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Cheap flights from Washington, D.C. Dulles Intl Airport to Ontario from C$ 132

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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 292

One-way from

C$ 132

Popular in

August

Cheapest in

June

Average price

C$ 385

Good round-trip deal

C$ 339 or less

Good one-way deal

C$ 149 or less
Porter Airlines
  • Porter Airlines
  • 2/10-5/10
  • Nonstop
  • 3h 04m total
  • Washington, D.C. to Ontario
Search Deals
Air Canada
  • Air Canada
  • 8/11
  • 1 total stop
  • 7h 10m total
  • Washington, D.C. to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Ontario.
Search Deals

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 11 September 2025.

Thu 2/1011:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Sun 5/108:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 10/9C$ 292
Wed 24/92:25 p.m.IAD - YYZ
Nonstop1h 32mAir Canada
Thu 25/98:10 a.m.YYZ - IAD
Nonstop1h 28mAir Canada
Deal found 9/9C$ 292
Thu 4/1211:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Tue 9/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 11/9C$ 294
Thu 30/1011:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Thu 6/118:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 11/9C$ 295
Thu 2/108:59 p.m.IAD - YYZ
1 stop24h 22mMultiple Airlines
Mon 6/107:45 a.m.YYZ - IAD
1 stop7h 54mMultiple Airlines
Deal found 9/9C$ 295
Sun 19/1011:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Fri 31/103:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 10/9C$ 297
Mon 6/1010:20 a.m.IAD - YYZ
Nonstop1h 32mAir Canada
Tue 7/104:30 p.m.YYZ - IAD
1 stop4h 35mAir Canada
Deal found 9/9C$ 297
Sun 12/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Thu 16/108:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 10/9C$ 298
Thu 30/109:52 p.m.IAD - YYZ
1 stop19h 20mMultiple Airlines
Sun 2/112:20 p.m.YYZ - IAD
1 stop7h 49mMultiple Airlines
Deal found 9/9C$ 298
Tue 23/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Fri 26/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Deal found 9/9C$ 299
Wed 29/106:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Sun 2/118:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 11/9C$ 301
Sat 1/114:25 p.m.IAD - YYZ
Nonstop1h 33mAir Canada
Tue 4/116:55 p.m.YYZ - IAD
Nonstop1h 31mAir Canada
Deal found 9/9C$ 301

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 11 September 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

Thu 16/10

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

Nonstop1h 33m

Toronto Island

Sun 19/10

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

Nonstop1h 31m

C$ 294

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 25/10

9:35 a.m.-2:45 p.m.

1 stop5h 10m

Toronto Island

Sat 1/11

3:30 p.m.-8:54 p.m.

1 stop5h 24m

C$ 294

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 4/12

11:40 a.m.-1:10 p.m.

Nonstop1h 30m

Toronto Island

Sun 7/12

3:45 p.m.-5:14 p.m.

Nonstop1h 29m

C$ 294

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 31/10

11:40 a.m.-1:10 p.m.

Nonstop1h 30m

Toronto Island

Mon 3/11

8:55 a.m.-10:24 a.m.

Nonstop1h 29m

C$ 295

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Mon 3/11

11:40 a.m.-1:10 p.m.

Nonstop1h 30m

Toronto Island

Wed 5/11

3:45 p.m.-5:14 p.m.

Nonstop1h 29m

C$ 295

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 30/10

11:40 a.m.-1:10 p.m.

Nonstop1h 30m

Toronto Island

Wed 5/11

3:45 p.m.-5:14 p.m.

Nonstop1h 29m

C$ 295

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sun 19/10

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

Nonstop1h 33m

Toronto Island

Wed 29/10

3:45 p.m.-5:14 p.m.

Nonstop1h 29m

C$ 297

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 15/10

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

Nonstop1h 33m

Toronto Island

Thu 16/10

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

Nonstop1h 31m

C$ 298

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 2/10

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

Nonstop1h 33m

Toronto Island

Sun 5/10

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

Nonstop1h 31m

C$ 305

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 2/10

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

Nonstop1h 33m

Toronto Island

Thu 9/10

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

Nonstop1h 31m

C$ 309

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 60 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$ 168). 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 11 September 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 11 September 2025.

The most flights from IAD to CAON are scheduled on a Wednesday (19 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).

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 11 September 2025.
See what other customers who have flown with Porter Airlines,United Airlines, andAir Canada 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
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,937 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Region of Ontario?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Region of Ontario in 1h 33m. Fly via Porter Airlines, Air Canada, or Delta to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and Region of Ontario is about 546 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 Air Canada, with whom users have recently found tickets for as low as C$ 134. However, be on the lookout for offers from Porter Airlines and Delta, 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 - Montreal Pierre Elliott Trudeau Intl or Washington, D.C. Dulles Intl - Toronto Island 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%), Air Canada (84%), Copa Airlines( 81%).

  • 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$ 390, our data indicates the cheapest price to be C$ 135. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around C$ 309.

  • 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$ 168). 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 Pierre Elliott Trudeau Intl flights
Dulles Intl to Toronto Island flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Dulles Intl to Vancouver Intl flights
Baltimore to Pearson Intl flights
Baltimore to Vancouver Intl flights
Reagan-National to Vancouver Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Dulles Intl to Calgary flights
Dulles Intl to Ottawa flights
Reagan-National to Ottawa flights
Baltimore to Toronto Island flights
Baltimore to Calgary flights
Dulles Intl to Québec City flights
Reagan-National to Calgary flights
Reagan-National to Québec City flights
Dulles Intl to Halifax flights
Baltimore to Québec City flights
Baltimore to Ottawa flights
Dulles Intl to Abbotsford flights
Baltimore to Halifax flights
Dulles Intl to Hamilton flights
Reagan-National to Toronto Island flights
Dulles Intl to Winnipeg flights
Baltimore to Edmonton flights
Dulles Intl to Edmonton flights
Baltimore to Winnipeg flights
Baltimore to Charlottetown flights
Dulles Intl to Charlottetown flights
Dulles Intl to Victoria flights
Reagan-National to Edmonton flights
Dulles Intl to Sault Ste Marie flights
Reagan-National to Winnipeg flights
Baltimore to Victoria flights
Baltimore to Saskatoon flights
Reagan-National to Victoria flights
Dulles Intl to Kelowna flights
Dulles Intl to London flights
Baltimore to Fredericton 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 179AverageC$ 504FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 183AverageC$ 450FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 244AverageC$ 466FlexibilityNo 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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