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Cheap flights from Washington, D.C. Dulles Intl Airport to Ontario from C$ 133

IAD — YYZ
11 Oct — 18 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Ontario

Mon 23/1111:20 a.m. -
Nonstop1h 32m
Mon 30/114:15 p.m. -
Nonstop1h 28m
Deal found 10/9C$ 268
Tue 24/1111:20 a.m. -
Nonstop1h 32m
Sat 28/119:10 a.m. -
Nonstop1h 28m
Deal found 10/9C$ 269
Sat 24/1011:25 a.m. -
Nonstop1h 30m
Sat 31/109:10 a.m. -
Nonstop1h 28m
Deal found 6/9C$ 271
Tue 1/129:55 a.m. -
Nonstop1h 27m
Sat 5/126:40 p.m. -
Nonstop1h 30m
Deal found 9/9C$ 271
Fri 25/93:50 p.m. -
Nonstop1h 30m
Sun 27/99:15 a.m. -
Nonstop1h 30m
Deal found 5/9C$ 272
Fri 27/116:25 p.m. -
Nonstop1h 34m
Tue 1/129:10 a.m. -
Nonstop1h 28m
Deal found 10/9C$ 274
Wed 25/1111:20 a.m. -
Nonstop1h 32m
Thu 26/119:10 a.m. -
Nonstop1h 28m
Deal found 10/9C$ 275
Mon 28/99:55 a.m. -
Nonstop1h 25m
Fri 2/101:00 p.m. -
1 stop6h 00m
Deal found 6/9C$ 275
Thu 24/911:25 a.m. -
Nonstop1h 30m
Tue 29/99:15 a.m. -
Nonstop1h 30m
Deal found 10/9C$ 276
Sat 24/109:55 a.m. -
Nonstop1h 25m
Tue 27/102:15 p.m. -
Nonstop1h 30m
Deal found 9/9C$ 276
Thu 24/911:25 a.m. -
Nonstop1h 30m
Mon 28/99:15 a.m. -
Nonstop1h 30m
Deal found 10/9C$ 278
Thu 22/109:55 a.m. -
Nonstop1h 25m
Mon 26/106:40 p.m. -
Nonstop1h 30m
Deal found 6/9C$ 278

Find flight deals from Dulles Intl to Ontario

Round-trip from

C$ 268

One-way from

C$ 133

Popular in

May

Cheapest in

January

Average price

C$ 395

Good round-trip deal

C$ 258 or less

Good one-way deal

C$ 150 or less
Porter Airlines
  • Porter Airlines
  • 23/11-30/11
  • Nonstop
  • 3h 00m total
  • Washington, D.C. to Ontario
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Delta
  • Delta
  • 11/12-31/12
  • 1 total stop
  • 5h 53m total
  • Washington, D.C. to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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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.
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Cheapflights Fare Finder

 
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Fri 11/12

6:00 a.m.-1:35 p.m.

1 stop7h 35m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 133

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Tue 24/11

6:00 a.m.-1:30 p.m.

1 stop7h 30m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 133

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Tue 6/10

6:05 a.m.-11:19 a.m.

1 stop5h 14m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 140

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Thu 24/9

6:10 a.m.-1:34 p.m.

1 stop7h 24m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 140

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Thu 22/10

6:05 a.m.-1:36 p.m.

1 stop7h 31m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 140

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YTZ Toronto Island

IADYTZ

Washington, D.C. Dulles Intl

Tue 22/9

9:45 a.m.-2:20 p.m.

1 stop4h 35m

Toronto Island

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 145

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Fri 25/9

11:10 a.m.-3:15 p.m.

1 stop4h 05m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 145

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Fri 30/10

6:05 a.m.-1:36 p.m.

1 stop7h 31m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 145

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Fri 13/11

6:00 a.m.-1:30 p.m.

1 stop7h 30m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 145

Washington, D.C.Toronto

IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl

IADYYZ

Washington, D.C. Dulles Intl

Sat 26/9

5:15 p.m.-10:59 p.m.

1 stop5h 44m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 146

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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$ 439). Flying from Washington, D.C. Dulles Intl Airport to Region of Ontario in February is currently the most expensive (average of C$ 557). 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?

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Region of Ontario at noon. Doing so could potentially save you 36% on the flight price compared to flying in the evening, which is usually more expensive.

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

The most flights from IAD to CAON are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Region of Ontario?

Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to Region of Ontario flights typically cost between C$ 387 and C$ 638 in December.
The cheapest round-trip price found within the last 5 days was C$ 271 on Air Canada (1 Dec-5 Dec).

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario?

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 78 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Region of Ontario?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Region of Ontario flight should consider departing on Thursday at noon when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

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
8.0
Very good
460 reviews
Check prices

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
460 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,197 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,611 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

  • 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 32m. Fly via Porter Airlines, Delta, or Air Canada 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 Porter Airlines, with whom users have recently found tickets for as low as C$ 111. However, be on the lookout for offers from United Airlines and Air Canada, 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 - Montreal Pierre Elliott Trudeau Intl, Washington, D.C. Dulles Intl - Toronto Pearson 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 (80%), Air Canada (71%), Copa Airlines( 70%).

  • 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$ 352, our data indicates the cheapest price to be C$ 133. The most popular route (Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl), is priced around C$ 416.

  • 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$ 439). Flying from Washington, D.C. Dulles Intl Airport to Region of Ontario in February is currently the most expensive (average of C$ 557). 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

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Dulles Intl to Ontario

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 176AverageC$ 710FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 282AverageC$ 406FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 297AverageC$ 509FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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.

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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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