Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ontario to Washington, D.C. Dulles Intl Airport from C$ 161

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — IAD
5 Aug — 12 Aug1
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 31 July 2025.

Round-trip from

C$ 226

One-way from

C$ 161

Popular in

June

Cheapest in

April

Average price

C$ 399

Good round-trip deal

C$ 231 or less

Good one-way deal

C$ 179 or less
Porter Airlines
  • Porter Airlines
  • 12/9-20/9
  • Nonstop
  • 3h 04m total
  • Ontario to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 21/8
  • Nonstop
  • 1h 31m total
  • Ontario to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 39 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 July 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.
Search Deals

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 31 July 2025.

Fri 12/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sat 20/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 29/7C$ 226
Fri 19/912:10 p.m.YYZ - IAD
Nonstop1h 28mAir Canada
Mon 22/92:25 p.m.IAD - YYZ
Nonstop1h 32mAir Canada
Deal found 29/7C$ 255
Thu 4/98:45 a.m.YTZ - IAD
Nonstop1h 31mMultiple Airlines
Sun 7/99:45 a.m.IAD - YTZ
1 stop5h 00mMultiple Airlines
Deal found 29/7C$ 279
Sat 30/81:25 p.m.YTZ - IAD
Nonstop1h 31mAir Transat
Tue 2/94:20 p.m.IAD - YTZ
Nonstop1h 33mAir Transat
Deal found 29/7C$ 284
Sat 6/93:25 p.m.YTZ - IAD
1 stop5h 40mAir Canada
Tue 9/99:35 a.m.IAD - YTZ
1 stop7h 10mAir Canada
Deal found 31/7C$ 308
Sat 13/910:05 a.m.YYZ - IAD
Nonstop1h 40mUnited Airlines
Sat 20/912:41 p.m.IAD - YYZ
Nonstop1h 38mUnited Airlines
Deal found 30/7C$ 312
Wed 27/86:04 a.m.YYZ - IAD
1 stop5h 58mDelta
Wed 3/96:15 p.m.IAD - YYZ
1 stop4h 43mDelta
Deal found 29/7C$ 314
Sun 14/98:35 a.m.YOW - IAD
1 stop6h 31mPorter Airlines
Fri 19/94:20 p.m.IAD - YOW
1 stop4h 14mPorter Airlines
Deal found 29/7C$ 327
Thu 25/95:00 a.m.YUL - IAD
1 stop4h 38mMultiple Airlines
Fri 26/94:20 p.m.IAD - YUL
1 stop3h 50mMultiple Airlines
Deal found 29/7C$ 341
Thu 14/810:45 a.m.YUL - IAD
1 stop4h 11mPorter Airlines
Mon 18/84:10 p.m.IAD - YUL
1 stop6h 05mPorter Airlines
Deal found 28/7C$ 342
Thu 21/87:00 a.m.YYZ - IAD
1 stop6h 49mLufthansa
Sun 24/83:41 p.m.IAD - YYZ
Nonstop1h 38mLufthansa
Deal found 30/7C$ 352
Wed 27/89:15 a.m.YUL - IAD
Nonstop1h 58mUnited Airlines
Sun 31/85:37 p.m.IAD - YUL
Nonstop2h 08mUnited Airlines
Deal found 31/7C$ 371

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 31 July 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 12/9

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sat 20/9

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

Nonstop1h 33m

C$ 226

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Fri 19/9

12:10 p.m.-1:38 p.m.

Nonstop1h 28m

Washington, D.C. Dulles Intl

Mon 22/9

2:25 p.m.-3:57 p.m.

Nonstop1h 32m

C$ 255

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 4/9

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 7/9

9:45 a.m.-2:45 p.m.

1 stop5h 00m

C$ 279

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 21/8

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 26/8

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

Nonstop1h 33m

C$ 297

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 6/9

3:25 p.m.-9:05 p.m.

1 stop5h 40m

Washington, D.C. Dulles Intl

Tue 9/9

9:35 a.m.-4:45 p.m.

