Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ottawa to Washington, D.C. Dulles Intl Airport from C$ 257

YOW — IAD
17 Oct — 24 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ottawa to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Dulles Intl

Fri 9/1010:40 a.m. -
1 stop4h 30m
Mon 12/103:50 p.m. -
1 stop4h 12m
Deal found 13/9C$ 438
Thu 15/1010:40 a.m. -
1 stop4h 30m
Thu 22/103:50 p.m. -
1 stop5h 52m
Deal found 15/9C$ 439
Sun 4/1010:40 a.m. -
1 stop4h 30m
Mon 5/103:50 p.m. -
1 stop5h 52m
Deal found 13/9C$ 441
Fri 16/1010:40 a.m. -
1 stop4h 30m
Mon 26/1011:20 a.m. -
1 stop4h 49m
Deal found 13/9C$ 445
Fri 16/1010:40 a.m. -
1 stop4h 30m
Sun 25/1011:20 a.m. -
1 stop4h 49m
Deal found 13/9C$ 446
Sun 1/1112:15 p.m. -
1 stop5h 28m
Sun 8/1111:20 a.m. -
1 stop4h 49m
Deal found 17/9C$ 449
Thu 15/1011:15 a.m. -
1 stop3h 42m
Mon 19/105:20 p.m. -
1 stop4h 32m
Deal found 15/9C$ 452
Thu 1/106:00 a.m. -
Nonstop1h 43m
Sun 4/1010:10 p.m. -
Nonstop1h 44m
Deal found 17/9C$ 453
Thu 15/106:00 a.m. -
Nonstop1h 43m
Mon 19/1010:10 p.m. -
Nonstop1h 44m
Deal found 16/9C$ 455
Thu 1/1010:40 a.m. -
1 stop4h 30m
Mon 5/103:50 p.m. -
1 stop4h 12m
Deal found 13/9C$ 456
Fri 9/1010:40 a.m. -
1 stop4h 30m
Fri 23/103:50 p.m. -
1 stop4h 12m
Deal found 12/9C$ 457
Fri 2/106:00 a.m. -
Nonstop1h 43m
Sun 4/105:20 p.m. -
1 stop4h 32m
Deal found 17/9C$ 460

Find flight deals from Ottawa to Dulles Intl

Round-trip from

C$ 438

One-way from

C$ 257

Popular in

September

Cheapest in

January

Average price

C$ 912

Good round-trip deal

C$ 708 or less

Good one-way deal

C$ 341 or less
Porter Airlines
  • Porter Airlines
  • 9/10-12/10
  • 2 total stops
  • 8h 42m total
  • Ottawa to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 16/10-31/12
  • 1 total stop
  • 4h 30m total
  • Ottawa to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 211 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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

 
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Thu 26/11

9:45 a.m.-11:48 a.m.

Nonstop2h 03m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 264

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Tue 6/10

2:50 p.m.-7:00 p.m.

1 stop4h 10m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 266
Quickest round-trip

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Mon 12/10

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 278

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Wed 2/12

2:00 p.m.-3:53 p.m.

Nonstop1h 53m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 322

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Sat 24/10

7:30 p.m.-9:14 p.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 324

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Fri 23/10

6:00 a.m.-7:43 a.m.

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 324

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Wed 30/12

2:00 p.m.-4:01 p.m.

Nonstop2h 01m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 324

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Sat 17/10

7:30 p.m.-9:14 p.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 332

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Sat 17/10

7:30 p.m.-9:14 p.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Fri 23/10

5:20 p.m.-9:52 p.m.

1 stop4h 32m

C$ 462

OttawaWashington, D.C.

YOW Ottawa - IAD Washington, D.C. Dulles Intl

YOWIAD

Ottawa

Sat 17/10

7:30 p.m.-9:14 p.m.

Nonstop1h 44m

Washington, D.C. Dulles Intl

Fri 23/10

6:10 a.m.-9:35 p.m.

1 stop15h 25m

C$ 467

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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, January is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of C$ 427). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of C$ 912). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to Washington, D.C. Dulles Intl Airport as you normally would.

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

Airfare is below average for this route at the moment.

Ottawa to Washington, D.C. Dulles Intl Airport flights typically cost between C$ 579 and C$ 1,311 in October.
The cheapest round-trip price found within the last 5 days was C$ 438 on Porter Airlines (9 Oct-12 Oct).

Reviews of airlines servicing Dulles Intl

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
462 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Porter Airlines
8.0
Very good
462 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
United Airlines
7.4
Good
10,217 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Canada
7.1
Good
11,645 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Food

7.6

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Related info for your journey

  • 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 44m. There are 723 km between Ottawa and Washington, D.C. Dulles Intl Airport. Generally, flights for this route are direct.

  • 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$ 319), United Airlines (C$ 362), and Air Canada (C$ 490) offers the cheapest pricing from Ottawa to Washington, D.C. Dulles Intl Airport. These flights start at 45% 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: Avianca (92%), Republic Airways (89%), Air Canada (80%).

  • 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$ 272. While the most popular route (Ottawa - Washington, D.C. Dulles Intl) can be booked for C$ 455 on average, our data indicates C$ 1,977 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, January is the cheapest month in which you can book a flight from Ottawa to Washington, D.C. Dulles Intl Airport (average of C$ 427). Flying from Ottawa to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of C$ 912). 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
Silver Spring
Winchester
Alexandria
Hanover
Oxon Hill
Gaithersburg
Reston
Chantilly
Herndon
Ellicott City
Arlington
Fredericksburg
Ashburn
Rockville

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ottawa to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 319AverageC$ 432FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 362AverageC$ 575FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 490AverageC$ 659FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.