Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Washington, D.C. to Ontario from C$ 135

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
9 Sep — 16 Sep1
1 adult
1 adult, Economy, 0 bags

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

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to Ontario
Explore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 August 2026.

Sat 22/83:50 p.m. -
Nonstop1h 30m
Tue 25/89:15 a.m. -
Nonstop1h 30m
Deal found 6/8C$ 277
Tue 8/912:55 p.m. -
1 stop5h 25m
Tue 22/98:20 a.m. -
1 stop3h 54m
Deal found 9/8C$ 277
Sat 5/94:25 p.m. -
Nonstop1h 30m
Sun 6/99:50 a.m. -
Nonstop1h 30m
Deal found 7/8C$ 279
Thu 24/912:55 p.m. -
1 stop5h 25m
Sat 26/98:20 a.m. -
1 stop3h 54m
Deal found 8/8C$ 279
Thu 10/93:50 p.m. -
Nonstop1h 30m
Sun 13/99:15 a.m. -
Nonstop1h 30m
Deal found 5/8C$ 280
Sat 5/94:20 p.m. -
1 stop5h 11m
Sat 12/98:20 a.m. -
1 stop3h 54m
Deal found 8/8C$ 280
Sat 5/95:40 p.m. -
Nonstop1h 31m
Sun 6/93:45 p.m. -
Nonstop1h 23m
Deal found 5/8C$ 282
Sat 5/95:40 p.m. -
Nonstop1h 31m
Sat 12/93:15 p.m. -
Nonstop1h 23m
Deal found 5/8C$ 283
Sat 12/912:55 p.m. -
1 stop4h 12m
Fri 25/97:20 a.m. -
Nonstop1h 35m
Deal found 5/8C$ 283
Sat 5/94:25 p.m. -
Nonstop1h 30m
Sun 6/93:45 p.m. -
Nonstop1h 23m
Deal found 7/8C$ 284
Thu 27/812:40 p.m. -
1 stop5h 40m
Sun 30/88:20 a.m. -
1 stop3h 40m
Deal found 6/8C$ 284
Sat 26/911:25 a.m. -
Nonstop1h 30m
Sat 3/109:15 a.m. -
Nonstop1h 30m
Deal found 5/8C$ 286

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

Keep the following information in mind while searching for Washington, D.C. to Ontario flight deals. Data was last updated 10 August 2026.

Round-trip from

C$ 277

One-way from

C$ 135

Popular in

May

Cheapest in

January

Average price

C$ 440

Good round-trip deal

C$ 216 or less

Good one-way deal

C$ 136 or less
Porter Airlines
  • Porter Airlines
  • 10/10-13/10
  • Nonstop
  • 3h 00m total
  • Washington, D.C. to Ontario
Search Deals
Air Canada
  • Air Canada
  • 25/8
  • Nonstop
  • 1h 36m total
  • Washington, D.C. to Ontario
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$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Ontario.
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Ontario 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 10 August 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YTZ Toronto Island

DCAYTZ

Washington, D.C. Reagan-National

Mon 31/8

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

1 stop4h 41m

Toronto Island

Fri 4/9

8:20 a.m.-12:14 p.m.

1 stop3h 54m

C$ 304

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YTZ Toronto Island

DCAYTZ

Washington, D.C. Reagan-National

Wed 28/10

11:05 a.m.-3:56 p.m.

1 stop4h 51m

Toronto Island

Sat 31/10

8:20 a.m.-12:19 p.m.

1 stop3h 59m

C$ 304

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YTZ Toronto Island

DCAYTZ

Washington, D.C. Reagan-National

Sun 11/10

9:40 a.m.-2:20 p.m.

1 stop4h 40m

Toronto Island

Thu 15/10

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

1 stop3h 40m

C$ 326

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YTZ Toronto Island

DCAYTZ

Washington, D.C. Reagan-National

Fri 16/10

12:40 p.m.-6:15 p.m.

