HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington, D.C.

$128+ Cheap flights from Ontario to Washington, D.C. (WAS)

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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — WAS
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 March 21, 2026.

This Trip.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1811:30 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Sun 4/196:00 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/21$202
This Trip.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:25 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Mon 4/1311:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/17$203
This SmartFares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:10 pm
YYZ
-
DCA
Nonstop1h 33m
Air Canada
Sun 4/126:59 am
DCA
-
YYZ
Nonstop1h 32m
Air Canada
Deal found 3/20$204
This FlightHub deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/149:15 am
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Sat 5/1611:30 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/20$204
This Trip.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1111:30 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Fri 4/176:00 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/17$205
This FlightHub deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:25 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Fri 4/246:00 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/17$206
This FlightHub deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:50 pm
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Tue 6/211:30 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/20$207
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:25 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Sun 4/126:00 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/18$208
This SmartFares deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/97:55 am
YTZ
-
DCA
1 stop4h 06m
Air Canada
Sun 4/1212:55 pm
DCA
-
YTZ
1 stop5h 27m
Air Canada
Deal found 3/19$208
This FlightHub deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1111:30 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Tue 4/1411:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Deal found 3/21$211
This SmartFares deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:15 am
YYZ
-
DCA
1 stop3h 46m
Air Canada
Sun 4/126:59 am
DCA
-
YYZ
Nonstop1h 32m
Air Canada
Deal found 3/19$212
This SmartFares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1110:45 am
YTZ
-
DCA
1 stop4h 45m
Air Canada
Sun 4/124:10 pm
DCA
-
YTZ
1 stop5h 22m
Air Canada
Deal found 3/20$212

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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$202
(Trip.com)

One-way from

$128
(FlightHub)

Popular in

March

Cheapest in

October

Average price

$320

Good round-trip deal

$120 or less

Good one-way deal

$130 or less
Provider with most accurate pricing for Toronto (YTO)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-Washington, D.C. (WAS) flights.
Search Deals
From Ontario to Washington, D.C. (WAS)
Search Deals
One-way flight from Ontario to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 2,558,603 searches. Data last updated March 21, 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

Wed 6/3

1:50 pm-3:21 pm

Nonstop1h 31m

Washington, D.C. Dulles Intl

Mon 6/8

4:05 pm-5:35 pm

Nonstop1h 30m

$216

TorontoWashington, D.C.

YTZ - DCA

YTZDCA

Toronto Island

Sat 4/11

5:30 pm-9:55 pm

1 stop4h 25m

Washington, D.C. Reagan-National

Sun 4/12

12:55 pm-6:22 pm

1 stop5h 27m

$218

TorontoWashington, D.C.

YTZ - DCA

YTZDCA

Toronto Island

Mon 5/4

3:35 pm-9:55 pm

2 stops6h 20m

Washington, D.C. Reagan-National

Mon 5/11

6:00 am-1:17 pm

2 stops7h 17m

$220

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 5/7

7:43 pm-9:25 pm

Nonstop1h 42m

Washington, D.C. Dulles Intl

Sat 5/9

5:17 pm-7:02 pm

Nonstop1h 45m

$232

TorontoWashington, D.C.

YTZ - DCA

YTZDCA

Toronto Island

Fri 4/17

7:55 am-12:01 pm

1 stop4h 06m

Washington, D.C. Reagan-National

Tue 4/21

11:00 am-3:52 pm

1 stop4h 52m

$238

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 5/7

9:30 am-3:03 pm

1 stop5h 33m

Washington, D.C. Dulles Intl

Sat 5/9

9:45 am-2:22 pm

1 stop4h 37m

$240
Quickest round-trip

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Mon 4/13

9:25 am-10:54 am

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 4/20

11:40 am-1:10 pm

Nonstop1h 30m

$242

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Thu 5/14

12:45 pm-2:24 pm

Nonstop1h 39m

Washington, D.C. Dulles Intl

Sat 5/16

3:15 pm-8:44 pm

1 stop5h 29m

$242

TorontoWashington, D.C.

YYZ - DCA

YYZDCA

Toronto Pearson Intl

Tue 5/12

5:25 pm-7:13 pm

Nonstop1h 48m

Washington, D.C. Reagan-National

Wed 5/13

6:00 am-2:43 pm

1 stop8h 43m

$243

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 4/15

9:25 am-10:54 am

Nonstop1h 29m

Washington, D.C. Dulles Intl

Wed 4/22

11:40 am-1:10 pm

Nonstop1h 30m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

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 $78). Flying from Region of Ontario to Washington, D.C. in March is currently the most expensive (average of $176). 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 March 21, 2026.

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

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 March 14, 2026.

Travelers seeking maximum savings on their Region of Ontario to Washington, D.C. flight should consider departing on Sunday 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.

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 March 21, 2026.

The most flights from CAON to WAS are scheduled on a Monday (27 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (25 on average).

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.?

    Porter Airlines, Air Canada, and United Airlines can get you from Region of Ontario to Washington, D.C. in just under 1h 31m. Your travel time can differ by up to 2h 54m. Airlines will cover a distance of 339 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Porter Airlines, with whom users have recently found tickets for as low as $89. However, be on the lookout for offers from United Airlines and Air Canada, as they are both options that can get you from Region of Ontario to Washington, D.C. for a low price.

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

    Most travelers choose Toronto Pearson Intl - Washington, D.C. Reagan-National, Toronto Pearson Intl - Washington, D.C. Dulles Intl or Toronto Island - Washington, D.C. Dulles Intl when deciding on the best route from Region of Ontario to Washington, D.C..

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

    The top 3 most reliable airlines when flying from Region of Ontario to Washington, D.C. are Avianca (70%), Copa Airlines (70%) and Republic Airways (70%).

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

    On average you can expect to pay $441 for a flight from Region of Ontario to Washington, D.C.. The cheapest flight overall is $173 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Reagan-National) is currently priced at $239.

  • 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 $78). Flying from Region of Ontario to Washington, D.C. in March is currently the most expensive (average of $176). 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

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Owings Mills
Arlington
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Fredericksburg
Largo
Bowie
Clinton
Towson
College Park
Cordova

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 6 airlines flying from Ontario to Washington, D.C.

Discover the top 6 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 2,558,603 searches. Data last updated March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$133Average$356FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$158Average$350FlexibilityNo cancel feeOn-time67%
Porter AirlinesCheapest$189Average$329FlexibilityNo cancel feeOn-time52%
American AirlinesCheapest$218Average$302FlexibilityNo cancel feeOn-time71%
DeltaCheapest$246Average$404FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$303Average$334FlexibilityNo cancel feeOn-time60%

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.