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Dulles Intl

$133+ Cheap flights from Ontario to Dulles Intl (IAD)

YYZ — IAD
Dec 11 — Dec 181
Fri 12/11
Fri 12/18
1 adult, Economy
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Cheap flight deals from Ontario to Dulles Intl

Cheapest flights from Ontario to Dulles Intl

Thu 12/109:10 am -
Nonstop1h 30m
Thu 12/1711:20 am -
Nonstop1h 30m
Deal found 11/10$199
Thu 12/39:10 am -
Nonstop1h 30m
Tue 12/811:20 am -
Nonstop1h 30m
Deal found 11/9$200
Tue 11/249:10 am -
Nonstop1h 29m
Mon 11/306:25 pm -
Nonstop1h 30m
Deal found 11/9$201
Tue 12/229:10 am -
Nonstop1h 30m
Tue 1/511:20 am -
Nonstop1h 32m
Deal found 11/10$202
Tue 12/159:10 am -
Nonstop1h 30m
Wed 12/1611:20 am -
Nonstop1h 30m
Deal found 11/9$209
Sat 12/129:10 am -
Nonstop1h 30m
Mon 12/1411:20 am -
Nonstop1h 30m
Deal found 11/10$211
Thu 12/179:10 am -
Nonstop1h 30m
Mon 1/411:20 am -
Nonstop1h 32m
Deal found 11/9$212
Sat 12/59:10 am -
Nonstop1h 30m
Sun 12/611:20 am -
Nonstop1h 30m
Deal found 11/9$213
Sat 12/56:40 pm -
Nonstop1h 30m
Sun 12/69:55 am -
Nonstop1h 27m
Deal found 11/9$215
Thu 12/179:10 am -
Nonstop1h 30m
Sat 1/911:20 am -
Nonstop1h 32m
Deal found 11/9$216
Fri 12/44:15 pm -
Nonstop1h 30m
Mon 12/711:20 am -
Nonstop1h 30m
Deal found 11/10$217
Thu 12/39:10 am -
Nonstop1h 30m
Sun 12/611:20 am -
Nonstop1h 30m
Deal found 11/9$218

Find flight deals from Ontario to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$199
(Justfly.com)

One-way from

$133
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$227

Good round-trip deal

$227 or less

Good one-way deal

$119 or less
Provider with most accurate pricing for Toronto (YTO)-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-Washington, D.C. (WAS) flights.
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From Ontario to Washington, D.C. Dulles Intl
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One-way flight from Ontario to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 8% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in November 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

Mon 1/11

12:10 pm-4:45 pm

1 stop4h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$163

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Mon 12/7

12:18 pm-5:33 pm

1 stop5h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$166

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Thu 11/26

12:15 pm-7:16 pm

1 stop7h 01m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$166

TorontoWashington, D.C.

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

YTZIAD

Toronto Island

Tue 12/22

9:10 am-10:40 am

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$169

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Thu 12/17

2:25 pm-11:23 pm

1 stop8h 58m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$175

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Sun 1/10

5:15 pm-11:17 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$181

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Thu 1/7

6:10 am-11:59 am

1 stop5h 49m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$181

TorontoWashington, D.C.

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

YTZIAD

Toronto Island

Sun 11/22

9:10 am-10:39 am

Nonstop1h 29m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$194

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Sun 11/22

6:00 am-10:57 am

1 stop4h 57m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$200

TorontoWashington, D.C.

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

YTZIAD

Toronto Island

Mon 12/21

9:10 am-10:40 am

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

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, April is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of $271). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $327). 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?

One of the essential ways to save on airfare from Region of Ontario to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 39% on airfare.

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 Monday (15 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (12 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 $239 and $428 in December.
The cheapest round-trip price found within the last 5 days was $215 on Air Canada (Dec 5-Dec 6).

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

The best time to book flights from Region of Ontario to Washington, D.C. Dulles Intl Airport is 34 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 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 Sunday evenings when fares are most often at their lowest. Sunday afternoons 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?

    Porter Airlines, United Airlines, and Delta can get you from Region of Ontario to Washington, D.C. Dulles Intl Airport in just under 1h 30m. Your travel time can differ by up to 2h 38m. The distance between Region of Ontario and Washington, D.C. Dulles Intl Airport is about 339 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as $111. Users have also found prices from $119 and $135 on Air Canada and United Airlines, respectively.

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

    Most travelers choose 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 when deciding on the best route from Region of Ontario to Washington, D.C. Dulles Intl Airport.

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

    Before booking your flight to Washington, D.C. Dulles Intl Airport from Region of Ontario, check out the most reliable airlines to get you to your destination on time: ANA (100%), Republic Airways (92%), Copa Airlines( 88%).

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

    On average you can expect to pay $691 for a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $137 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at $222.

  • 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, April is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of $271). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $327). 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

Traveling 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
Alexandria
Chantilly
Woodbridge
Arlington
Sterling
Lanham
Reston
Herndon
Hyattsville
Springfield
Fairfax
Fredericksburg
Falls Church
Rockville
Towson
Silver Spring
Oxon Hill
Laurel
Hunt Valley
Clinton

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ontario to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$159Average$351FlexibilityNo cancel feeOn-time69%
Porter AirlinesCheapest$177Average$260FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$187Average$395FlexibilityNo cancel feeOn-time67%

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