1 stop5h 35m

Toronto Island

Tue 20/10

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

1 stop3h 40m

C$ 344

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YTZ Toronto Island

DCAYTZ

Washington, D.C. Reagan-National

Fri 25/9

12:55 p.m.-6:20 p.m.

1 stop5h 25m

Toronto Island

Sun 27/9

8:20 a.m.-12:14 p.m.

1 stop3h 54m

C$ 344

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Wed 16/9

10:41 a.m.-5:56 p.m.

1 stop7h 15m

Toronto Pearson Intl

Mon 21/9

6:55 p.m.-8:25 p.m.

Nonstop1h 30m

C$ 355

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Sun 11/10

5:35 p.m.-10:56 p.m.

1 stop5h 21m

Toronto Pearson Intl

Tue 13/10

6:00 a.m.-12:39 p.m.

1 stop6h 39m

C$ 376

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Fri 16/10

3:30 p.m.-8:44 p.m.

1 stop5h 14m

Toronto Pearson Intl

Tue 20/10

7:30 a.m.-11:59 a.m.

1 stop4h 29m

C$ 376

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Mon 21/9

7:25 p.m.-10:59 p.m.

1 stop3h 34m

Toronto Pearson Intl

Mon 12/10

2:26 p.m.-11:07 p.m.

1 stop8h 41m

C$ 376

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Thu 20/8

6:15 a.m.-3:46 p.m.

1 stop9h 31m

Toronto Pearson Intl

Tue 25/8

2:45 p.m.-12:44 a.m.

1 stop9h 59m

C$ 376

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

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

Best time to book a flight from Washington, D.C. to Ontario

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

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of C$ 435). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of C$ 514). 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 WAS to ON?

Find hourly flight availability from Washington, D.C. to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 August 2026.

When flying from Washington, D.C. to Region of Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 24% versus a flight in the evening.

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

Explore weekly flight availability from Washington, D.C. to Ontario. 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 10 August 2026.

The most flights from WAS to CAON are scheduled on a Friday (36 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (19 on average).

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

Airfare is below average for this route at the moment.
Washington, D.C. to Region of Ontario flights typically cost between C$ 401 and C$ 599 in September.
The cheapest round-trip price found within the last 5 days was C$ 283 on Air Canada (12 Sep-25 Sep).

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

The price you pay for your flight from Washington, D.C. to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 78 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Ontario. Price data was last updated on 8 August 2026.

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 10 August 2026.
Get a feel of what it's like to fly with Porter Airlines and Air Canada from Washington, D.C. to Ontario by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
453 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
453 reviews
Porter Airlines
8.0
Very good
453 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,456 reviews
Porter Airlines
8.0
Very good
453 reviews
Check prices

Entertainment

6.9

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

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

    Departing from Washington, D.C. to Region of Ontario will take you 5h 25m. Airlines will cover a distance of 566 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Washington, D.C. to Region of Ontario 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$ 112. United Airlines flights start at C$ 123 while deals on Air Canada start at C$ 136 one-way.

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

    The most popular route from Washington, D.C. to Region of Ontario is Washington, D.C. Reagan-National - Toronto Pearson Intl. You may also consider Washington, D.C. Dulles Intl - Toronto Pearson Intl or Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl.

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

    Before booking your flight to Region of Ontario from Washington, D.C., check out the most reliable airlines to get you to your destination on time: ANA (79%), United Airlines (76%), Copa Airlines( 71%).

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

    On average you can expect to pay C$ 421 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is C$ 136 while the most popular route, (Washington, D.C. Reagan-National - Toronto Pearson Intl) is currently priced at C$ 312.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of C$ 435). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of C$ 514). 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

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

Discover the top 4 airlines that operate flights from Washington, D.C. to Ontario. 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 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 177AverageC$ 573FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 228AverageC$ 556FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 285AverageC$ 409FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 300AverageC$ 513FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 Washington, D.C. to Ontario?

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

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

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

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington, D.C. to Ontario, users can toggle the no change fees filter when performing a flight search.

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

Of course! You can now track prices for flights from Washington, D.C. to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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.