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Cheap flights from Ontario to Washington, D.C. Dulles Intl Airport from C$ 166

YYZ — IAD
21 Oct — 28 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Dulles Intl

Fri 23/101:40 p.m. -
Nonstop1h 30m
Sun 25/1011:20 a.m. -
Nonstop1h 32m
Deal found 17/9C$ 250
Sat 3/109:15 a.m. -
Nonstop1h 30m
Sun 4/1011:25 a.m. -
Nonstop1h 30m
Deal found 19/9C$ 252
Thu 1/109:15 a.m. -
Nonstop1h 30m
Mon 5/1011:25 a.m. -
Nonstop1h 30m
Deal found 16/9C$ 253
Thu 1/101:40 p.m. -
Nonstop1h 30m
Sun 4/103:50 p.m. -
Nonstop1h 30m
Deal found 17/9C$ 254
Thu 15/109:30 a.m. -
1 stop5h 27m
Sun 18/109:45 a.m. -
1 stop4h 35m
Deal found 20/9C$ 256
Thu 15/109:15 a.m. -
Nonstop1h 30m
Sun 18/103:50 p.m. -
Nonstop1h 30m
Deal found 20/9C$ 257
Thu 1/108:30 a.m. -
1 stop6h 30m
Mon 5/103:45 p.m. -
1 stop5h 45m
Deal found 16/9C$ 261
Thu 8/101:40 p.m. -
Nonstop1h 30m
Thu 15/1011:25 a.m. -
Nonstop1h 30m
Deal found 19/9C$ 263
Thu 22/101:55 p.m. -
Nonstop1h 30m
Wed 28/109:55 a.m. -
Nonstop1h 27m
Deal found 20/9C$ 263
Thu 1/109:15 a.m. -
Nonstop1h 30m
Thu 1/103:50 p.m. -
Nonstop1h 30m
Deal found 17/9C$ 264
Wed 7/101:55 p.m. -
Nonstop1h 30m
Sun 11/109:55 a.m. -
Nonstop1h 25m
Deal found 18/9C$ 266
Thu 5/116:40 p.m. -
Nonstop1h 30m
Thu 12/119:55 a.m. -
1 stop4h 50m
Deal found 21/9C$ 267

Find flight deals from Ontario to Dulles Intl

Round-trip from

C$ 250

One-way from

C$ 166

Popular in

March

Cheapest in

November

Average price

C$ 366

Good round-trip deal

C$ 291 or less

Good one-way deal

C$ 164 or less
Porter Airlines
  • Porter Airlines
  • 23/10-25/10
  • Nonstop
  • 3h 02m total
  • Ontario to Washington, D.C.
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Porter Airlines
  • Porter Airlines
  • 22/11-31/12
  • Nonstop
  • 1h 28m total
  • Ontario to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 55 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ontario to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Ontario to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 19/11

2:45 p.m.-4:24 p.m.

Nonstop1h 39m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 175

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Tue 6/10

9:44 a.m.-11:21 a.m.

Nonstop1h 37m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 175

TorontoWashington, D.C.

YTZ Toronto Island - IAD Washington, D.C. Dulles Intl

YTZIAD

Toronto Island

Thu 15/10

9:15 a.m.-10:45 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 178

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Sun 4/10

10:15 a.m.-12:50 a.m.

1 stop14h 35m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 201

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 29/10

10:53 a.m.-12:30 a.m.

1 stop13h 37m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 201

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 8/10

2:26 p.m.-11:16 p.m.

1 stop8h 50m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 203

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Wed 14/10

10:15 a.m.-4:01 p.m.

1 stop5h 46m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 203

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Wed 4/11

7:26 p.m.-12:30 a.m.

1 stop5h 04m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 203

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Fri 2/10

2:45 p.m.-10:52 p.m.

1 stop8h 07m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 203

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Tue 13/10

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

1 stop12h 19m

Washington, D.C. Dulles Intl

Wed 31/12

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

Nonstop0h 00m

C$ 203

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/9

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington, D.C. Dulles Intl Airport

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

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of C$ 376). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 460). 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 ON to IAD?

