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$77+ Cheap flights from Washington, D.C. (WAS) to Ontario

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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap 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 August 20, 2025.

Round-trip from

$205
(Mytrip)

One-way from

$77
(Mytrip)

Popular in

August

Cheapest in

June

Average price

$321

Good round-trip deal

$228 or less

Good one-way deal

$106 or less
From Washington, D.C. (WAS) to Ontario
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One-way flight from Washington, D.C. (WAS) to Ontario
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Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Ontario.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to Ontario.
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Find flight deals from Washington, D.C. to Ontario

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 August 20, 2025.

This Mytrip deal was found by Cheapflights users on 8/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/114:20 pmIAD - YTZ
Nonstop1h 33mPorter Airlines
Mon 9/151:35 pmYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/18$205
This Mytrip deal was found by Cheapflights users on 8/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:35 amIAD - YTZ
Nonstop1h 33mPorter Airlines
Sun 9/148:45 amYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/19$208
This Mytrip deal was found by Cheapflights users on 8/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/154:20 pmIAD - YTZ
Nonstop1h 33mPorter Airlines
Mon 9/221:35 pmYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/18$209
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/104:20 pmIAD - YTZ
Nonstop1h 33mPorter Airlines
Thu 9/111:35 pmYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/19$210
This Mytrip deal was found by Cheapflights users on 8/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:20 pmIAD - YTZ
Nonstop1h 33mPorter Airlines
Mon 9/158:45 amYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/18$211
This Flightnetwork deal was found by Cheapflights users on 8/18. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/210:20 amIAD - YYZ
Nonstop1h 32mAir Canada
Sun 10/58:10 amYYZ - IAD
Nonstop1h 28mAir Canada
Deal found 8/18$212
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:20 pmIAD - YTZ
Nonstop1h 33mPorter Airlines
Tue 9/231:35 pmYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/19$213
This Mytrip deal was found by Cheapflights users on 8/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1811:35 amIAD - YTZ
Nonstop1h 33mPorter Airlines
Sun 9/218:45 amYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/18$214
This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:20 pmIAD - YTZ
Nonstop1h 33mPorter Airlines
Sun 9/148:45 amYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/18$216
This Booking.com deal was found by Cheapflights users on 8/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:20 amIAD - YYZ
Nonstop1h 32mAir Canada
Sat 9/2012:10 pmYYZ - IAD
Nonstop1h 28mAir Canada
Deal found 8/18$216
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2511:35 amIAD - YTZ
Nonstop1h 33mPorter Airlines
Sun 9/281:35 pmYTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 8/18$217
This Mytrip deal was found by Cheapflights users on 8/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:00 amDCA - YYZ
1 stop5h 39mAir Canada
Sun 9/217:25 amYYZ - DCA
Nonstop1h 34mAir Canada
Deal found 8/18$217

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 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Ontario that are best for you.

Fly from

Washington, D.C.

Fly to

Ontario

Route

Depart

Return

Price

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 9/11

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Mon 9/15

1:35 pm-3:06 pm

Nonstop1h 31m

$205

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 9/11

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Sun 9/14

8:45 am-10:16 am

Nonstop1h 31m

$207

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 10/2

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Thu 10/9

1:35 pm-3:06 pm

Nonstop1h 31m

$207

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 9/17

9:35 am-6:45 pm

2 stops9h 10m

Toronto Island

Sat 9/20

1:35 pm-3:06 pm

Nonstop1h 31m

$208

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Tue 9/9

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Sun 9/14

8:45 am-10:16 am

Nonstop1h 31m

$208

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 9/17

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Sat 9/20

1:35 pm-3:06 pm

Nonstop1h 31m

$209

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 10/3

11:35 am-1:08 pm

Nonstop1h 33m

Toronto Island

Mon 10/6

1:35 pm-3:06 pm

Nonstop1h 31m

$210

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 9/27

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Sun 9/28

1:35 pm-3:06 pm

Nonstop1h 31m

$210

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 9/19

11:35 am-1:08 pm

Nonstop1h 33m

Toronto Island

Sun 9/21

8:45 am-10:16 am

Nonstop1h 31m

$210

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Thu 9/18

6:00 am-11:39 am

1 stop5h 39m

Toronto Pearson Intl

Sun 9/21

7:25 am-8:59 am

Nonstop1h 34m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 60 results
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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 $243). Flying from Washington, D.C. to Region of Ontario in August is currently the most expensive (average of $348). 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 August 20, 2025.

When flying from Washington, D.C. to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 August 20, 2025.

The most flights from WAS to CAON are scheduled on a Monday (30 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 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 August 20, 2025.
Peruse reviews from past customers who have flown with Porter Airlines, Air Transat, and United Airlines from Washington, D.C. to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
339 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.7

Entertainment

7.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
339 reviews
Porter Airlines
8.0
Very good
339 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.7

Entertainment

7.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Transat
7.7
Good
430 reviews
Porter Airlines
8.0
Very good
339 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.7

Entertainment

7.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,928 reviews
Porter Airlines
8.0
Very good
339 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.7

Entertainment

7.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
339 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.7

Entertainment

7.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
8.0
Very good
339 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.7

Entertainment

7.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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?

    A quick flight from Washington, D.C. to Region of Ontario can take about 1h 33m. Porter Airlines provides one of the quickest options available for as low as $205. The distance from Washington, D.C. to Region of Ontario is about 339 mi. This flight may include one or multiple stops.

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

    The most popular flight routes from Washington, D.C. to Region of Ontario are Washington, D.C. Reagan-National - Toronto Pearson Intl, Washington, D.C. Dulles Intl - Toronto Pearson Intl and Washington, D.C. Reagan-National - 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 (87%), Republic Airways (75%), United Airlines( 75%).

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

    On average you can expect to pay $841 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $106 while the most popular route, (Washington, D.C. Reagan-National - Toronto Pearson Intl) is currently priced at $246.

  • 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 $243). Flying from Washington, D.C. to Region of Ontario in August is currently the most expensive (average of $348). 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

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Alternative routes for Washington, D.C. to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
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Reagan-National to Deer Lake flights
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Reagan-National to Red Deer flights
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Top 7 airlines flying from Washington, D.C. to Ontario

Discover the top 7 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 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$54Average$324FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$120Average$435FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$132Average$397FlexibilityNo cancel feeOn-time69%
Air TransatCheapest$176Average$245FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$228Average$376FlexibilityNo cancel feeOn-time71%
DeltaCheapest$242Average$322FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$278Average$537FlexibilityNo cancel feeOn-time60%

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