Find flights
Deals
When to book
FAQs

Cheap flights from Ontario to Washington, D.C. from C$ 186

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — WAS
23 Jul — 30 Jul1
1 adult
1 adult, Economy, 0 bags

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

Enter your travel dates to find the best prices.

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 23 June 2026.

Thu 16/78:55 a.m.
YTZ
-
IAD
Nonstop1h 30m
Porter Airlines
Sun 19/73:55 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 23/6C$ 291
Fri 17/71:40 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Tue 21/711:05 a.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 18/6C$ 292
Thu 23/78:55 a.m.
YTZ
-
IAD
Nonstop1h 30m
Porter Airlines
Sun 26/73:55 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 19/6C$ 294
Sat 11/71:40 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Sun 12/73:55 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 20/6C$ 295
Fri 10/78:55 a.m.
YTZ
-
IAD
Nonstop1h 30m
Porter Airlines
Sun 12/73:55 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 20/6C$ 297
Thu 6/81:40 p.m.
YTZ
-
IAD
Nonstop1h 30m
Porter Airlines
Thu 13/83:50 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 22/6C$ 298
Wed 8/78:55 a.m.
YTZ
-
IAD
Nonstop1h 30m
Porter Airlines
Wed 8/73:55 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 19/6C$ 299
Fri 3/78:55 a.m.
YTZ
-
IAD
Nonstop1h 30m
Porter Airlines
Sun 5/711:05 a.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 18/6C$ 304
Tue 21/71:40 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Tue 28/73:55 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 23/6C$ 306
Fri 24/77:20 a.m.
YYZ
-
DCA
Nonstop1h 32m
Air Canada
Mon 27/76:59 a.m.
DCA
-
YYZ
Nonstop1h 36m
Air Canada
Deal found 21/6C$ 345
Fri 24/71:55 p.m.
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Sun 26/79:55 a.m.
IAD
-
YYZ
Nonstop1h 26m
Air Canada
Deal found 20/6C$ 345
Fri 10/76:25 p.m.
YYZ
-
DCA
Nonstop1h 32m
Air Canada
Sun 12/76:55 p.m.
DCA
-
YYZ
Nonstop1h 31m
Air Canada
Deal found 19/6C$ 346

Find 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 23 June 2026.

Round-trip from

C$ 291

One-way from

C$ 186

Popular in

March

Cheapest in

October

Average price

C$ 402

Good round-trip deal

C$ 308 or less

Good one-way deal

C$ 227 or less
Porter Airlines
  • Porter Airlines
  • 23/7-26/7
  • Nonstop
  • 3h 00m total
  • Ontario to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 8/7
  • Nonstop
  • 1h 30m total
  • Ontario to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Ontario to Washington, D.C. (WAS).
Search Deals

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 23 June 2026.
Use the filters below to find and compare flights from Ontario to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 3/7

1:40 p.m.-3:11 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 7/7

3:55 p.m.-5:25 p.m.

Nonstop1h 30m

C$ 319
Quickest round-trip

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 12/7

8:55 a.m.-10:25 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Sun 2/8

3:50 p.m.-5:20 p.m.

Nonstop1h 30m

C$ 335

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 16/7

8:55 a.m.-10:25 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 5/8

11:25 a.m.-12:55 p.m.

Nonstop1h 30m

C$ 335

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 16/8

9:15 a.m.-10:45 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Mon 24/8

3:50 p.m.-5:20 p.m.

Nonstop1h 30m

C$ 342

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 3/7

1:40 p.m.-3:11 p.m.

Nonstop1h 31m

Washington, D.C. Dulles Intl

Mon 6/7

11:05 a.m.-12:35 p.m.

Nonstop1h 30m

C$ 345

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 9/7

8:55 a.m.-10:25 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 15/7

11:05 a.m.-12:35 p.m.

Nonstop1h 30m

C$ 348

TorontoWashington, D.C.

YTZ - DCA

YTZDCA

Toronto Island

Thu 27/8

8:20 a.m.-12:00 p.m.

1 stop3h 40m

Washington, D.C. Reagan-National

Tue 1/9

9:40 a.m.-2:21 p.m.

1 stop4h 41m

C$ 352

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 24/7

8:55 a.m.-10:25 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Sun 26/7

11:05 a.m.-12:35 p.m.

Nonstop1h 30m

C$ 367

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 22/7

8:55 a.m.-10:25 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Sun 26/7

11:05 a.m.-12:35 p.m.

Nonstop1h 30m

C$ 367

TorontoWashington, D.C.

YTZ - DCA

YTZDCA

Toronto Island

Fri 17/7

8:20 a.m.-12:00 p.m.

1 stop3h 40m

Washington, D.C. Reagan-National

Tue 21/7

6:00 a.m.-11:51 a.m.

1 stop5h 51m

C$ 372

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of C$ 111). Flying from Region of Ontario to Washington, D.C. in February is currently the most expensive (average of C$ 799). 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 23 June 2026.

It’s typically best to fly out from Region of Ontario to Washington, D.C. in the afternoon. Doing so could potentially save you 26% on the flight price compared to flying in the evening, which is usually more expensive.

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 23 June 2026.

The most flights from CAON to WAS are scheduled on a Monday (31 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 on average).

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

How far ahead should I book a flight from Region of Ontario to Washington, D.C.?

Booking 57 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest day to fly from Region of Ontario to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Washington, D.C.. Price data was last updated on 20 June 2026.

Travelers seeking maximum savings on their Region of Ontario to Washington, D.C. flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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. This flight may include one or multiple stops.

  • 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 Porter Airlines, which is currently one of the cheapest options available, starting at C$ 142. Air Transat flights start at C$ 151 while deals on United Airlines start at C$ 196 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. Dulles Intl or Toronto Island - Washington, D.C. Dulles Intl, Toronto Pearson Intl - Washington, D.C. Reagan-National 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: Avianca (92%), Copa Airlines (91%), Republic Airways( 91%).

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

    On average you can expect to pay C$ 491 for a flight from Region of Ontario to Washington, D.C.. The cheapest flight overall is C$ 231 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Reagan-National) is currently priced at C$ 387.

  • 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, January is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of C$ 111). Flying from Region of Ontario to Washington, D.C. in February is currently the most expensive (average of C$ 799). 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
Silver Spring
Hanover
Fairfax
Oxon Hill
Gaithersburg
Reston
Herndon
Ellicott City
Arlington
Fredericksburg
Alexandria
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.

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 23 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 129AverageC$ 490FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 190AverageC$ 340FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 233AverageC$ 454FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 235AverageC$ 652FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 305AverageC$ 532FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapestC$ 360AverageC$ 560FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 657AverageC$ 806FlexibilityNo 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 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.

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.