1 stop7h 10m

C$ 308

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sat 13/9

10:05 a.m.-11:45 a.m.

Nonstop1h 40m

Washington, D.C. Dulles Intl

Sat 20/9

12:41 p.m.-2:19 p.m.

Nonstop1h 38m

C$ 312

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Wed 27/8

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

1 stop5h 58m

Washington, D.C. Dulles Intl

Wed 3/9

6:15 p.m.-10:58 p.m.

1 stop4h 43m

C$ 314

OttawaWashington, D.C.

YOW - IAD

YOWIAD

Ottawa

Sun 14/9

8:35 a.m.-3:06 p.m.

1 stop6h 31m

Washington, D.C. Dulles Intl

Fri 19/9

4:20 p.m.-8:34 p.m.

1 stop4h 14m

C$ 327

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 25/9

5:00 a.m.-9:38 a.m.

1 stop4h 38m

Washington, D.C. Dulles Intl

Fri 26/9

4:20 p.m.-8:10 p.m.

1 stop3h 50m

C$ 341

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 14/8

10:45 a.m.-2:56 p.m.

1 stop4h 11m

Washington, D.C. Dulles Intl

Sun 17/8

11:35 a.m.-4:00 p.m.

1 stop4h 25m

C$ 342

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 46 results
1
2
3
...
5

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 31 July 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 31 July 2025.

The most flights from CAON to IAD are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

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

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 31 July 2025.
Get a feel of what it's like to fly with Porter Airlines,Delta, andAir Transat from Ontario to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
318 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,980 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Transat
7.7
Good
424 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,902 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
WestJet
7.2
Good
2,977 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Overall

8.0

Food

7.6

Crew

8.7

Boarding

8.2

Comfort

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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$ 161 on Porter Airlines. Other airlines that offer cheap prices include Air Canada from C$ 163 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 ANA (100%), Republic Airways (82%) and United Airlines (82%).

  • 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$ 198. On average you can expect to pay C$ 1,588. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 294.

  • 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Herndon
Warrenton
Hanover
Reston
Fairfax
Ellicott City
Oxon Hill
Gaithersburg
Winchester
Arlington
Alexandria
Manassas
Fredericksburg
Rockville

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Pierre Elliott Trudeau Intl to Reagan-National flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Vancouver Intl to Dulles Intl flights
Ottawa to Dulles Intl flights
Pierre Elliott Trudeau Intl to Baltimore flights
Vancouver Intl to Baltimore flights
Vancouver Intl to Reagan-National flights
Calgary to Dulles Intl flights
Ottawa to Reagan-National flights
Calgary to Reagan-National flights
Winnipeg to Dulles Intl flights
Calgary to Baltimore flights
Toronto Island to Baltimore flights
Toronto Island to Reagan-National flights
Halifax to Dulles Intl flights
Winnipeg to Reagan-National flights
Edmonton to Baltimore flights
Ottawa to Baltimore flights
Edmonton to Dulles Intl flights
Edmonton to Reagan-National flights
Winnipeg to Baltimore flights
Halifax to Baltimore flights
Halifax to Reagan-National flights
Québec City to Dulles Intl flights
Regina to Baltimore flights
Saskatoon to Baltimore flights
Québec City to Reagan-National flights
Victoria to Dulles Intl flights
Saskatoon to Reagan-National flights
Québec City to Baltimore flights
Fredericton to Dulles Intl flights
Victoria to Reagan-National flights
Victoria to Baltimore flights
Regina to Dulles Intl flights
Kelowna to Dulles Intl flights
London to Dulles Intl flights
Hamilton to Reagan-National flights
Regina to Reagan-National flights
Kelowna to Baltimore flights
Thunder Bay to Dulles Intl flights
Kelowna to Reagan-National flights
London to Baltimore flights
Kamloops 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 31 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 204AverageC$ 377FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 213AverageC$ 351FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 267AverageC$ 484FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 272AverageC$ 533FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 430AverageC$ 576FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to Dulles Intl?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.