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$92+ 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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap 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 February 21, 2026.

This Trip.com deal was found by Cheapflights users on 2/18. 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.
Thu 3/1211:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Mon 3/168:55 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/18$198
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 3/1811:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sat 4/411:00 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/19$202
This Kiwi.com deal was found by Cheapflights users on 2/18. 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.
Mon 3/3011:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Wed 4/19:25 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/18$203
This Trip.com deal was found by Cheapflights users on 2/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:00 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sun 4/123:45 pm
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/19$204
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Mon 3/2311:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Thu 4/29:25 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/19$206
This Trip.com deal was found by Cheapflights users on 2/18. 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.
Wed 3/1111:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Wed 3/258:55 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/18$207
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Mon 3/168:55 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/17$208
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Thu 4/1611:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Tue 4/219:25 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/19$209
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Thu 4/1611:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sat 4/1811:00 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 2/19$210
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Mon 3/98:09 am
IAD
-
YYZ
1 stop30h 11m
Multiple Airlines
Thu 3/268:20 pm
YYZ
-
IAD
1 stop11h 04m
Multiple Airlines
Deal found 2/19$216
This Mytrip deal was found by Cheapflights users on 2/18. 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 3/1212:55 pm
DCA
-
YTZ
1 stop5h 15m
Air Canada
Mon 3/169:30 am
YTZ
-
DCA
1 stop6h 01m
Air Canada
Deal found 2/18$217
This Booking.com deal was found by Cheapflights users on 2/18. 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.
Sat 4/46:59 am
DCA
-
YYZ
Nonstop1h 34m
Air Canada
Sat 4/119:10 pm
YYZ
-
DCA
Nonstop1h 33m
Air Canada
Deal found 2/18$220

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 February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$198
(Trip.com)

One-way from

$92
(Trip.com)

Popular in

November

Cheapest in

June

Average price

$311

Good round-trip deal

$231 or less

Good one-way deal

$130 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Toronto (YTO) flights.
Search Deals
From Washington, D.C. (WAS) to Ontario
Search Deals
One-way flight from Washington, D.C. (WAS) to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 2,558,603 searches. Data last updated February 21, 2026.
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

Wed 4/8

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Fri 4/24

3:45 pm-5:14 pm

Nonstop1h 29m

$208

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 3/11

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Thu 3/12

8:55 am-10:24 am

Nonstop1h 29m

$208

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 4/24

6:00 pm-7:30 pm

Nonstop1h 30m

Toronto Island

Mon 4/27

9:25 am-10:54 am

Nonstop1h 29m

$211

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 4/10

6:00 pm-7:30 pm

Nonstop1h 30m

Toronto Island

Tue 4/14

9:25 am-10:54 am

Nonstop1h 29m

$217

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 4/16

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Sun 4/19

3:45 pm-5:14 pm

Nonstop1h 29m

$220

Washington, D.C.Toronto

DCA - YTZ

DCAYTZ

Washington, D.C. Reagan-National

Sun 4/5

12:55 pm-6:17 pm

1 stop5h 22m

Toronto Island

Sun 4/12

7:50 am-12:01 pm

1 stop4h 11m

$223

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 3/11

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Fri 3/13

3:45 pm-5:14 pm

Nonstop1h 29m

$223

Washington, D.C.Toronto

DCA - YTZ

DCAYTZ

Washington, D.C. Reagan-National

Thu 4/9

12:55 pm-6:17 pm

1 stop5h 22m

Toronto Island

Sun 4/12

7:50 am-12:01 pm

1 stop4h 11m

$225

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 4/23

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Sun 5/10

9:15 am-10:46 am

Nonstop1h 31m

$226

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 3/14

1:45 pm-3:15 pm

Nonstop1h 30m

Toronto Island

Wed 3/18

8:55 am-10:24 am

Nonstop1h 29m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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, September is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $105). Flying from Washington, D.C. to Region of Ontario in August is currently the most expensive (average of $171). 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 February 21, 2026.

It’s optimal to fly from Washington, D.C. to Region of Ontario at noon. By choosing this option you can save up to 34% on the cost of your flight, compared to a flight in the morning.

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 November 25, 2025.

Travelers seeking maximum savings on their Washington, D.C. to Region of Ontario flight should consider departing on Sunday mornings when fares are most often at their lowest. Sunday evenings 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 February 21, 2026.

The most flights from WAS to CAON are scheduled on a Monday (30 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 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 February 21, 2026.
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
419 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Porter Airlines
8.0
Very good
419 reviews
Porter Airlines
8.0
Very good
419 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Air Transat
7.7
Good
511 reviews
Porter Airlines
8.0
Very good
419 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
United Airlines
7.4
Good
9,336 reviews
Porter Airlines
8.0
Very good
419 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
American Airlines
7.2
Good
11,336 reviews
Porter Airlines
8.0
Very good
419 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Air Canada
7.1
Good
10,734 reviews
Porter Airlines
8.0
Very good
419 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

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 30m. Porter Airlines provides one of the quickest options available for as low as $208. 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 cheapest airlines to fly from Washington, D.C. to Region of Ontario one-way?

    $75 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on Air Canada and Air Transat, with prices starting from $79 and $95, respectively.

  • 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. Reagan-National - Montreal Pierre Elliott Trudeau Intl and Washington, D.C. Dulles Intl - Toronto Pearson 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: Avianca (71%), Copa Airlines (71%), Republic Airways( 71%).

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

    On average you can expect to pay $1,217 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $108 while the most popular route, (Washington, D.C. Reagan-National - Toronto Pearson Intl) is currently priced at $243.

  • 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, September is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $105). Flying from Washington, D.C. to Region of Ontario in August is currently the most expensive (average of $171). 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.
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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 February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$54Average$349FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$108Average$389FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$161Average$386FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$176Average$245FlexibilityNo cancel feeOn-time50%
DeltaCheapest$240Average$326FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$262Average$378FlexibilityNo cancel feeOn-time71%
WestJetCheapest$349Average$504FlexibilityNo cancel feeOn-time60%

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