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C$ 166+ Cheap flights to Dulles Intl

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
25 Aug — 1 Sep1
1 adult

Flights to Dulles Intl in 2025

Find the latest flights to Dulles Intl in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 20 August 2025.

Round-trip from

C$ 257

One-way from

C$ 166

Popular in

June

Cheapest in

April

Average price

C$ 350

Good round-trip deal

C$ 259 or less

Good one-way deal

C$ 156 or less
Porter Airlines
  • Porter Airlines
  • 10/10-28/10
  • Nonstop
  • 3h 01m total
  • Toronto to Washington, D.C.
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Porter Airlines
  • Porter Airlines
  • 6/9
  • Nonstop
  • 1h 31m total
  • Toronto to Washington, D.C.
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. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Toronto to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Toronto to Washington, D.C. Dulles Intl.
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Find flight deals to Dulles Intl Airport

Cheapest flights to Dulles Intl Airport
Explore the most affordable flight options available to Dulles Intl Airport. Find the lowest fares based on data from user searches, with prices last updated on 20 August 2025.

Fri 10/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Tue 28/106:35 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 18/8C$ 257
Sat 20/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Tue 23/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 20/8C$ 259
Thu 11/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 14/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 19/8C$ 261
Tue 9/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Tue 23/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 18/8C$ 266
Sun 14/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Wed 17/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 18/8C$ 267
Sun 21/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 21/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 18/8C$ 268
Fri 5/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Mon 8/911:35 a.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 18/8C$ 270
Wed 10/91:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Tue 30/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 19/8C$ 271
Sun 19/108:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sun 26/1011:40 a.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Deal found 19/8C$ 275
Fri 17/101:35 p.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sat 25/104:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 19/8C$ 279
Thu 25/98:45 a.m.YTZ - IAD
Nonstop1h 31mPorter Airlines
Sat 27/94:20 p.m.IAD - YTZ
Nonstop1h 33mPorter Airlines
Deal found 18/8C$ 281
Tue 7/108:10 a.m.YYZ - IAD
Nonstop1h 28mAir Canada
Wed 8/102:25 p.m.IAD - YYZ
Nonstop1h 32mAir Canada
Deal found 19/8C$ 281

Cheapflights Fare Finder

 
Locate flights to Dulles Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 20 August 2025.
Use the filters below to find and compare flights to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Toronto

Route

Depart

Return

Price

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 28/9

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 30/9

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

Nonstop1h 33m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 10/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 28/10

6:35 p.m.-8:05 p.m.

Nonstop1h 30m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 5/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Wed 8/10

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

Nonstop1h 33m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 7/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 14/10

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

Nonstop1h 33m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 28/10

9:00 a.m.-10:29 a.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Tue 28/10

6:35 p.m.-8:05 p.m.

Nonstop1h 30m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Tue 28/10

9:00 a.m.-10:29 a.m.

Nonstop1h 29m

Washington, D.C. Dulles Intl

Thu 30/10

6:35 p.m.-8:05 p.m.

Nonstop1h 30m

C$ 257

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

Mon 13/10

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

Nonstop1h 33m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Wed 17/9

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Wed 24/9

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

Nonstop1h 33m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 10/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Tue 14/10

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

Nonstop1h 33m

C$ 257

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Fri 10/10

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

Nonstop1h 31m

Washington, D.C. Dulles Intl

Mon 13/10

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

Nonstop1h 33m

C$ 257

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/8

Showing 1-10 of 38 results
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Best time to book a flight to Dulles Intl

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

When is the best time to book a flight to Dulles Intl?

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 8 August 2025.

To ensure you get the cheapest price possible for a flight to Dulles Intl, 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.

How long is the flight to Dulles Intl?

On average, a flight from Toronto to Dulles Intl takes 1 hour 27 minutes. Flights to Dulles Intl from other popular cities in Canada will vary in length. Below are a few examples of popular routes and their flight times.

When is the cheapest time to fly to Dulles Intl?

