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Dulles Intl

$138+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
1 adult, Economy
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Cheap 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 May 4, 2026.

This Super.com deal was found by Cheapflights users on 5/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/201:50 pm
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Wed 6/104:05 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/4$199
This Air Canada deal was found by Cheapflights users on 5/2. 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.
Wed 6/32:55 pm
YTZ
-
IAD
Nonstop1h 17m
Air Canada
Mon 6/85:15 pm
IAD
-
YTZ
Nonstop1h 27m
Air Canada
Deal found 5/2$200
This Ticket deal was found by Cheapflights users on 5/2. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/162:55 pm
YTZ
-
IAD
Nonstop1h 17m
Air Canada
Tue 6/235:15 pm
IAD
-
YTZ
Nonstop1h 27m
Air Canada
Deal found 5/2$201
This Kissandfly.com deal was found by Cheapflights users on 5/3. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:15 am
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Thu 5/284:05 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/3$204
This Justfly.com deal was found by Cheapflights users on 5/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:15 am
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Mon 5/254:05 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/2$205
This FlightHub deal was found by Cheapflights users on 5/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/309:15 am
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Sun 5/314:05 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/2$206
This Cheapflightsfares deal was found by Cheapflights users on 5/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:50 pm
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Tue 6/211:30 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/3$209
This Trip.com deal was found by Cheapflights users on 5/2. 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.
Wed 6/31:50 pm
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Sun 6/74:05 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/2$210
This Trip.com deal was found by Cheapflights users on 5/2. 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.
Mon 6/81:50 pm
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Sun 6/1411:30 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 5/2$211
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/229:15 am
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Sat 6/2711:30 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 4/30$212
This Air Canada deal was found by Cheapflights users on 5/1. 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.
Fri 5/291:55 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Mon 6/13:45 pm
IAD
-
YYZ
1 stop6h 13m
Air Canada
Deal found 5/1$217
This Air Canada deal was found by Cheapflights users on 5/1. 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.
Sat 5/239:00 am
YYZ
-
IAD
1 stop6h 03m
Air Canada
Wed 5/279:45 am
IAD
-
YYZ
1 stop4h 53m
Air Canada
Deal found 5/1$226

Find 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 May 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$199
(Super.com)

One-way from

$139
(Air Canada)

Popular in

March

Cheapest in

October

Average price

$254

Good round-trip deal

$196 or less

Good one-way deal

$151 or less
Provider with most accurate pricing for Toronto (YTO)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-Washington, D.C. (WAS) flights.
Search Deals
From Ontario to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Ontario to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Ontario to Washington, D.C. Dulles Intl.
Search Deals

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 May 4, 2026.
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
Quickest round-trip

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 5/22

1:50 pm-3:21 pm

Nonstop1h 31m

Washington, D.C. Dulles Intl

Mon 5/25

11:30 am-1:00 pm

Nonstop1h 30m

$207

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 6/14

1:50 pm-3:21 pm

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 6/21

4:00 pm-5:30 pm

Nonstop1h 30m

$227

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 6/11

9:15 am-10:46 am

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 6/14

11:30 am-1:00 pm

Nonstop1h 30m

$227

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 6/5

9:15 am-10:46 am

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sat 6/6

11:30 am-1:00 pm

Nonstop1h 30m

$228

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 6/3

10:45 am-3:03 pm

1 stop4h 18m

Washington, D.C. Dulles Intl

Mon 6/8

5:15 pm-6:42 pm

Nonstop1h 27m

$231

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 5/28

2:20 pm-10:56 pm

1 stop8h 36m

Washington, D.C. Dulles Intl

Wed 6/3

6:00 am-1:30 pm

1 stop7h 30m

$242

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sat 6/13

6:03 am-11:48 am

1 stop5h 45m

Washington, D.C. Dulles Intl

Sat 6/20

5:20 pm-11:02 pm

1 stop5h 42m

$242

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 5/21

9:49 am-4:54 pm

1 stop7h 05m

Washington, D.C. Dulles Intl

Sun 5/24

6:00 am-1:30 pm

1 stop7h 30m

$243

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 5/19

6:12 pm-10:56 pm

1 stop4h 44m

Washington, D.C. Dulles Intl

Sun 5/24

6:00 am-1:30 pm

1 stop7h 30m

$243

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Wed 6/3

6:00 am-12:18 pm

1 stop6h 18m

Washington, D.C. Dulles Intl

Mon 6/8

6:05 am-1:34 pm

1 stop7h 29m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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
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

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 43 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 month to book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Currently, July is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of $93). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $168). 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 May 4, 2026.

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 41% 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 May 2, 2026.

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. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from Ontario to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 4, 2026.

The most flights from CAON to IAD are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

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

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, Air Canada, and Delta can get you from Region of Ontario to Washington, D.C. Dulles Intl Airport in just under 1h 31m. Your travel time can differ by up to 7h 05m. 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 $101. Users have also found prices from $117 and $125 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 (87%), Republic Airways (84%), Copa Airlines( 84%).

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

    On average you can expect to pay $303 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 $245.

  • 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, July is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of $93). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $168). 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
Tysons
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Woodbridge
Hanover
Laurel
Largo
Upper Marlboro
Waldorf
Clinton
Hunt Valley
Cordova

Browse thousands of different options on Cheapflights for your next trip

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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 May 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$160Average$351FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$181Average$366FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$189Average$328FlexibilityNo cancel feeOn-time52%

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