

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 6/7

8:18 a.m.-9:58 a.m.

Nonstop1h 40m

C$ 243

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Sun 13/7

12:12 p.m.-6:45 a.m.

2 stops18h 33m

C$ 722

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 11 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 9 June 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, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 224). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in December is currently the most expensive (average of C$ 326). 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 12 June 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Ottawa in the afternoon. Doing so could potentially save you 58% on the flight price compared to flying at noon, which is usually more expensive.

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 12 June 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).

Rainfall in Ottawa by month

Plan your trip to Ottawa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ottawa ranges from 50.0 - 93.0 mm per month. June is typically the wettest month, when rainfall can reach 93.0 mm. February is typically the driest time to visit Ottawa when rainfall is around 50.0 mm.

Temperature in Ottawa by month

Plan your trip to Ottawa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ottawa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -10.0 C).

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

Overall

8.0

Entertainment

7.0

Food

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

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
288 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Overall

8.0

Entertainment

7.0

Food

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

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!!!
Delta
8.0
Very good
7,950 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Overall

8.0

Entertainment

7.0

Food

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

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
8,790 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Overall

8.0

Entertainment

7.0

Food

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

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
2,868 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Overall

8.0

Entertainment

7.0

Food

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

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
9,531 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Overall

8.0

Entertainment

7.0

Food

7.6

Boarding

8.2

Comfort

8.1

Crew

8.7

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?

    Most people fly into Ottawa (YOW) if they book a flight to Ottawa from Washington, D.C. Dulles Intl. On average, Ottawa has 7 inbound flights from Washington, D.C. Dulles Intl per day from 2 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

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

    Currently priced at C$ 349, Porter Airlines will fly you from Washington, D.C. Dulles Intl Airport to Ottawa and back. In addition to Porter Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and United Airlines - these airlines can fly you to your destination from C$ 439 and C$ 565, respectively. Porter Airlines is currently priced 34% below the average price you’ll pay for this route.

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

    For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as C$ 139. Users have also found prices from C$ 168 and C$ 243 on Air Canada and United Airlines, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Ottawa consider choosing Air Canada (79%), GoJet (77%) or United Airlines (77%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay C$ 533 for a flight from Washington, D.C. Dulles Intl Airport to Ottawa. The cheapest flight overall is C$ 256 while the most popular route, (Washington, D.C. Dulles Intl - Ottawa) is currently priced at C$ 349.

  • 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, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ottawa (average of C$ 224). Flying from Washington, D.C. Dulles Intl Airport to Ottawa in December is currently the most expensive (average of C$ 326). 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

Travelling 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
Brockville
Perth
Smiths Falls
Prescott
Pembroke
Wakefield
Lanark

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Top 2 airlines flying from Dulles Intl to Ottawa

Discover the top 2 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 629,999 searches. Data last updated 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 224AverageC$ 542FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 388AverageC$ 476FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Dulles Intl to Ottawa?

When you search for this flight from Dulles Intl to Ottawa, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Ottawa?

Cheapflights simply makes it quick and affordable to book flights from Dulles Intl to Ottawa by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Dulles Intl to Ottawa with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Dulles Intl to Ottawa flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Dulles Intl to Ottawa become cheaper?

Yes, Cheapflights offers price alerts on Dulles Intl to Ottawa flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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