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Cheap flights from Toronto to Washington, D.C. Dulles Intl Airport from C$ 173

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 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — IAD
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Toronto to Washington, D.C. Dulles Intl are usually found in July or June, booked 41 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Toronto to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Toronto (YTO) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 September 2025.

Round-trip from

C$ 254

One-way from

C$ 173

Popular in

October

Cheapest in

July

Average price

C$ 395

Good round-trip deal

C$ 258 or less

Good one-way deal

C$ 153 or less
Porter Airlines
  • Porter Airlines
  • 18/10-19/10
  • Nonstop
  • 3h 04m total
  • Toronto to Washington, D.C.
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Porter Airlines
  • Porter Airlines
  • 29/9
  • Nonstop
  • 1h 31m total
  • Toronto to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 141 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 27 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Toronto (YTO) to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Toronto (YTO) to Washington, D.C. Dulles Intl.
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Find flight deals from Toronto to Dulles Intl

Cheapest flights from Toronto to Dulles Intl
Explore the most affordable flight options available from Toronto to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Sat 18/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 19/1011:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 14/9C$ 254
Thu 9/108:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 12/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 16/9C$ 256
Thu 16/108:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 19/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 15/9C$ 261
Thu 27/118:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Wed 3/1211:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 15/9C$ 264
Wed 15/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Wed 22/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 15/9C$ 266
Thu 13/113:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Sun 16/1111:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 16/9C$ 267
Fri 17/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 2/1111:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 15/9C$ 268
Tue 28/103:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Tue 11/116:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 17/9C$ 274
Thu 6/113:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Tue 18/116:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 15/9C$ 275
Tue 7/1012:10 p.m.YYZ - IAD
Nonstop1h 28mAir Canada
Wed 8/1010:20 a.m.IAD - YYZ
Nonstop1h 32mAir Canada
Deal found 15/9C$ 279
Sat 6/124:00 p.m.YYZ - IAD
1 stop4h 59mAir Canada
Sun 7/124:30 p.m.IAD - YYZ
Nonstop1h 33mAir Canada
Deal found 15/9C$ 286
Tue 7/108:10 a.m.YYZ - IAD
Nonstop1h 28mAir Canada
Sun 23/119:00 a.m.IAD - YYZ
Nonstop1h 29mAir Canada
Deal found 16/9C$ 289

Cheapflights Fare Finder

 
Customize your flight search to find flights from Toronto to Dulles Intl 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 17 September 2025.
Use the filters below to find and compare flights from Toronto to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Toronto

Fly to

Dulles Intl

Route

Depart

Return

Price

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 13/11

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sun 16/11

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

Nonstop1h 30m

C$ 267

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 17/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 21/10

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

Nonstop1h 33m

C$ 267

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 9/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sat 11/10

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

Nonstop1h 33m

C$ 268

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 12/11

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Tue 18/11

6:30 p.m.-8:00 p.m.

Nonstop1h 30m

C$ 275

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 11/11

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Thu 13/11

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

Nonstop1h 30m

C$ 278

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 4/11

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Thu 4/12

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

Nonstop1h 30m

C$ 279

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 8/11

11:00 a.m.-12:29 p.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Tue 11/11

6:30 p.m.-8:00 p.m.

Nonstop1h 30m

C$ 286

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 25/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Sat 1/11

1:45 p.m.-3:15 p.m.

Nonstop1h 30m

C$ 286

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Mon 27/10

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sat 8/11

1:45 p.m.-3:15 p.m.

Nonstop1h 30m

C$ 290

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 28/10

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sat 8/11

1:45 p.m.-3:15 p.m.

Nonstop1h 30m

C$ 290

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 41 results
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Best time to book a flight from Toronto to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Toronto 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 Toronto to Washington, D.C. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Toronto to Dulles Intl. Price data was last updated on 12 September 2025.

To ensure you get the cheapest price possible for a flight from Toronto to Washington, D.C. Dulles Intl Airport, you should look to book at least 41 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Toronto to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from Toronto to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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 YTO to IAD?

Find hourly flight availability from Toronto to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.

