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Cheap flights from Toronto to Washington, D.C. Dulles Intl Airport from C$ 177

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — IAD
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Toronto to Washington, D.C. Dulles Intl are usually found in July or June, booked 35 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Toronto to Dulles Intl

Enter your travel dates to find the best prices.

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 4 December 2025.

Tue 30/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Mon 5/16:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 2/12C$ 274
Thu 18/123:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Mon 29/126:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 2/12C$ 289
Fri 19/123:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Fri 2/16:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 3/12C$ 290
Fri 19/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Wed 31/1211:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 1/12C$ 292
Thu 18/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Sun 21/126:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 4/12C$ 294
Tue 23/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Tue 30/126:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 2/12C$ 297
Fri 26/123:45 p.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Thu 8/111:35 a.m.IAD - YTZ
Nonstop1h 34mPorter Airlines
Deal found 4/12C$ 299
Wed 24/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Wed 31/1211:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 2/12C$ 300
Mon 22/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Wed 31/1211:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 2/12C$ 301
Sat 20/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Thu 25/122:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 4/12C$ 303
Wed 17/128:55 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Sun 21/126:30 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 3/12C$ 304
Thu 25/124:10 p.m.YYZ - IAD
1 stop5h 15mAir Canada
Wed 31/125:10 p.m.IAD - YYZ
1 stop4h 35mAir Canada
Deal found 4/12C$ 308

Find 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 4 December 2025.

Round-trip from

C$ 274

One-way from

C$ 177

Popular in

November

Cheapest in

July

Average price

C$ 368

Good round-trip deal

C$ 275 or less

Good one-way deal

C$ 175 or less
Porter Airlines
  • Porter Airlines
  • 30/12-5/1
  • Nonstop
  • 2h 59m total
  • Toronto to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 9/1
  • Nonstop
  • 1h 29m total
  • Toronto to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 107 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Toronto (YTO) to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Toronto (YTO) to Washington, D.C. Dulles Intl.
Search Deals

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 4 December 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

Mon 19/1

8:50 a.m.-10:19 a.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 26/1

11:35 a.m.-1:09 p.m.

Nonstop1h 34m

C$ 280

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 18/2

8:50 a.m.-10:22 a.m.

Nonstop1h 32m

Washington, D.C. Dulles Intl

Thu 19/2

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

Nonstop1h 30m

C$ 283

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 20/2

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sun 22/2

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

Nonstop1h 30m

C$ 283

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Thu 19/2

8:50 a.m.-10:22 a.m.

Nonstop1h 32m

Washington, D.C. Dulles Intl

Fri 20/2

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

Nonstop1h 30m

C$ 283

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 20/3

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sun 22/3

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

Nonstop1h 30m

C$ 294

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 20/12

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Thu 25/12

2:30 p.m.-4:00 p.m.

Nonstop1h 30m

C$ 303

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sun 18/1

10:00 a.m.-11:48 a.m.

Nonstop1h 48m

Washington, D.C. Dulles Intl

Mon 19/1

12:35 p.m.-2:14 p.m.

Nonstop1h 39m

C$ 304

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 31/12

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 5/1

11:35 a.m.-1:09 p.m.

Nonstop1h 34m

C$ 306

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 23/12

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

Nonstop1h 29m

Washington, D.C. Dulles Intl

Mon 29/12

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

Nonstop1h 30m

C$ 313

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sun 18/1

6:00 a.m.-11:49 a.m.

1 stop5h 49m

Washington, D.C. Dulles Intl

Sun 25/1

6:00 a.m.-11:20 a.m.

1 stop5h 20m

C$ 314

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 42 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 28 November 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 35 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$ 183). Flying from Toronto to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of C$ 255). 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 4 December 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 morning. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the afternoon.

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 Tuesday evenings when fares are most often at their lowest. Sunday afternoons 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 4 December 2025.

The most flights from YTO to IAD 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 (15 on average).

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

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 67% 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$ 362.

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 Ottawa (YOW) have the shortest average one-way travel time for 1-stop routes: 3h 52m.

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 Ottawa (YOW) offer the fastest connection on this route, with an average layover time of 1h 11m.

How often are flights from Toronto to Washington, D.C. delayed?

About 12% of weekly flights between Toronto and Washington, D.C. have experienced delays in the past year, with the average delay time being 116 minutes.

What is the most punctual flight time for Toronto to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Toronto to Washington, D.C. flights?

Over the past year, United Airlines has had the lowest number of delays on this route, with just 9% of flights being delayed.

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 4 December 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
8.0
Very good
395 reviews
Check prices

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
395 reviews
Porter Airlines
8.0
Very good
395 reviews
Check prices

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Transat
7.8
Good
480 reviews
Porter Airlines
8.0
Very good
395 reviews
Check prices

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,066 reviews
Porter Airlines
8.0
Very good
395 reviews
Check prices

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,500 reviews
Porter Airlines
8.0
Very good
395 reviews
Check prices

Comfort

8.0

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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, United Airlines, and Delta fly from Toronto to Washington, D.C. Dulles Intl Airport in about 1h 32m. The time it takes to get you to your destination can typically vary by up to 4h 17m. The distance from Toronto to Washington, D.C. Dulles Intl Airport is about 546 km. This flight may include one or multiple stops.

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

    Air Transat, at C$ 212, 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 38% 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$ 136), Air Transat (C$ 147), and Air Canada (C$ 181).

  • 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: United Airlines (84%), Jazz (83%), Air Canada( 83%).

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

    On average you can expect to pay C$ 928 for a flight from Toronto to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is C$ 191 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at C$ 286.

  • 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$ 183). Flying from Toronto to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of C$ 255). 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
Silver Spring
Warrenton
Winchester
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Herndon
Arlington
Manassas
Fredericksburg
Alexandria
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 4 December 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 4 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 212AverageC$ 415FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 214AverageC$ 293FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 264AverageC$ 413FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 272AverageC$ 412FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 416AverageC$ 579FlexibilityNo 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?

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 Dulles Intl from Toronto today with Cheapflights!

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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