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Cheap flights from Ottawa to Washington, D.C. Dulles Intl Airport from C$ 189

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 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — IAD
20 Dec — 27 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 20 November 2025.

Wed 24/127:27 p.m.YOW - IAD
Nonstop1h 58mUnited Airlines
Sat 3/110:08 p.m.IAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 17/11C$ 407
Fri 19/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Sun 28/126:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 20/11C$ 409
Wed 24/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Sun 28/1211:40 a.m.IAD - YOW
1 stop3h 24mPorter Airlines
Deal found 18/11C$ 412
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 19/11C$ 415
Mon 22/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Sat 3/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 18/11C$ 416
Sat 13/122:17 p.m.YOW - IAD
Nonstop1h 54mUnited Airlines
Sun 14/128:45 a.m.IAD - YOW
1 stop4h 51mUnited Airlines
Deal found 20/11C$ 418
Wed 31/126:50 a.m.YOW - IAD
1 stop3h 34mPorter Airlines
Fri 2/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 18/11C$ 425
Mon 22/125:59 p.m.YOW - IAD
1 stop5h 07mUnited Airlines
Mon 29/1210:08 p.m.IAD - YOW
Nonstop1h 46mUnited Airlines
Deal found 18/11C$ 426
Mon 22/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Thu 1/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 18/11C$ 429
Sun 21/121:20 p.m.YOW - IAD
1 stop3h 54mPorter Airlines
Fri 2/16:30 p.m.IAD - YOW
1 stop3h 59mPorter Airlines
Deal found 18/11C$ 433
Wed 24/122:15 p.m.YOW - IAD
Nonstop1h 58mUnited Airlines
Thu 1/18:20 a.m.IAD - YOW
1 stop5h 12mUnited Airlines
Deal found 18/11C$ 435

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 20 November 2025.

Round-trip from

C$ 407

One-way from

C$ 189

Popular in

August

Cheapest in

April

Average price

C$ 630

Good round-trip deal

C$ 606 or less

Good one-way deal

C$ 305 or less
United Airlines
  • United Airlines
  • 24/12-3/1
  • Nonstop
  • 3h 44m total
  • Ottawa to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 18/12
  • 1 total stop
  • 3h 34m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 24 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.
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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 20 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

Wed 24/12

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

Nonstop1h 58m

Washington, D.C. Dulles Intl

Sat 3/1

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

Nonstop1h 46m

C$ 407

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Fri 26/12

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

1 stop3h 34m

Washington, D.C. Dulles Intl

Sat 27/12

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

1 stop3h 59m

C$ 409

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 26/1

7:00 a.m.-10:19 a.m.

1 stop3h 19m

Washington, D.C. Dulles Intl

Fri 6/2

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

1 stop3h 24m

C$ 416

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 13/12

2:17 p.m.-4:11 p.m.

Nonstop1h 54m

Washington, D.C. Dulles Intl

Sun 14/12

8:45 a.m.-1:36 p.m.

1 stop4h 51m

C$ 418

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 31/12

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

1 stop3h 34m

Washington, D.C. Dulles Intl

Fri 2/1

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

1 stop3h 59m

C$ 425

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Mon 22/12

5:59 p.m.-11:06 p.m.

1 stop5h 07m

Washington, D.C. Dulles Intl

Mon 29/12

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

Nonstop1h 46m

C$ 426

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Thu 25/12

9:45 a.m.-11:47 a.m.

Nonstop2h 02m

Washington, D.C. Dulles Intl

Tue 30/12

5:10 p.m.-6:52 p.m.

Nonstop1h 42m

C$ 435

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Wed 24/12

9:45 a.m.-11:47 a.m.

Nonstop2h 02m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop1h 46m

C$ 435

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 21/12

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

Nonstop1h 58m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop1h 46m

C$ 435

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 21/12

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

Nonstop1h 58m

Washington, D.C. Dulles Intl

Tue 30/12

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

Nonstop1h 46m

C$ 435

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/11

Showing 1-10 of 19 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$ 222). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of C$ 380). 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 20 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.

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 20 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
393 reviews
Check prices

Food

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
393 reviews
Porter Airlines
8.0
Very good
393 reviews
Check prices

Food

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,027 reviews
Porter Airlines
8.0
Very good
393 reviews
Check prices

Food

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,462 reviews
Porter Airlines
8.0
Very good
393 reviews
Check prices

Food

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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 1h 58m. There are 723 km between Ottawa and Washington, D.C. Dulles Intl Airport. Both multi-stop and direct flights can be found to your destination and back.

  • 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$ 359), Air Canada (C$ 373), and United Airlines (C$ 459) offers the cheapest pricing from Ottawa to Washington, D.C. Dulles Intl Airport. These flights start at 36% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as C$ 189 on Porter Airlines. Other airlines that offer cheap prices include Air Canada from C$ 231 and United Airlines from C$ 252 one-way.

  • 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: Avianca (82%), Republic Airways (76%), United Airlines (75%).

  • 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$ 245. While the most popular route (Ottawa - Washington, D.C. Dulles Intl) can be booked for C$ 332 on average, our data indicates C$ 952 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$ 222). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of C$ 380). 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

Browse thousands of different options on Cheapflights for your next trip

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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 20 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 359AverageC$ 432FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 373AverageC$ 591FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 459AverageC$ 693FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Ottawa to Dulles Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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!

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

Yes! Cheapflights helps users easily find flights from Ottawa to Dulles Intl with no change fees.

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

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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