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Cheap flights from Ottawa to Washington, D.C. Dulles Intl Airport from C$ 207

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 13/12. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — IAD
13 Dec — 20 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ottawa to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Dulles Intl
Explore the most affordable flight options available from Ottawa to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 November 2025.

Sat 13/128:40 a.m.YOW - IAD
1 stop3h 49mPorter Airlines
Sat 20/1211:40 a.m.IAD - YOW
1 stop5h 49mPorter Airlines
Deal found 11/11C$ 384
Fri 26/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Thu 1/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 10/11C$ 392
Tue 9/1212:10 p.m.YOW - IAD
1 stop5h 04mPorter Airlines
Tue 16/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/11C$ 395
Fri 19/1212:10 p.m.YOW - IAD
1 stop5h 04mPorter Airlines
Sat 3/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 12/11C$ 405
Thu 11/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Thu 11/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 13/11C$ 406
Wed 24/127:27 p.m.YOW - IAD
Nonstop1h 58mUnited Airlines
Wed 31/128:20 a.m.IAD - YOW
1 stop5h 12mUnited Airlines
Deal found 13/11C$ 416
Sat 13/128:40 a.m.YOW - IAD
1 stop3h 49mPorter Airlines
Sat 3/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/11C$ 417
Fri 26/128:40 a.m.YOW - IAD
1 stop8h 34mPorter Airlines
Fri 2/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 11/11C$ 422
Tue 23/125:59 p.m.YOW - IAD
1 stop5h 07mUnited Airlines
Sun 4/110:08 p.m.IAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 13/11C$ 424
Wed 10/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Thu 11/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 12/11C$ 426
Tue 23/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Sun 4/111:40 a.m.IAD - YOW
1 stop3h 24mPorter Airlines
Deal found 12/11C$ 429

Cheap flight deals from Ottawa to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Dulles Intl (IAD). 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 13 November 2025.

Round-trip from

C$ 384

One-way from

C$ 207

Popular in

August

Cheapest in

April

Average price

C$ 628

Good round-trip deal

C$ 604 or less

Good one-way deal

C$ 303 or less
Porter Airlines
  • Porter Airlines
  • 13/12-20/12
  • 2 total stops
  • 9h 38m total
  • Ottawa to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 13/12
  • 1 total stop
  • 3h 49m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Ottawa to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Ottawa to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Dulles Intl 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 13 November 2025.
Use the filters below to find and compare flights from Ottawa to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Ottawa

Fly to

Dulles Intl

Route

Depart

Return

Price

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 19/12

6:50 a.m.-10:24 a.m.

1 stop3h 34m

Washington, D.C. Dulles Intl

Sat 3/1

11:40 a.m.-3:04 p.m.

1 stop3h 24m

C$ 405

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 26/12

8:40 a.m.-5:14 p.m.

1 stop8h 34m

Washington, D.C. Dulles Intl

Fri 2/1

6:30 p.m.-10:29 p.m.

1 stop3h 59m

C$ 422

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 10/12

6:50 a.m.-10:24 a.m.

1 stop3h 34m

Washington, D.C. Dulles Intl

Thu 11/12

6:30 p.m.-10:29 p.m.

1 stop3h 59m

C$ 426

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 23/12

6:50 a.m.-10:24 a.m.

1 stop3h 34m

Washington, D.C. Dulles Intl

Sun 4/1

11:40 a.m.-3:04 p.m.

1 stop3h 24m

C$ 429

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 25/12

2:15 p.m.-4:13 p.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Sun 28/12

10:08 p.m.-11:54 p.m.

Nonstop1h 46m

C$ 433

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 22/12

7:27 p.m.-9:25 p.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Mon 29/12

10:08 p.m.-11:54 p.m.

Nonstop1h 46m

C$ 434

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 9/12

4:15 p.m.-2:29 p.m.

2 stops22h 14m

Washington, D.C. Dulles Intl

Tue 16/12

6:30 p.m.-10:29 p.m.

1 stop3h 59m

C$ 457

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 17/12

6:50 a.m.-10:24 a.m.

1 stop3h 34m

C$ 207

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Tue 16/12

12:10 p.m.-5:14 p.m.

1 stop5h 04m

C$ 207

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 13/12

8:40 a.m.-12:29 p.m.

1 stop3h 49m

C$ 207

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/11

Showing 1-10 of 16 results
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Best time to book a flight from Ottawa to Dulles Intl

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

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

Currently, March is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of C$ 221). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 388). 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 YOW to IAD?

Find hourly flight availability from Ottawa to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 November 2025.

A simple way to save on the total cost of your ticket is to fly from Ottawa to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 60% on your trip compared to booking a flight at noon.

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

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated 13 November 2025.
See what other customers who have flown with Porter Airlines,United Airlines, andAir Canada from Ottawa to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
389 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Overall

8.0

Food

7.6

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
Porter Airlines
8.0
Very good
389 reviews
Porter Airlines
8.0
Very good
389 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Overall

8.0

Food

7.6

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
United Airlines
7.4
Good
9,015 reviews
Porter Airlines
8.0
Very good
389 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Overall

8.0

Food

7.6

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
Air Canada
7.1
Good
10,444 reviews
Porter Airlines
8.0
Very good
389 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Overall

8.0

Food

7.6

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Dulles Intl. 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 from for flights from Ottawa to Washington, D.C. Dulles Intl?

    Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Ottawa; the airport handles an average of 6 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Ottawa airport to Washington, D.C. Dulles Intl. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

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

    Departing from Ottawa to Washington, D.C. Dulles Intl Airport will take you 3h 34m. There are 723 km between Ottawa and Washington, D.C. Dulles Intl Airport.

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

    According to our current data, Porter Airlines (C$ 358), Air Canada (C$ 371), and United Airlines (C$ 458) offers the cheapest pricing from Ottawa to Washington, D.C. Dulles Intl Airport. These flights start at 37% lower than the current average price 3 months from now.

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

    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 Ottawa to Washington, D.C. Dulles Intl Airport on time: GoJet (78%), Air Canada (77%), United Airlines (73%).

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

    Looking at all options, your cheapest flight can be booked for C$ 244. While the most popular route (Ottawa - Washington, D.C. Dulles Intl) can be booked for C$ 382 on average, our data indicates C$ 948 when flying from Ottawa to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of C$ 221). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 388). 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
Warrenton
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Herndon
Arlington
Winchester
Manassas
Fredericksburg
Alexandria
Rockville

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Top 3 airlines flying from Ottawa to Dulles Intl

Discover the top 3 airlines that operate flights from Ottawa to Dulles Intl. 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 13 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 358AverageC$ 431FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 371AverageC$ 588FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 458AverageC$ 690FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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

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Cheapflights helps you find that perfect flight to Dulles Intl from Ottawa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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Yes! Start tracking prices for Ottawa to Dulles Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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