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Cheap flights from Washington, D.C. Dulles Intl Airport to Ontario from C$ 106

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
3 Aug — 10 Aug1
1 adult

Cheap flight deals from Dulles Intl to Ontario

Keep the following information in mind while searching for Dulles Intl to Ontario flight deals. Data was last updated 29 July 2025.

Round-trip from

C$ 266

One-way from

C$ 106

Popular in

November

Cheapest in

June

Average price

C$ 392

Good round-trip deal

C$ 354 or less

Good one-way deal

C$ 97 or less
Porter Airlines
  • Porter Airlines
  • 30/8-31/8
  • Nonstop
  • 3h 04m total
  • Washington, D.C. to Ontario
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Porter Airlines
  • Porter Airlines
  • 14/9
  • 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).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Ontario.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Ontario.
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Find flight deals from Dulles Intl to Ontario

Cheapest flights from Dulles Intl to Ontario
Explore the most affordable flight options available from Dulles Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2025.

Thu 25/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Sat 27/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 29/7C$ 247
Tue 19/89:35 a.m.IAD - YYZ
1 stop5h 00mAir Canada
Tue 26/84:30 p.m.YYZ - IAD
1 stop4h 31mAir Canada
Deal found 28/7C$ 285
Wed 3/94:20 p.m.IAD - YTZ
Nonstop1h 33mMultiple Airlines
Mon 8/98:45 a.m.YTZ - IAD
Nonstop1h 31mMultiple Airlines
Deal found 26/7C$ 305
Tue 19/89:35 a.m.IAD - YTZ
1 stop5h 11mAir Canada
Tue 26/83:25 p.m.YTZ - IAD
1 stop5h 36mAir Canada
Deal found 28/7C$ 313
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$ 339
Fri 10/1011:35 a.m.IAD - YUL
1 stop4h 25mPorter Airlines
Tue 14/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Deal found 26/7C$ 359
Wed 10/99:35 a.m.IAD - YUL
Nonstop1h 53mAir Canada
Wed 17/97:10 p.m.YUL - IAD
Nonstop1h 55mAir Canada
Deal found 27/7C$ 361
Mon 18/85:11 p.m.IAD - YYZ
1 stop5h 47mDelta
Wed 20/84:11 p.m.YYZ - IAD
1 stop6h 44mDelta
Deal found 27/7C$ 370
Thu 4/93:41 p.m.IAD - YYZ
Nonstop1h 38mMultiple Airlines
Sun 7/98:10 a.m.YYZ - IAD
Nonstop1h 28mMultiple Airlines
Deal found 26/7C$ 380
Fri 22/84:10 p.m.IAD - YOW
1 stop3h 28mPorter Airlines
Mon 25/89:35 a.m.YOW - IAD
1 stop5h 21mPorter Airlines
Deal found 27/7C$ 401
Mon 22/911:35 a.m.IAD - YUL
1 stop7h 45mMultiple Airlines
Mon 29/98:55 a.m.YUL - IAD
1 stop6h 11mMultiple Airlines
Deal found 27/7C$ 418
Fri 22/84:10 p.m.IAD - YOW
1 stop3h 28mMultiple Airlines
Mon 25/87:29 p.m.YOW - IAD
Nonstop1h 43mMultiple Airlines
Deal found 27/7C$ 450

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 29 July 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ontario that are best for you.

Fly from

Dulles Intl

Fly to

Ontario

Route

Depart

Return

Price

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 30/8

4:10 p.m.-5:43 p.m.

Nonstop1h 33m

Toronto Island

Sun 31/8

9:05 a.m.-10:36 a.m.

Nonstop1h 31m

C$ 266

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 19/8

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

1 stop5h 00m

Toronto Pearson Intl

Tue 26/8

4:30 p.m.-9:01 p.m.

1 stop4h 31m

C$ 285

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 3/9

4:20 p.m.-5:53 p.m.

Nonstop1h 33m

Toronto Island

Mon 8/9

8:45 a.m.-10:16 a.m.

Nonstop1h 31m

C$ 305

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Tue 19/8

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

1 stop5h 11m

Toronto Island

Tue 26/8

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

1 stop5h 36m

C$ 313

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 30/8

4:10 p.m.-5:43 p.m.

Nonstop1h 33m

Toronto Island

Sun 31/8

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

Nonstop1h 31m

C$ 331

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$ 339

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Fri 10/10

11:35 a.m.-4:00 p.m.

1 stop4h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 14/10

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

1 stop4h 21m

C$ 359

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Wed 10/9

9:35 a.m.-11:28 a.m.

