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Cheap flights from Ontario to Washington, D.C. Dulles Intl Airport from C$ 154

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 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
5 May — 12 May1
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 30 April 2025.

Round-trip from

C$ 249

One-way from

C$ 159

Popular in

August

Cheapest in

March

Average price

C$ 336

Good round-trip deal

C$ 231 or less

Good one-way deal

C$ 132 or less
Porter Airlines
  • Porter Airlines
  • 6/6-8/6
  • Nonstop
  • 3h 04m total
  • Ontario to Washington, D.C.
Search Deals
United Airlines
  • United Airlines
  • 28/5
  • Nonstop
  • 1h 39m total
  • Ontario to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 30 April 2025.

Fri 6/61:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 8/611:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 29/4C$ 249
Tue 27/56:15 a.m.YYZ - IAD
Nonstop1h 39mUnited Airlines
Tue 3/62:25 p.m.IAD - YYZ
Nonstop1h 34mUnited Airlines
Deal found 28/4C$ 278
Wed 28/51:35 p.m.YTZ - IAD
Nonstop1h 31mAir Transat
Wed 4/64:20 p.m.IAD - YTZ
Nonstop1h 33mAir Transat
Deal found 28/4C$ 284
Tue 7/107:47 p.m.YYZ - IAD
Nonstop1h 38mAir Canada
Wed 8/108:20 a.m.IAD - YYZ
1 stop8h 23mAir Canada
Deal found 29/4C$ 284
Tue 3/610:20 a.m.YTZ - IAD
1 stop5h 55mAir Canada
Wed 4/61:00 p.m.IAD - YTZ
1 stop5h 37mAir Canada
Deal found 29/4C$ 300
Sat 24/510:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Wed 28/54:20 p.m.IAD - YUL
1 stop5h 55mPorter Airlines
Deal found 27/4C$ 328
Sat 24/57:47 p.m.YYZ - IAD
Nonstop1h 38mMultiple Airlines
Mon 26/58:22 a.m.IAD - YYZ
Nonstop1h 42mMultiple Airlines
Deal found 28/4C$ 329
Thu 5/63:50 p.m.YYZ - IAD
1 stop7h 04mDelta
Tue 10/69:40 a.m.IAD - YYZ
1 stop7h 35mDelta
Deal found 29/4C$ 339
Fri 13/69:15 a.m.YUL - IAD
Nonstop1h 59mUnited Airlines
Fri 13/610:15 p.m.IAD - YUL
1 stop10h 20mUnited Airlines
Deal found 28/4C$ 345
Sat 14/67:10 p.m.YUL - IAD
Nonstop1h 58mAir Canada
Sat 5/75:31 p.m.IAD - YUL
Nonstop2h 14mAir Canada
Deal found 28/4C$ 358
Wed 28/52:20 p.m.YUL - IAD
Nonstop1h 59mMultiple Airlines
Tue 3/610:20 a.m.IAD - YUL
1 stop6h 01mMultiple Airlines
Deal found 28/4C$ 372
Thu 15/51:35 p.m.YTZ - IAD
Nonstop1h 31mMultiple Airlines
Mon 19/511:35 a.m.IAD - YTZ
Nonstop1h 33mMultiple Airlines
Deal found 29/4C$ 376

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 30 April 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

Fri 6/6

1:35 p.m.-3:06 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 8/6

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

Nonstop1h 33m

C$ 249

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 17/6

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

Nonstop1h 34m

Washington, D.C. Dulles Intl

Tue 24/6

8:22 a.m.-10:04 a.m.

Nonstop1h 42m

C$ 249

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 28/5

1:35 p.m.-3:06 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Wed 4/6

4:20 p.m.-5:53 p.m.

Nonstop1h 33m

C$ 284

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 20/5

7:47 p.m.-9:25 p.m.

Nonstop1h 38m

Washington, D.C. Dulles Intl

Tue 27/5

3:30 p.m.-5:09 p.m.

Nonstop1h 39m

C$ 293

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 3/6

10:20 a.m.-4:15 p.m.

