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Cheap flights from Washington, D.C. to Ontario from C$ 129

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 18/6. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
3 Jun — 10 Jun1
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 4 May 2026.

Fri 5/65:15 p.m.
IAD
-
YTZ
Nonstop1h 27m
Air Canada
Mon 8/62:55 p.m.
YTZ
-
IAD
Nonstop1h 17m
Air Canada
Deal found 3/5C$ 257
Sun 7/612:45 p.m.
DCA
-
YTZ
1 stop5h 37m
Air Canada
Wed 10/68:20 a.m.
YTZ
-
DCA
1 stop3h 41m
Air Canada
Deal found 29/4C$ 260
Thu 14/511:30 a.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sun 17/51:50 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Deal found 29/4C$ 264
Wed 27/54:05 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Wed 3/61:50 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Deal found 30/4C$ 265
Sun 7/65:15 p.m.
IAD
-
YTZ
Nonstop1h 27m
Air Canada
Wed 10/62:55 p.m.
YTZ
-
IAD
Nonstop1h 17m
Air Canada
Deal found 29/4C$ 266
Wed 3/64:05 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sun 7/61:50 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Deal found 30/4C$ 268
Fri 5/66:55 p.m.
DCA
-
YYZ
Nonstop1h 32m
Air Canada
Mon 8/67:00 a.m.
YYZ
-
DCA
1 stop5h 01m
Air Canada
Deal found 3/5C$ 269
Fri 29/511:30 a.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sun 31/59:15 a.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Deal found 1/5C$ 270
Thu 28/54:05 p.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Thu 4/61:50 p.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Deal found 29/4C$ 272
Wed 17/65:15 p.m.
IAD
-
YTZ
Nonstop1h 27m
Air Canada
Wed 24/610:45 a.m.
YTZ
-
IAD
1 stop4h 16m
Air Canada
Deal found 3/5C$ 273
Fri 29/511:30 a.m.
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Mon 1/69:15 a.m.
YTZ
-
IAD
Nonstop1h 31m
Porter Airlines
Deal found 30/4C$ 274
Sat 6/65:15 p.m.
IAD
-
YTZ
Nonstop1h 27m
Multiple Airlines
Sun 7/61:50 p.m.
YTZ
-
IAD
Nonstop1h 31m
Multiple Airlines
Deal found 1/5C$ 276

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 4 May 2026.

Round-trip from

C$ 257

One-way from

C$ 129

Popular in

November

Cheapest in

June

Average price

C$ 395

Good round-trip deal

C$ 238 or less

Good one-way deal

C$ 113 or less
Air Canada
  • Air Canada
  • 5/6-8/6
  • Nonstop
  • 2h 44m total
  • Washington, D.C. to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 18/6
  • Nonstop
  • 1h 30m total
  • Washington, D.C. to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 4 May 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
Quickest round-trip

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Mon 8/6

11:30 a.m.-1:00 p.m.

Nonstop1h 30m

Toronto Island

Wed 10/6

1:50 p.m.-3:21 p.m.

Nonstop1h 31m

C$ 322

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Fri 5/6

5:28 p.m.-10:59 p.m.

1 stop5h 31m

Toronto Pearson Intl

Mon 8/6

6:29 p.m.-11:21 p.m.

1 stop4h 52m

C$ 355

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Wed 27/5

6:00 a.m.-1:30 p.m.

1 stop7h 30m

Toronto Pearson Intl

Fri 29/5

12:09 p.m.-4:31 p.m.

1 stop4h 22m

C$ 355

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 29/5

4:05 p.m.-5:35 p.m.

Nonstop1h 30m

Toronto Island

Sun 7/6

1:50 p.m.-3:21 p.m.

Nonstop1h 31m

C$ 366

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 30/5

11:30 a.m.-1:00 p.m.

Nonstop1h 30m

Toronto Island

Wed 3/6

1:50 p.m.-3:21 p.m.

Nonstop1h 31m

C$ 366

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 27/5

4:05 p.m.-5:35 p.m.

Nonstop1h 30m

Toronto Island

Sat 30/5

9:15 a.m.-10:46 a.m.

Nonstop1h 31m

C$ 366

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 13/6

5:20 p.m.-11:02 p.m.

1 stop5h 42m

Toronto Pearson Intl

Mon 15/6

6:03 a.m.-11:48 a.m.

1 stop5h 45m

C$ 412

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Tue 26/5

1:30 p.m.-5:55 p.m.

1 stop4h 25m

Toronto Pearson Intl

Tue 2/6

7:55 a.m.-12:48 p.m.

1 stop4h 53m

C$ 413

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Mon 1/6

7:40 p.m.-11:41 p.m.

1 stop4h 01m

Toronto Pearson Intl

Sat 6/6

6:00 a.m.-10:55 a.m.

1 stop4h 55m

C$ 413

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Fri 12/6

7:40 p.m.-11:40 p.m.

1 stop4h 00m

Toronto Pearson Intl

Mon 15/6

2:32 p.m.-10:55 p.m.

1 stop8h 23m

C$ 413

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, June is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of C$ 378). Flying from Washington, D.C. to Region of Ontario in February is currently the most expensive (average of C$ 1,239). 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 4 May 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 28% versus a flight in the afternoon.

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 2 May 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.

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 4 May 2026.

The most flights from WAS to CAON are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

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

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 4 May 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
436 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.6

Comfort

8.0

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
436 reviews
Porter Airlines
8.0
Very good
436 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.6

Comfort

8.0

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,995 reviews
Porter Airlines
8.0
Very good
436 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.6

Comfort

8.0

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 1h 30m. Airlines will cover a distance of 546 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$ 95. Air Canada flights start at C$ 127 while deals on American Airlines start at C$ 138 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. Dulles Intl - Toronto Pearson Intl. You may also consider Washington, D.C. Reagan-National - 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 (84%), Republic Airways (81%), Air Canada( 79%).

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

    On average you can expect to pay C$ 505 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is C$ 286 while the most popular route, (Washington, D.C. Dulles Intl - Toronto Pearson Intl) is currently priced at C$ 330.

  • 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, June is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of C$ 378). Flying from Washington, D.C. to Region of Ontario in February is currently the most expensive (average of C$ 1,239). 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 5 airlines flying from Washington, D.C. to Ontario

Discover the top 5 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 4 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 202AverageC$ 480FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 223AverageC$ 388FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Porter AirlinesCheapestC$ 277AverageC$ 403FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 356AverageC$ 500FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 450AverageC$ 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 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.

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