A simple way to save on the total cost of your ticket is to fly from Toronto to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Toronto to Dulles Intl. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Toronto to Washington, D.C. Dulles Intl Airport flight should consider departing on Saturday afternoons 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 Toronto to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Toronto to Dulles Intl. 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 17 September 2025.

The most flights from YTO to IAD are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

What’s the top layover airport for flights from Toronto to Washington, D.C. Dulles Intl Airport?

Share of one-stop round-trip flights from Toronto to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Detroit (DTW) – chosen by Cheapflights users on 50% of one-stop itineraries from Toronto to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Toronto to Washington, D.C. Dulles Intl Airport?

Average round-trip fare for 1-stop flights from Toronto to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Montreal (YUL) is the most affordable 1-stop option, with an average round-trip price of C$ 357.

What’s the fastest layover option from Toronto to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for 1-stop one-way flights from Toronto to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 4h 47m.

Which airport typically offers the quickest layover for flights from Toronto to Washington, D.C. Dulles Intl Airport?

Average layover duration for 1-stop one-way flights from Toronto to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Montreal (YUL) offer the fastest connection on this route, with an average layover time of 1h 52m.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated 17 September 2025.
See what other customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from Toronto to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
365 reviews
Check prices

Boarding

8.2

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

7.0

Food

7.6

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
365 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Boarding

8.2

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

7.0

Food

7.6

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 Transat
7.7
Good
439 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Boarding

8.2

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

7.0

Food

7.6

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
8,926 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Boarding

8.2

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

7.0

Food

7.6

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.
WestJet
7.2
Good
3,095 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Boarding

8.2

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

7.0

Food

7.6

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
365 reviews
Check prices

Boarding

8.2

Overall

7.9

Comfort

7.9

Crew

8.6

Entertainment

7.0

Food

7.6

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 Toronto to Dulles Intl. 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 Toronto to Washington, D.C. Dulles Intl Airport?

    Airlines like Porter Airlines and United Airlines fly from Toronto to Washington, D.C. Dulles Intl Airport in about 1h 29m. The time it takes to get you to your destination is usually consistent. The distance from Toronto to Washington, D.C. Dulles Intl Airport is about 546 km. All flights are typically direct.

  • What are the cheapest airlines flying from Toronto to Washington, D.C. Dulles Intl Airport round-trip?

    Air Transat, at C$ 203, was found to be the cheapest airline from Toronto to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Porter Airlines and Air Canada. Air Transat is 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Toronto to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airlines for a one-way flight from Toronto to Washington, D.C. Dulles Intl Airport are Porter Airlines (C$ 173), Air Transat (C$ 179), and United Airlines (C$ 186).

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

    Before booking your flight to Washington, D.C. Dulles Intl Airport from Toronto, check out the most reliable airlines to get you to your destination on time: Republic Airways (90%), Copa Airlines (86%), Air Canada( 85%).

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

    On average you can expect to pay C$ 1,089 for a flight from Toronto to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is C$ 235 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at C$ 296.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Toronto to Dulles Intl 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 Toronto to Washington, D.C. Dulles Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Toronto to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from Toronto to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Herndon
Warrenton
Hanover
Reston
Fairfax
Ellicott City
Oxon Hill
Gaithersburg
Winchester
Arlington
Alexandria
Manassas
Fredericksburg
Rockville

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Fly from Toronto to Dulles Intl on these airlines

Choose from the following airlines for your flight from Toronto to Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on 17 September 2025.
Porter Airlines flights from Toronto to Washington, D.C. Dulles Intl
Air Canada flights from Toronto to Washington, D.C. Dulles Intl
United Airlines flights from Toronto to Washington, D.C. Dulles Intl

Top 5 airlines flying from Toronto to Dulles Intl

Discover the top 5 airlines that operate flights from Toronto to Dulles Intl. 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 203AverageC$ 349FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 212AverageC$ 300FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 262AverageC$ 396FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 268AverageC$ 426FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 429AverageC$ 606FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Toronto to Dulles Intl?

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Toronto.

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

Yes, we can. To see specific flights from Toronto to Dulles Intl 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 Toronto to Dulles Intl become cheaper?

Of course! You can now track prices for flights from Toronto to Dulles Intl 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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