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Cheap flights from Ontario to Washington, D.C. Dulles Intl Airport from C$ 157

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
17 Jun — 24 Jun1
1 adult

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 12 June 2025.

Round-trip from

C$ 239

One-way from

C$ 157

Popular in

June

Cheapest in

April

Average price

C$ 416

Good round-trip deal

C$ 246 or less

Good one-way deal

C$ 143 or less
Porter Airlines
  • Porter Airlines
  • 10/8-14/8
  • Nonstop
  • 3h 04m total
  • Ontario to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 12/7
  • Nonstop
  • 1h 27m total
  • Ontario to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
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 12 June 2025.

Sat 12/71:25 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sat 19/74:10 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 11/6C$ 241
Tue 7/109:00 a.m.YYZ - IAD
1 stop11h 55mUnited Airlines
Wed 8/108:28 a.m.IAD - YYZ
Nonstop1h 36mUnited Airlines
Deal found 11/6C$ 243
Fri 11/78:45 a.m.YTZ - IAD
Nonstop1h 31mAir Transat
Mon 14/711:35 a.m.IAD - YTZ
Nonstop1h 33mAir Transat
Deal found 11/6C$ 247
Tue 7/108:10 a.m.YYZ - IAD
Nonstop1h 28mAir Canada
Wed 8/1010:20 a.m.IAD - YYZ
Nonstop1h 32mAir Canada
Deal found 12/6C$ 250
Sat 6/93:25 p.m.YTZ - IAD
1 stop5h 40mAir Canada
Wed 17/99:45 a.m.IAD - YTZ
1 stop5h 00mAir Canada
Deal found 11/6C$ 283
Thu 17/76:04 a.m.YYZ - IAD
1 stop5h 58mDelta
Sat 19/76:00 a.m.IAD - YYZ
1 stop8h 45mDelta
Deal found 12/6C$ 293
Tue 24/61:35 p.m.YTZ - IAD
Nonstop1h 31mMultiple Airlines
Tue 1/74:10 p.m.IAD - YTZ
Nonstop1h 33mMultiple Airlines
Deal found 11/6C$ 308
Thu 24/710:05 a.m.YYZ - IAD
Nonstop1h 34mMultiple Airlines
Mon 28/72:25 p.m.IAD - YYZ
Nonstop1h 36mMultiple Airlines
Deal found 10/6C$ 313
Fri 20/610:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Sun 22/611:35 a.m.IAD - YUL
1 stop4h 25mPorter Airlines
Deal found 10/6C$ 332
Sat 1/115:40 p.m.YUL - IAD
Nonstop1h 59mAir Canada
Mon 3/119:55 a.m.IAD - YUL
Nonstop1h 53mAir Canada
Deal found 12/6C$ 340
Fri 20/67:00 a.m.YUL - IAD
1 stop9h 33mDelta
Wed 25/67:10 a.m.IAD - YUL
1 stop10h 29mDelta
Deal found 10/6C$ 346
Thu 3/77:00 a.m.YYZ - IAD
1 stop4h 55mLufthansa
Sun 6/78:22 a.m.IAD - YYZ
Nonstop1h 42mLufthansa
Deal found 11/6C$ 366

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 629,999 searches. Data last updated 12 June 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 12/7

1:25 p.m.-2:56 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sat 19/7

4:10 p.m.-5:43 p.m.

Nonstop1h 33m

C$ 241

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 7/10

9:00 a.m.-8:55 p.m.

1 stop11h 55m

Washington, D.C. Dulles Intl

Wed 8/10

8:28 a.m.-10:04 a.m.

Nonstop1h 36m

C$ 243

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 11/7

8:45 a.m.-10:16 a.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Mon 14/7

11:35 a.m.-1:08 p.m.

Nonstop1h 33m

C$ 247

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 7/10

8:10 a.m.-9:38 a.m.

Nonstop1h 28m

Washington, D.C. Dulles Intl

Wed 8/10

10:20 a.m.-11:52 a.m.

Nonstop1h 32m

C$ 250

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 3/7

1:25 p.m.-2:56 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 6/7

11:35 a.m.-1:08 p.m.

Nonstop1h 33m

C$ 256

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 3/7

10:20 a.m.-4:20 p.m.

1 stop6h 00m

Washington, D.C. Dulles Intl

Sun 6/7

9:45 a.m.-4:46 p.m.

1 stop7h 01m

C$ 267

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 17/7

6:04 a.m.-12:02 p.m.

1 stop5h 58m

Washington, D.C. Dulles Intl

Sat 19/7

6:00 a.m.-2:45 p.m.

1 stop8h 45m

C$ 293

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 24/7

10:05 a.m.-11:39 a.m.

Nonstop1h 34m

Washington, D.C. Dulles Intl

Mon 28/7

2:25 p.m.-4:01 p.m.

Nonstop1h 36m

C$ 313

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 4/7

8:00 a.m.-1:42 p.m.

1 stop5h 42m

Washington, D.C. Dulles Intl

Sun 6/7

9:35 a.m.-11:30 a.m.

Nonstop1h 55m

C$ 332

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 27/6

10:45 a.m.-3:06 p.m.

1 stop4h 21m

Washington, D.C. Dulles Intl

Thu 24/7

4:10 p.m.-8:10 p.m.

1 stop4h 00m

C$ 334

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 51 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 C$ 256). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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 12 June 2025.

When flying from Region of Ontario to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 12 June 2025.

The most flights from CAON to IAD are scheduled on a Wednesday (18 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 12 June 2025.
Read through reviews of airlines operating flights from Ontario to Washington, D.C., such as Porter Airlines, Delta and Air Transat. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
288 reviews
Check prices

Boarding

8.2

Comfort

8.1

Entertainment

7.0

Overall

8.0

Food

7.6

Crew

8.7

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Porter Airlines
8.0
Very good
288 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Boarding

8.2

Comfort

8.1

Entertainment

7.0

Overall

8.0

Food

7.6

Crew

8.7

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Delta
8.0
Very good
7,946 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Boarding

8.2

Comfort

8.1

Entertainment

7.0

Overall

8.0

Food

7.6

Crew

8.7

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Air Transat
7.8
Good
396 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Boarding

8.2

Comfort

8.1

Entertainment

7.0

Overall

8.0

Food

7.6

Crew

8.7

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
United Airlines
7.4
Good
8,790 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Boarding

8.2

Comfort

8.1

Entertainment

7.0

Overall

8.0

Food

7.6

Crew

8.7

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
288 reviews
Check prices

Boarding

8.2

Comfort

8.1

Entertainment

7.0

Overall

8.0

Food

7.6

Crew

8.7

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!

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.

  • 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$ 157 on Air Canada. Other airlines that offer cheap prices include Air Transat from C$ 159 and Porter Airlines from C$ 160 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, Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl or Toronto Island - 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 (95%), Avianca (89%) and Republic Airways (84%).

  • 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$ 189. On average you can expect to pay C$ 2,114. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 272.

  • 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$ 256). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Herndon
Warrenton
Arlington
Hanover
Bel Air
Fairfax
Gaithersburg
Winchester
Falls Church
Alexandria
Manassas
Fredericksburg
Rockville

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

Top 5 airlines flying from Ontario to Dulles Intl

Discover the top 5 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 629,999 searches. Data last updated 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 202AverageC$ 383FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 223AverageC$ 356FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 257AverageC$ 477FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 272AverageC$ 531FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 426AverageC$ 558FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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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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