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Cheap flights from Ontario to Washington, D.C. Dulles Intl Airport from C$ 162

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
2 Apr — 9 Apr1
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 28 March 2025.

Round-trip from

C$ 254

One-way from

C$ 162

Popular in

August

Cheapest in

April

Average price

C$ 383

Good round-trip deal

C$ 270 or less

Good one-way deal

C$ 187 or less
Porter Airlines
  • Porter Airlines
  • 14/4-17/4
  • Nonstop
  • 2h 59m total
  • Ontario to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 25/4
  • 1 total stop
  • 4h 47m total
  • Ontario to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 1 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease (C$ 4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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.
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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 28 March 2025.

Mon 14/411:30 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Thu 17/41:45 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 27/3C$ 254
Fri 25/412:45 p.m.YYZ - IAD
Nonstop1h 34mAir Canada
Fri 2/512:40 p.m.IAD - YYZ
Nonstop1h 39mAir Canada
Deal found 26/3C$ 254
Mon 14/48:25 a.m.YTZ - IAD
1 stop4h 47mAir Canada
Fri 18/44:07 p.m.IAD - YTZ
1 stop5h 28mAir Canada
Deal found 27/3C$ 260
Tue 6/58:35 a.m.YYZ - IAD
1 stop5h 53mUnited Airlines
Sun 11/512:50 p.m.IAD - YYZ
1 stop4h 13mUnited Airlines
Deal found 27/3C$ 263
Sun 25/58:45 a.m.YTZ - IAD
Nonstop1h 31mAir Transat
Thu 12/611:35 a.m.IAD - YTZ
Nonstop1h 33mAir Transat
Deal found 26/3C$ 266
Sat 12/46:00 p.m.YTZ - IAD
Nonstop1h 29mMultiple Airlines
Sun 13/47:00 a.m.IAD - YTZ
Nonstop1h 30mMultiple Airlines
Deal found 27/3C$ 290
Thu 24/46:00 a.m.YYZ - IAD
1 stop7h 02mDelta
Sun 27/46:00 a.m.IAD - YYZ
1 stop5h 25mDelta
Deal found 27/3C$ 297
Tue 15/412:20 p.m.YYZ - IAD
1 stop4h 08mMultiple Airlines
Sat 19/45:44 p.m.IAD - YYZ
1 stop5h 55mMultiple Airlines
Deal found 27/3C$ 299
Sat 19/46:05 a.m.YOW - IAD
1 stop5h 50mUnited Airlines
Sun 20/45:10 p.m.IAD - YOW
Nonstop1h 42mUnited Airlines
Deal found 27/3C$ 347
Sat 12/411:30 a.m.YUL - IAD
1 stop4h 58mAir Canada
Mon 14/45:44 p.m.IAD - YUL
Nonstop2h 01mAir Canada
Deal found 28/3C$ 347
Wed 7/57:29 p.m.YOW - IAD
Nonstop1h 44mAir Canada
Tue 27/510:30 a.m.IAD - YOW
1 stop4h 34mAir Canada
Deal found 27/3C$ 349
Wed 16/46:00 a.m.YUL - IAD
1 stop5h 44mUnited Airlines
Wed 30/410:10 p.m.IAD - YUL
1 stop13h 35mUnited Airlines
Deal found 27/3C$ 359

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 28 March 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

Mon 14/4

11:30 a.m.-12:59 p.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Thu 17/4

1:45 p.m.-3:15 p.m.

Nonstop1h 30m

C$ 254

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 25/4

12:45 p.m.-2:19 p.m.

Nonstop1h 34m

Washington, D.C. Dulles Intl

Fri 2/5

12:40 p.m.-2:19 p.m.

Nonstop1h 39m

C$ 254

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Mon 14/4

8:25 a.m.-1:12 p.m.

1 stop4h 47m

Washington, D.C. Dulles Intl

Fri 18/4

4:07 p.m.-9:35 p.m.

1 stop5h 28m

C$ 260

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 6/5

8:35 a.m.-2:28 p.m.