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.

Users looking for the lowest fares to Dulles Intl should consider flying on Tuesday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday afternoons, when prices are usually at their highest.

Weekly flight availability to Dulles Intl

The most flights from Toronto to Dulles Intl are scheduled on a Monday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

What are the most popular airlines that fly to Dulles Intl?

The most popular airlines flying from Toronto to Dulles Intl are Air Canada, Porter Airlines and United Airlines.

Air Canada
Air Canada
From C$ 185
Porter Airlines
Porter Airlines
From C$ 154
United Airlines
United Airlines
From C$ 201
WestJet
WestJet
From C$ 141

What are the cheapest airlines that fly to Dulles Intl?

The cheapest airlines flying from Toronto to Dulles Intl are Air Transat, Porter Airlines and Air Canada.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Dulles Intl ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Dulles Intl when rainfall is around 66.0 mm.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Dulles Intl, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 20 August 2025.
Check out reviews from past customers who have flown Porter Airlines,Air Transat, andUnited Airlines to the United States to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
339 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Crew

8.7

Food

7.6

Boarding

8.2

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
339 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Crew

8.7

Food

7.6

Boarding

8.2

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
430 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Crew

8.7

Food

7.6

Boarding

8.2

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
8,928 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Crew

8.7

Food

7.6

Boarding

8.2

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
3,032 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Crew

8.7

Food

7.6

Boarding

8.2

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 Canada
7.1
Good
10,000 reviews
Porter Airlines
8.0
Very good
339 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Crew

8.7

Food

7.6

Boarding

8.2

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

FAQs about flying to Dulles Intl

Washington Dulles International Airport (IAD) handles close to 24 million passengers each year. This architecturally beautiful airport is situated 26 miles (42km) from downtown Washington DC and serves a metropolitan area that includes Washington, Baltimore and Northern Virginia.

Washington Dulles International Airport was named after John Foster Dulles who was a former US Secretary of State. The airport is well-connected to Washington and Virginia, and is also connected to more than 125 destinations around the world, making it a popular gateway to the eastern United States.

The airport has a range of shopping options including book shops, fashion, jewellery, gifts, gadgets and music. The duty-free shops at the Washington Dulles International Airport are well-stocked and the amenities are top-class.

The airport serves as a hub for United Airlines, however passengers can book flights to Washington Dulles International Airport on most major international and domestic airlines.

  • Can I find cheaper flights to Dulles Intl if I am willing to have layovers?

    Yes, flights with layovers are often cheaper than direct flights. Keep an eye out for flight deals to Dulles Intl on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Dulles Intl?

    Based on reviews from Cheapflights users, American Airlines is rated the highest out of the airlines that fly to Dulles Intl.

  • What is the cheapest airport to fly to in Dulles Intl?

    Washington, D.C. Dulles Intl is currently the cheapest airport to fly to in Dulles Intl. One-way flights to Washington, D.C. Dulles Intl typically cost C$ 44, while round-trip flights cost around C$ 87.

  • How much is a round-trip flight to Dulles Intl?

    A round-trip flight to Dulles Intl will typically cost around C$ 63, however they can be found for as little as C$ 63.

  • Where does the fastest flight to Dulles Intl depart from?

    For those looking to save time traveling to Dulles Intl, Toronto offers the quickest one-way flight (1 hour 25 minutes).

  • Does Washington, D.C. Dulles Intl have rental cars?

    Yes. Those touching down at Washington, D.C. Dulles Intl can take advantage of the rental car services offered upon their arrival.

  • Are there hotels close to Washington, D.C. Dulles Intl?

    Yes. Washington, D.C. Dulles Intl has hotels nearby for those requiring accommodations. Sleepbox Lounge Iad, Dulles International Airport is the closest property to Washington, D.C. Dulles Intl (0.0 km away from Washington, D.C. Dulles Intl).

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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Certainly. Search results for flights to Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Of course! You can track prices for flights 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 to set up your price alerts.

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