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Cheap flights from Washington, D.C. to Ontario from C$ 103

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
4 Aug — 11 Aug1
1 adult

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 30 July 2025.

Round-trip from

C$ 248

One-way from

C$ 103

Popular in

November

Cheapest in

June

Average price

C$ 394

Good round-trip deal

C$ 206 or less

Good one-way deal

C$ 97 or less
Porter Airlines
  • Porter Airlines
  • 25/9-27/9
  • Nonstop
  • 3h 04m total
  • Washington, D.C. to Ontario
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Porter Airlines
  • Porter Airlines
  • 18/9
  • Nonstop
  • 1h 33m total
  • Washington, D.C. to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 24 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
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Average for round-trip flights in July 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 30 July 2025.

Thu 25/911:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Sat 27/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 29/7C$ 248
Thu 4/96:00 a.m.DCA - YYZ
1 stop4h 39mAir Canada
Sun 7/98:00 a.m.YYZ - DCA
1 stop4h 08mAir Canada
Deal found 29/7C$ 265
Wed 27/89:35 a.m.IAD - YTZ
1 stop5h 11mAir Canada
Fri 29/83:25 p.m.YTZ - IAD
1 stop5h 36mAir Canada
Deal found 28/7C$ 273
Wed 27/89:35 a.m.IAD - YTZ
1 stop5h 11mMultiple Airlines
Fri 29/81:25 p.m.YTZ - IAD
Nonstop1h 31mMultiple Airlines
Deal found 28/7C$ 279
Thu 4/92:25 p.m.IAD - YYZ
Nonstop1h 32mAir Canada
Sun 7/98:10 a.m.YYZ - IAD
Nonstop1h 28mAir Canada
Deal found 29/7C$ 280
Sat 13/98:16 p.m.BWI - YYZ
1 stop17h 49mMultiple Airlines
Sat 20/96:30 a.m.YYZ - BWI
1 stop8h 17mMultiple Airlines
Deal found 30/7C$ 301
Wed 3/97:45 p.m.DCA - YYZ
1 stop3h 58mDelta
Thu 23/106:00 a.m.YYZ - DCA
1 stop4h 06mDelta
Deal found 29/7C$ 334
Wed 3/96:00 a.m.IAD - YYZ
1 stop7h 32mDelta
Wed 22/103:35 p.m.YYZ - IAD
1 stop7h 26mDelta
Deal found 29/7C$ 334
Thu 11/96:20 a.m.IAD - YYZ
1 stop5h 24mUnited Airlines
Thu 18/912:45 p.m.YYZ - IAD
Nonstop1h 40mUnited Airlines
Deal found 27/7C$ 341
Sat 13/94:20 p.m.IAD - YUL
1 stop3h 50mPorter Airlines
Sat 20/910:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Deal found 28/7C$ 361
Thu 11/910:20 a.m.IAD - YUL
1 stop11h 21mMultiple Airlines
Mon 15/910:45 a.m.YUL - IAD
1 stop4h 21mMultiple Airlines
Deal found 29/7C$ 363
Thu 4/96:35 a.m.IAD - YYZ
1 stop9h 11mMultiple Airlines
Sun 7/98:10 a.m.YYZ - IAD
Nonstop1h 28mMultiple Airlines
Deal found 29/7C$ 363

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 30 July 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 25/9

11:35 a.m.-1:08 p.m.

Nonstop1h 33m

Toronto Island

Sat 27/9

1:35 p.m.-3:06 p.m.

Nonstop1h 31m

C$ 248

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Thu 4/9

6:00 a.m.-10:39 a.m.

1 stop4h 39m

Toronto Pearson Intl

Sun 7/9

8:00 a.m.-12:08 p.m.

1 stop4h 08m

C$ 265

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 27/8

9:35 a.m.-2:46 p.m.

1 stop5h 11m

Toronto Island

Fri 29/8

3:25 p.m.-9:01 p.m.

1 stop5h 36m

C$ 273

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 27/8

9:35 a.m.-2:46 p.m.

1 stop5h 11m

Toronto Island

Fri 29/8

1:25 p.m.-2:56 p.m.

Nonstop1h 31m

C$ 279

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 4/9

2:25 p.m.-3:57 p.m.

Nonstop1h 32m

Toronto Pearson Intl

Sun 7/9

8:10 a.m.-9:38 a.m.

Nonstop1h 28m

C$ 280

BaltimoreToronto

BWI - YYZ

BWIYYZ

Baltimore/Washington

Sat 13/9

8:16 p.m.-2:05 p.m.

1 stop17h 49m

Toronto Pearson Intl

Sat 20/9

6:30 a.m.-2:47 p.m.

1 stop8h 17m

C$ 301

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Wed 3/9

5:30 p.m.-10:58 p.m.

1 stop5h 28m

Toronto Pearson Intl

Fri 24/10

3:35 p.m.-10:58 p.m.

1 stop7h 23m

C$ 334

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Wed 3/9

6:15 p.m.-10:58 p.m.

1 stop4h 43m

Toronto Pearson Intl

Thu 23/10

6:00 a.m.-11:57 a.m.

1 stop5h 57m

C$ 334

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 11/9

6:20 a.m.-11:44 a.m.

1 stop5h 24m

Toronto Pearson Intl

Thu 18/9

12:45 p.m.-2:25 p.m.

Nonstop1h 40m

C$ 341

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Sat 13/9

4:20 p.m.-8:10 p.m.

1 stop3h 50m

Montreal Pierre Elliott Trudeau Intl

Sat 20/9

10:45 a.m.-3:06 p.m.

1 stop4h 21m

C$ 361

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

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 C$ 167). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 30 July 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 30 July 2025.

The most flights from WAS to CAON are scheduled on a Monday (29 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (16 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 30 July 2025.
Get a feel of what it's like to fly with Porter Airlines,Delta, andAir Transat 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
318 reviews
Check prices

Crew

8.7

Entertainment

7.0

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

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
318 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Crew

8.7

Entertainment

7.0

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

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
Delta
8.0
Very good
7,980 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Crew

8.7

Entertainment

7.0

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

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
424 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Crew

8.7

Entertainment

7.0

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

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
8,896 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Crew

8.7

Entertainment

7.0

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

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
318 reviews
Check prices

Crew

8.7

Entertainment

7.0

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

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.

  • 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$ 103. American Airlines flights start at C$ 116 while deals on Air Canada start at C$ 116 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. Dulles Intl - Toronto Island or Washington, D.C. Reagan-National - Toronto Pearson Intl.

  • 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$ 167). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of C$ 258). 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.
Dulles Intl to Pearson Intl flights
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Dulles Intl to Sault Ste Marie flights
Dulles Intl to Regina flights
Dulles Intl to London flights
Reagan-National to Regina flights
Dulles Intl to Sydney flights

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 30 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 159AverageC$ 482FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 170AverageC$ 430FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 182AverageC$ 484FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 243AverageC$ 529FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
WestJetCheapestC$ 470AverageC$ 632FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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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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