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Dulles Intl

$119+ Cheap flights from Ontario to Dulles Intl (IAD)

YYZ — IAD
Oct 22 — Oct 291
Thu 10/22
Thu 10/29
1 adult, Economy
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Cheap flight deals from Ontario to Dulles Intl

Cheapest flights from Ontario to Dulles Intl

Thu 10/159:15 am -
Nonstop1h 30m
Sun 10/183:50 pm -
Nonstop1h 30m
Deal found 9/17$179
Sat 10/39:15 am -
Nonstop1h 30m
Sun 10/411:25 am -
Nonstop1h 30m
Deal found 9/19$180
Wed 10/78:30 am -
1 stop6h 27m
Sun 10/115:20 pm -
Nonstop1h 37m
Deal found 9/18$181
Thu 10/11:40 pm -
Nonstop1h 30m
Sun 10/43:50 pm -
Nonstop1h 30m
Deal found 9/17$182
Thu 10/159:30 am -
1 stop5h 27m
Sun 10/189:45 am -
1 stop4h 35m
Deal found 9/20$183
Fri 12/189:10 am -
Nonstop1h 28m
Sun 12/2011:20 am -
Nonstop1h 32m
Deal found 9/20$187
Thu 10/151:40 pm -
Nonstop1h 30m
Wed 11/1111:20 am -
Nonstop1h 32m
Deal found 9/19$188
Thu 10/221:55 pm -
Nonstop1h 30m
Wed 10/289:55 am -
Nonstop1h 27m
Deal found 9/20$188
Fri 10/239:15 am -
Nonstop1h 30m
Wed 10/2811:20 am -
Nonstop1h 32m
Deal found 9/17$189
Fri 10/169:15 am -
Nonstop1h 30m
Mon 10/1911:25 am -
Nonstop1h 30m
Deal found 9/19$190
Wed 10/71:55 pm -
Nonstop1h 30m
Sun 10/119:55 am -
Nonstop1h 25m
Deal found 9/18$190
Wed 10/1412:45 pm -
Nonstop1h 37m
Wed 10/2110:19 pm -
Nonstop1h 35m
Deal found 9/21$196

Find flight deals from Ontario to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$179
(Cheapflightsfares)

One-way from

$119
(Cheapflightsfares)

Popular in

March

Cheapest in

November

Average price

$262

Good round-trip deal

$173 or less

Good one-way deal

$126 or less
Provider with most accurate pricing for Toronto (YTO)-Washington, D.C. (WAS) flight deals.
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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. 9% potential increase in price ($28 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 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 10/22

12:45 pm-2:22 pm

Nonstop1h 37m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$125

TorontoWashington, D.C.

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

YTZIAD

Toronto Island

Fri 10/30

9:10 am-10:38 am

Nonstop1h 28m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$127

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Tue 11/3

7:44 pm-9:26 pm

Nonstop1h 42m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$139

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Fri 10/16

9:44 am-11:21 am

Nonstop1h 37m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$139

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Thu 10/15

12:45 pm-2:22 pm

Nonstop1h 37m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$139

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Tue 10/6

11:00 am-4:01 pm

1 stop5h 01m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$140

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Wed 11/18

9:44 am-4:35 pm

1 stop6h 51m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$140

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Thu 10/29

10:53 am-12:30 am

1 stop13h 37m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$144

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Sun 10/4

10:15 am-12:50 am

1 stop14h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$144

TorontoWashington, D.C.

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

YYZIAD

Toronto Pearson Intl

Wed 11/4

7:26 pm-12:30 am

1 stop5h 04m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/18

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 $269). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $329). 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 44% 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 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 $268 and $452 in October.
The cheapest round-trip price found within the last 5 days was $188 on Air Canada (Oct 22-Oct 28).

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 and United Airlines can get you from Region of Ontario to Washington, D.C. Dulles Intl Airport in just under 1h 28m. Your travel time will be generally consistent. The distance between Region of Ontario and Washington, D.C. Dulles Intl Airport is about 339 mi. Most flights are nonstop.

  • 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 $120 and $134 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 (84%), Copa Airlines (82%), Republic Airways( 82%).

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

    On average you can expect to pay $1,528 for a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $129 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at $196.

  • 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 $269). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $329). 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
Arlington
Owings Mills
Lanham
Tysons
Chantilly
Woodbridge
Reston
Herndon
Hyattsville
Rockville
Fredericksburg
Falls Church
Sterling
Hanover
Laurel
Springfield
Oxon Hill
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ontario to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$160Average$381FlexibilityNo cancel feeOn-time69%
Porter AirlinesCheapest$177Average$246FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$202Average$390FlexibilityNo cancel feeOn-time67%

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