1 stop5h 55m

Washington, D.C. Dulles Intl

Wed 4/6

1:00 p.m.-6:37 p.m.

1 stop5h 37m

C$ 300

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 28/5

1:35 p.m.-3:06 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Wed 4/6

4:20 p.m.-5:53 p.m.

Nonstop1h 33m

C$ 318

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Sat 24/5

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

1 stop4h 21m

Washington, D.C. Dulles Intl

Wed 28/5

4:20 p.m.-10:15 p.m.

1 stop5h 55m

C$ 328

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sat 24/5

7:47 p.m.-9:25 p.m.

Nonstop1h 38m

Washington, D.C. Dulles Intl

Mon 26/5

8:22 a.m.-10:04 a.m.

Nonstop1h 42m

C$ 329

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 5/6

3:50 p.m.-10:54 p.m.

1 stop7h 04m

Washington, D.C. Dulles Intl

Tue 10/6

9:40 a.m.-5:15 p.m.

1 stop7h 35m

C$ 339

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 13/6

9:15 a.m.-11:14 a.m.

Nonstop1h 59m

Washington, D.C. Dulles Intl

Fri 13/6

10:15 p.m.-8:35 a.m.

1 stop10h 20m

C$ 345

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/4

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 30 April 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 30 April 2025.

The most flights from CAON to IAD are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 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 30 April 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
285 reviews
Check prices

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.8

Overall

8.0

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Porter Airlines
8.0
Very good
285 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.8

Overall

8.0

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Delta
8.0
Very good
7,936 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.8

Overall

8.0

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Air Transat
7.8
Good
385 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.8

Overall

8.0

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Austrian Airlines
7.6
Good
780 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.8

Overall

8.0

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
United Airlines
7.4
Good
8,696 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.8

Overall

8.0

Comfort

8.1

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

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$ 159 on United Airlines. Other airlines that offer cheap prices include Porter Airlines from C$ 161 and Air Canada from C$ 181 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 ANA (90%), Avianca (87%) and Copa Airlines (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$ 175. On average you can expect to pay C$ 1,357. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 249.

  • 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 Dulles Intl flights
Pearson Intl to Reagan-National flights
Toronto Island to Dulles Intl flights
Pearson Intl to Baltimore flights
Vancouver Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Vancouver Intl to Baltimore flights
Toronto Island to Baltimore flights
Vancouver Intl to Reagan-National flights
Pierre Elliott Trudeau Intl to Baltimore flights
Calgary to Dulles Intl flights
Toronto Island to Reagan-National flights
Calgary to Baltimore flights
Ottawa to Dulles Intl flights
Edmonton to Dulles Intl flights
Calgary to Reagan-National flights
Ottawa to Reagan-National flights
Edmonton to Baltimore flights
Victoria to Reagan-National flights
Victoria to Baltimore flights
Victoria to Dulles Intl flights
Edmonton to Reagan-National flights
Québec City to Reagan-National flights
Halifax to Dulles Intl flights
Québec City to Dulles Intl flights
Ottawa to Baltimore flights
Halifax to Baltimore flights
Winnipeg to Dulles Intl flights
Halifax to Reagan-National flights
Winnipeg to Baltimore flights
Winnipeg to Reagan-National flights
Regina to Dulles Intl flights
Kelowna to Dulles Intl flights
London to Reagan-National flights
Québec City to Baltimore flights
Saskatoon to Reagan-National flights
Saskatoon to Baltimore flights
Kamloops to Dulles Intl flights
London to Baltimore flights
Kamloops to Baltimore flights
Kelowna to Reagan-National flights
Kelowna to Baltimore flights
London to Dulles Intl flights
Regina to Baltimore flights
Regina to Reagan-National flights
Fredericton to Dulles Intl flights
St. John's 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 205AverageC$ 388FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 226AverageC$ 357FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 260AverageC$ 508FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 267AverageC$ 544FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 467AverageC$ 571FlexibilityNo 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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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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