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Cheap flights from Ontario to Washington, D.C. from C$ 170

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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — WAS
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Ontario to Washington, D.C.

Keep the following information in mind while searching for Ontario to Washington, D.C. flight deals. Data was last updated 11 September 2025.

Round-trip from

C$ 251

One-way from

C$ 170

Popular in

June

Cheapest in

April

Average price

C$ 327

Good round-trip deal

C$ 267 or less

Good one-way deal

C$ 154 or less
Porter Airlines
  • Porter Airlines
  • 25/9-29/9
  • Nonstop
  • 3h 04m total
  • Ontario to Washington, D.C.
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Air Canada
  • Air Canada
  • 2/10
  • 1 total stop
  • 3h 58m total
  • Ontario to Washington, D.C.
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Highest demand for flights based on searches. 4% potential increase in price (C$ 23 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ontario to Washington, D.C. (WAS).
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Price to beat on a one-way flight from Ontario to Washington, D.C. (WAS).
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Find flight deals from Ontario to Washington, D.C.

Cheapest flights from Ontario to Washington, D.C.
Explore the most affordable flight options available from Ontario to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Thu 25/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Mon 29/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 9/9C$ 251
Thu 9/108:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Thu 16/1011:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 9/9C$ 254
Thu 6/118:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Wed 12/1111:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 9/9C$ 255
Thu 2/108:55 p.m.YYZ - DCA
Nonstop1h 39mAir Canada
Sun 5/106:59 a.m.DCA - YYZ
Nonstop1h 32mAir Canada
Deal found 9/9C$ 256
Thu 9/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 12/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 9/9C$ 256
Fri 3/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sat 18/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 9/9C$ 258
Wed 8/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Wed 15/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 10/9C$ 259
Mon 3/118:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Thu 6/1111:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 9/9C$ 262
Tue 30/94:30 p.m.YYZ - DCA
Nonstop1h 34mAir Canada
Mon 13/106:00 a.m.DCA - YYZ
1 stop4h 39mAir Canada
Deal found 9/9C$ 263
Fri 26/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 28/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 8/9C$ 263
Thu 2/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 5/1011:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 10/9C$ 265
Wed 1/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Tue 7/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 10/9C$ 266

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Washington, D.C. 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 11 September 2025.
Use the filters below to find and compare flights from Ontario to Washington, D.C. that are best for you.

Fly from

Ontario

Fly to

Washington, D.C.

Route

Depart

Return

Price

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 3/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Wed 15/10

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

Nonstop1h 33m

C$ 258

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 2/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 5/10

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

Nonstop1h 33m

C$ 266

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 5/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 7/10

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

Nonstop1h 33m

C$ 269

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 15/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Fri 17/10

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

Nonstop1h 33m

C$ 269

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 2/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sun 12/10

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

Nonstop1h 33m

C$ 270

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 7/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 14/10

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

Nonstop1h 33m

C$ 270

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 2/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sat 18/10

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

Nonstop1h 33m

C$ 270

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 9/11

8:55 a.m.-10:24 a.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sun 9/11

6:30 p.m.-8:00 p.m.

Nonstop1h 30m

C$ 270

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 18/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Mon 20/10

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

Nonstop1h 33m

C$ 272

TorontoWashington, D.C.

YYZ - DCA

YYZDCA

Toronto Pearson Intl

Thu 2/10

7:25 a.m.-8:59 a.m.

Nonstop1h 34m

Washington, D.C. Reagan-National

Wed 8/10

6:59 a.m.-8:31 a.m.

Nonstop1h 32m

C$ 281

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

What is the cheapest month to book a flight from Region of Ontario to Washington, D.C.?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of C$ 256). Flying from Region of Ontario to Washington, D.C. 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 WAS?

Find hourly flight availability from Ontario to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Washington, D.C. as you normally would.

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

Explore weekly flight availability from Ontario to Washington, D.C.. 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 11 September 2025.

The most flights from CAON to WAS are scheduled on a Wednesday (28 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (21 on average).

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

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington, D.C.. 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.?

    Departing from Region of Ontario to Washington, D.C. will take you 1h 31m. The distance between Region of Ontario and Washington, D.C. is about 546 km. All flights are typically direct.

  • What are the cheapest airlines to fly from Region of Ontario to Washington, D.C. one-way?

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at C$ 170. Air Transat flights start at C$ 175 while deals on Porter Airlines start at C$ 175 one-way.

  • What are the most popular routes from Region of Ontario to Washington, D.C.?

    While some choose either Toronto Pearson Intl - Washington, D.C. Reagan-National or Toronto Island - Washington, D.C. Dulles Intl, Toronto Pearson Intl - Washington, D.C. Dulles Intl is the most popular route from Region of Ontario to Washington, D.C..

  • What are the most reliable airlines from Region of Ontario to Washington, D.C.?

    Before booking your flight to Washington, D.C. from Region of Ontario, check out the most reliable airlines to get you to your destination on time: Republic Airways (86%), Air Canada (83%), Copa Airlines( 80%).

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

    On average you can expect to pay C$ 1,327 for a flight from Region of Ontario to Washington, D.C.. The cheapest flight overall is C$ 233 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at C$ 287.

  • Can I find deals for flights from Ontario to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Ontario to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington, D.C..

  • Can I find deals for business class flights from Ontario to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Ontario to Washington, D.C. 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.?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of C$ 256). Flying from Region of Ontario to Washington, D.C. 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.?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Washington, D.C.

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

Top 7 airlines flying from Ontario to Washington, D.C.

Discover the top 7 airlines that operate flights from Ontario to Washington, D.C.. 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 185AverageC$ 340FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 200AverageC$ 430FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 205AverageC$ 352FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
American AirlinesCheapestC$ 211AverageC$ 418FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 270AverageC$ 592FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 311AverageC$ 374FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 384AverageC$ 543FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ontario to Washington, D.C.?

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 Washington, D.C. from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to Washington, D.C.?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Washington, D.C. for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to Washington, D.C. with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Washington, D.C. flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Washington, D.C. become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Ontario today and book when prices fit your budget.

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