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Dulles Intl

$126+ Cheap flights from Ontario to Dulles Intl (IAD)

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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Ontario to Dulles Intl

Keep the following information in mind while searching for Ontario to Dulles Intl flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$188
(SmartFares)

One-way from

$126
(SmartFares)

Popular in

June

Cheapest in

April

Average price

$244

Good round-trip deal

$196 or less

Good one-way deal

$148 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. 7% potential increase in price ($18 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 October 2025
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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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Find flight deals from Ontario to Dulles Intl

Cheapest flights from Ontario to Dulles Intl
Explore the most affordable flight options available from Ontario to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This SmartFares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:45 pmYTZ - IAD
Nonstop1h 29mPorter Airlines
Mon 12/811:40 amIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/29$188
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/283:45 pmYTZ - IAD
Nonstop1h 29mPorter Airlines
Fri 12/56:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/29$189
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:55 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Sun 11/236:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/28$190
This SmartFares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2211:00 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Tue 12/26:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/29$191
This SmartFares deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2211:00 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Tue 11/256:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/28$192
This Trip.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/213:45 pmYTZ - IAD
Nonstop1h 29mPorter Airlines
Sun 11/236:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/29$194
This SmartFares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:55 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Wed 12/36:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/29$207
This Trip.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2211:00 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Sat 11/291:45 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/27$208
This Trip.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:55 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Fri 11/216:30 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 10/28$209
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/227:40 pmYYZ - IAD
Nonstop1h 40mUnited Airlines
Tue 12/212:35 pmIAD - YYZ
Nonstop1h 39mUnited Airlines
Deal found 10/28$217
This Air Canada deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:55 pmYYZ - IAD
Nonstop1h 31mAir Canada
Sun 12/79:00 amIAD - YYZ
Nonstop1h 29mAir Canada
Deal found 10/29$219
This United deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2210:00 amYYZ - IAD
Nonstop1h 45mMultiple Airlines
Tue 12/29:45 amIAD - YYZ
1 stop6h 55mMultiple Airlines
Deal found 10/28$222

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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 2,558,603 searches. Data last updated October 30, 2025.
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

Ontario

Fly to

Dulles Intl

Route

Depart

Return

Price

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 11/22

11:00 am-12:29 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 pm-8:00 pm

Nonstop1h 30m

$190

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 11/20

8:55 am-10:24 am

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 11/24

11:40 am-1:10 pm

Nonstop1h 30m

$193

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 11/21

8:55 am-10:24 am

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 11/24

11:40 am-1:10 pm

Nonstop1h 30m

$194

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 11/13

8:55 am-10:24 am

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sun 11/16

6:30 pm-8:00 pm

Nonstop1h 30m

$217

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 1/16

2:45 pm-4:30 pm

Nonstop1h 45m

Washington, D.C. Dulles Intl

Mon 1/19

9:45 am-4:40 pm

1 stop6h 55m

$222

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sat 11/22

10:00 am-11:45 am

Nonstop1h 45m

Washington, D.C. Dulles Intl

Tue 12/2

9:45 am-4:40 pm

1 stop6h 55m

$222

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 11/14

3:45 pm-5:14 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 11/17

6:30 pm-8:00 pm

Nonstop1h 30m

$222

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 11/14

3:45 pm-5:14 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sat 11/15

1:45 pm-3:15 pm

Nonstop1h 30m

$222

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 1/16

2:45 pm-4:30 pm

Nonstop1h 45m

Washington, D.C. Dulles Intl

Tue 1/20

8:29 am-1:43 pm

1 stop5h 14m

$227

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 11/18

3:45 pm-5:14 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Tue 11/25

6:30 pm-8:00 pm

Nonstop1h 30m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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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
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 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 $132). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $187). 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?

Find hourly flight availability from Ontario 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 October 30, 2025.

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 17% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Dulles Intl. Price data was last updated on December 16, 2024.

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

Related info for your journey

Find useful and relevant information for your journey from Ontario to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 29m. 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 Air Transat. According to our data, you can fly for as low as $126. Users have also found prices from $128 and $134 on Porter Airlines 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: Avianca (95%), Republic Airways (95%), Copa Airlines( 92%).

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

    On average you can expect to pay $463 for a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $142 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at $217.

  • 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 $132). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $187). 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
Woodbridge
Tysons
Arlington
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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Alternative routes for Ontario to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Reagan-National flights
Pearson Intl to Dulles Intl flights
Toronto Island to Dulles Intl flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Pearson Intl to Baltimore flights
Vancouver Intl to Dulles Intl flights
Vancouver Intl to Baltimore flights
Vancouver Intl to Reagan-National flights
Ottawa to Dulles Intl flights
Ottawa to Reagan-National flights
Toronto Island to Baltimore flights
Pierre Elliott Trudeau Intl to Baltimore flights
Ottawa to Baltimore flights
Calgary to Dulles Intl flights
Calgary to Reagan-National flights
Toronto Island to Reagan-National flights
Calgary to Baltimore flights
Winnipeg to Dulles Intl flights
Winnipeg to Reagan-National flights
Winnipeg to Baltimore flights
Edmonton to Dulles Intl flights
Edmonton to Baltimore flights
Edmonton to Reagan-National flights
Halifax to Baltimore flights
Halifax to Reagan-National flights
Halifax to Dulles Intl flights
Québec City to Dulles Intl flights
Victoria to Dulles Intl flights
Québec City to Baltimore flights
Québec City to Reagan-National flights
Victoria to Baltimore flights
Regina to Baltimore flights
Kelowna to Baltimore flights
Victoria to Reagan-National flights
Whitehorse to Dulles Intl flights
London to Reagan-National flights
London to Baltimore flights
Saskatoon to Reagan-National flights
London to Dulles Intl flights
Saskatoon to Baltimore flights
Kamloops to Baltimore flights
Kelowna to Dulles Intl flights
Kelowna to Reagan-National flights
St. John's to Dulles Intl flights
Moncton to Dulles Intl flights
Deer Lake to Baltimore flights
St. John's to Baltimore flights
St. John's to Reagan-National flights

Top 3 airlines flying from Ontario to Dulles Intl

Discover the top 3 airlines that operate flights from Ontario 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 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$171Average$381FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$174Average$321FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$184Average$376FlexibilityNo cancel feeOn-time69%

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