1 stop5h 53m

Washington, D.C. Dulles Intl

Sun 11/5

12:50 p.m.-5:03 p.m.

1 stop4h 13m

C$ 263

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 25/5

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Thu 12/6

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

Nonstop1h 33m

C$ 266

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 12/4

6:00 p.m.-7:29 p.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Wed 16/4

7:00 a.m.-8:30 a.m.

Nonstop1h 30m

C$ 290

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 24/4

6:00 a.m.-1:02 p.m.

1 stop7h 02m

Washington, D.C. Dulles Intl

Sun 27/4

6:00 a.m.-11:25 a.m.

1 stop5h 25m

C$ 297

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 15/4

12:20 p.m.-4:28 p.m.

1 stop4h 08m

Washington, D.C. Dulles Intl

Sat 19/4

5:44 p.m.-11:39 p.m.

1 stop5h 55m

C$ 299

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sat 19/4

6:05 a.m.-11:55 a.m.

1 stop5h 50m

Washington, D.C. Dulles Intl

Sun 20/4

5:10 p.m.-6:52 p.m.

Nonstop1h 42m

C$ 347

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Sat 12/4

11:30 a.m.-4:28 p.m.

1 stop4h 58m

Washington, D.C. Dulles Intl

Mon 14/4

5:44 p.m.-7:45 p.m.

Nonstop2h 01m

C$ 347

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/3

Showing 1-10 of 48 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 28 March 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.

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 28 March 2025.
Read through reviews of airlines operating flights from Ontario to Washington, D.C., such as Delta, Porter Airlines and Air Transat. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Porter Airlines
7.9
Good
276 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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$ 162 on Air Canada. Other airlines that offer cheap prices include United Airlines from C$ 170 and Air Transat from C$ 177 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, Toronto Island - Washington, D.C. Dulles Intl or Montreal Pierre Elliott Trudeau Intl - 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 Avianca (81%), Copa Airlines (81%) and ANA (81%).

  • 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$ 1,354. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 227.

  • 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
Fairfax
Bel Air
Chantilly
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
Vancouver Intl to Dulles Intl flights
Pearson Intl to Baltimore flights
Toronto Island to Dulles Intl flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Vancouver Intl to Baltimore flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Vancouver Intl to Reagan-National flights
Pierre Elliott Trudeau Intl to Baltimore flights
Ottawa to Dulles Intl flights
Calgary to Baltimore flights
Ottawa to Reagan-National flights
Calgary to Dulles Intl flights
Calgary to Reagan-National flights
Edmonton to Dulles Intl flights
Toronto Island to Reagan-National flights
Toronto Island to Baltimore flights
Edmonton to Reagan-National flights
Edmonton to Baltimore flights
Québec City to Dulles Intl flights
Québec City to Reagan-National flights
Ottawa to Baltimore flights
Winnipeg to Dulles Intl flights
Winnipeg to Baltimore flights
Québec City to Baltimore flights
Winnipeg to Reagan-National flights
Halifax to Dulles Intl flights
Halifax to Baltimore flights
Halifax to Reagan-National flights
Victoria to Dulles Intl flights
Saskatoon to Reagan-National flights
Kamloops to Dulles Intl flights
Kelowna to Dulles Intl flights
Saskatoon to Baltimore flights
Kamloops to Baltimore flights
London to Dulles Intl flights
London to Reagan-National flights
Victoria to Reagan-National flights
Fredericton to Dulles Intl flights
London to Baltimore flights
Victoria to Baltimore flights
Kelowna to Baltimore flights
Kelowna to Reagan-National flights
Regina to Baltimore flights
Regina to Reagan-National flights
St. John's to Dulles Intl flights
Regina to Dulles Intl 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 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 235AverageC$ 374FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 296AverageC$ 574FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 309AverageC$ 407FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 341AverageC$ 521FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 494AverageC$ 590FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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How does Cheapflights help users find flights from Ontario to Dulles Intl?

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Cheapflights helps you find that perfect flight to Dulles Intl from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to Dulles Intl with no change fees?

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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