Nonstop1h 53m

Montreal Pierre Elliott Trudeau Intl

Wed 17/9

7:10 p.m.-9:05 p.m.

Nonstop1h 55m

C$ 361

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 18/8

5:11 p.m.-10:58 p.m.

1 stop5h 47m

Toronto Pearson Intl

Thu 28/8

2:50 p.m.-11:26 p.m.

1 stop8h 36m

C$ 370

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 4/9

8:40 a.m.-1:47 p.m.

1 stop5h 07m

Toronto Pearson Intl

Sun 7/9

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

Nonstop1h 28m

C$ 380

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 54 results
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Best time to book a flight from Dulles Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Dulles Intl 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. Dulles Intl Airport to Ontario

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario (average of C$ 167). Flying from Washington, D.C. Dulles Intl Airport 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 IAD to ON?

Find hourly flight availability from Dulles Intl 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 29 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Region of Ontario as you normally would.

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

Explore weekly flight availability from Dulles Intl 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 29 July 2025.

The most flights from IAD to CAON are scheduled on a Friday (22 on average). You will have fewer flight options on Saturday, 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. Dulles Intl Airport 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 29 July 2025.
See what other customers who have flown with Porter Airlines,Delta, andAir Transat from Washington, D.C. Dulles Intl Airport to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
317 reviews
Check prices

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Crew

8.7

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
317 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Crew

8.7

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
7,979 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Crew

8.7

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
317 reviews
Check prices

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Crew

8.7

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
317 reviews
Check prices

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Crew

8.7

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
WestJet
7.2
Good
2,972 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.0

Food

7.6

Crew

8.7

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 Dulles Intl 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. Dulles Intl Airport to Region of Ontario one-way?

    The cheapest airline one-way is Porter Airlines, with whom users have recently found tickets for as low as C$ 106. However, be on the lookout for offers from Air Canada and Air Transat, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Region of Ontario for a low price.

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

    When deciding which route to take from Washington, D.C. Dulles Intl Airport to Region of Ontario consider Washington, D.C. Dulles Intl - Toronto Pearson Intl, Washington, D.C. Dulles Intl - Toronto Island or Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl as they are the most popular.

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

    Before booking your flight to Region of Ontario from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: ANA (89%), United Airlines (78%), Republic Airways( 76%).

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

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Region of Ontario? While on average our users pay C$ 522, our data indicates the cheapest price to be C$ 109. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around C$ 332.

  • Can I find deals for flights from Dulles Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Ontario?

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

  • Can I find deals for business class flights from Dulles Intl to Ontario?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario (average of C$ 167). Flying from Washington, D.C. Dulles Intl Airport 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 Dulles Intl to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Toronto Island flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Baltimore to Pearson Intl flights
Dulles Intl to Vancouver Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Dulles Intl to Calgary flights
Baltimore to Vancouver Intl flights
Reagan-National to Vancouver Intl flights
Baltimore to Calgary flights
Dulles Intl to Halifax flights
Reagan-National to Calgary flights
Baltimore to Toronto Island flights
Dulles Intl to Québec City flights
Dulles Intl to Ottawa flights
Baltimore to Halifax flights
Reagan-National to Québec City flights
Reagan-National to Ottawa flights
Dulles Intl to Abbotsford flights
Dulles Intl to Edmonton flights
Baltimore to Edmonton flights
Baltimore to Québec City flights
Baltimore to Ottawa flights
Dulles Intl to Winnipeg flights
Baltimore to Winnipeg flights
Dulles Intl to Hamilton flights
Reagan-National to Edmonton flights
Reagan-National to Toronto Island flights
Dulles Intl to Victoria flights
Reagan-National to Winnipeg flights
Dulles Intl to Charlottetown flights
Baltimore to Charlottetown flights
Baltimore to Victoria flights
Baltimore to Saskatoon flights
Dulles Intl to Kelowna flights
Dulles Intl to London flights
Reagan-National to Victoria flights

Top 3 airlines flying from Dulles Intl to Ontario

Discover the top 3 airlines that operate flights from Dulles Intl 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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 177AverageC$ 479FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 181AverageC$ 482FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 242AverageC$ 526FlexibilityNo cancel feeOn-time52%
Search Porter 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 Dulles Intl to Ontario?

Cheapflights makes it easy to find Dulles Intl to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Ontario?

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

Can Cheapflights find flights from Dulles Intl to Ontario with no change fees?

Yes, we can. To see specific flights from Dulles Intl to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Dulles Intl to Ontario become cheaper?

Not ready to book yet? You can track prices for flights from Dulles Intl to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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