Unlike at noon, when flights are generally more expensive, you can save up to 32% on flights from Region of Ontario to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Region of Ontario to Washington, D.C. Dulles Intl Airport

The most flights from CAON to IAD are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

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

Airfare is below average for this route at the moment.
Region of Ontario to Washington, D.C. Dulles Intl Airport flights typically cost between C$ 375 and C$ 633 in October.
The cheapest round-trip price found within the last 5 days was C$ 263 on Air Canada (22 Oct-28 Oct).

How far ahead should I book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from Region of Ontario to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Region of Ontario to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

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

    Departing from Region of Ontario to Washington, D.C. Dulles Intl Airport will take you 1h 27m. There are 546 km between Region of Ontario and Washington, D.C. Dulles Intl Airport. Most flights are nonstop.

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

    One-way options have recently been found by users for as low as C$ 156 on Porter Airlines. Other airlines that offer cheap prices include United Airlines from C$ 193 and Air Canada from C$ 194 one-way.

  • What are the most popular routes from Region of Ontario to Washington, D.C. Dulles Intl Airport?

    When deciding which route to take from Region of Ontario to Washington, D.C. Dulles Intl Airport consider Toronto Pearson Intl - Washington, D.C. Dulles Intl, Toronto Island - Washington, D.C. Dulles Intl or Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl as they are the most popular.

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

    The top 3 most reliable airlines when flying from Region of Ontario to Washington, D.C. Dulles Intl Airport are ANA (84%), Copa Airlines (82%) and Republic Airways (82%).

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

    The cheapest flight price from Region of Ontario to Washington, D.C. Dulles Intl Airport is C$ 243. On average you can expect to pay C$ 2,510. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 274.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of C$ 376). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 460). 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
Chantilly
Reston
Herndon
Ellicott City
Arlington
Fredericksburg
Ashburn
Rockville

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Dulles Intl

Pearson Intl to Dulles Intl flights
Pearson Intl to Reagan-National flights
Toronto Island to Dulles Intl flights
Pearson Intl to Baltimore flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Vancouver Intl to Reagan-National flights
Vancouver Intl to Dulles Intl flights
Ottawa to Dulles Intl flights
Toronto Island to Reagan-National flights
Ottawa to Reagan-National flights
Pierre Elliott Trudeau Intl to Baltimore flights
Vancouver Intl to Baltimore flights
Calgary to Dulles Intl flights
Calgary to Reagan-National flights
Ottawa to Baltimore flights
Toronto Island to Baltimore flights
Calgary to Baltimore flights
Winnipeg to Dulles Intl flights
Winnipeg to Reagan-National flights
Winnipeg to Baltimore flights
Halifax to Dulles Intl flights
Edmonton to Dulles Intl flights
Edmonton to Baltimore flights
Halifax to Reagan-National flights
Edmonton to Reagan-National flights
Saskatoon to Baltimore flights
Halifax to Baltimore flights
Saskatoon to Reagan-National flights
Québec City to Reagan-National flights
Québec City to Dulles Intl flights
Victoria to Dulles Intl flights
Québec City to Baltimore flights
Victoria to Reagan-National flights
Kelowna to Dulles Intl flights
Kamloops to Dulles Intl flights
St. John's to Dulles Intl flights
London to Dulles Intl flights
Hamilton to Reagan-National flights
Regina to Reagan-National flights
London to Baltimore flights
Regina to Baltimore flights
London to Reagan-National flights
Kamloops to Baltimore flights
Kelowna to Reagan-National flights
Thunder Bay to Dulles Intl flights
St. John's to Reagan-National flights
Fredericton to Dulles Intl flights

Top 4 airlines flying from Ontario to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 113AverageC$ 500FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 234AverageC$ 350FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 304AverageC$ 604FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 326AverageC$ 507FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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

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

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Ontario today and book when prices fit your budget.

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