Dulles Intl

$521+ Cheap flights from Heathrow (LHR) to Dulles Intl (IAD)

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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
Feb 20 — Feb 271
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in September or February, booked 69 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This TravelUp deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am
LHR
-
IAD
1 stop15h 45m
Multiple Airlines
Wed 11/46:20 pm
IAD
-
LHR
Nonstop7h 20m
Multiple Airlines
Deal found 1/21$547
This Air Canada deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/29:00 am
LHR
-
IAD
2 stops16h 54m
Air Canada
Mon 2/99:00 am
IAD
-
LHR
2 stops17h 10m
Air Canada
Deal found 1/20$548
This Air Canada deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/59:00 am
LHR
-
IAD
2 stops17h 21m
Air Canada
Sun 3/89:00 am
IAD
-
LHR
1 stop17h 30m
Air Canada
Deal found 1/20$549
This Expedia deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/54:20 pm
LHR
-
IAD
Nonstop8h 55m
Multiple Airlines
Tue 3/1011:15 pm
IAD
-
LHR
Nonstop7h 35m
Multiple Airlines
Deal found 1/20$551
This Austrian Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:00 am
LHR
-
IAD
1 stop13h 35m
Austrian Airlines
Tue 4/2810:10 pm
IAD
-
LHR
Nonstop7h 30m
Austrian Airlines
Deal found 1/20$552
This Air Canada deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/109:00 am
LHR
-
IAD
2 stops17h 25m
Air Canada
Wed 2/189:45 am
IAD
-
LHR
2 stops15h 45m
Air Canada
Deal found 1/20$553
This Air Canada deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/109:00 am
LHR
-
IAD
2 stops16h 29m
Air Canada
Tue 2/171:13 pm
IAD
-
LHR
2 stops14h 17m
Air Canada
Deal found 1/21$554
This Expedia deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1212:05 pm
LHR
-
IAD
Nonstop8h 30m
Lufthansa
Wed 2/186:20 pm
IAD
-
LHR
Nonstop7h 20m
Lufthansa
Deal found 1/21$555
This Austrian Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/237:25 pm
LHR
-
IAD
1 stop24h 15m
Austrian Airlines
Wed 4/110:10 pm
IAD
-
LHR
Nonstop7h 30m
Austrian Airlines
Deal found 1/21$556
This British Airways deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/108:50 am
LHR
-
IAD
1 stop11h 45m
British Airways
Tue 2/176:20 pm
IAD
-
LHR
Nonstop7h 10m
British Airways
Deal found 1/20$557
This The Travel House deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:00 am
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Sat 3/710:15 pm
IAD
-
LHR
Nonstop7h 35m
Austrian Airlines
Deal found 1/21$558

Find flight deals from Heathrow to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 January 21, 2026.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$548
(Air Canada)

One-way from

$521
(Trip.com)

Popular in

July

Cheapest in

September

Average price

$698

Good round-trip deal

$572 or less

Good one-way deal

$752 or less
Provider with most accurate pricing for London Heathrow-Washington, D.C. Dulles Intl flight deals.
Provider most trusted by Cheapflights users for London Heathrow-Washington, D.C. Dulles Intl flights.
From London Heathrow to Washington, D.C. Dulles Intl
One-way flight from London Heathrow to Washington, D.C. Dulles Intl
Highest demand for flights based on searches. 13% potential increase in price ($115 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Average for round-trip flights in January 2026
Price to beat on a round-trip flight from London Heathrow to Washington, D.C. Dulles Intl.
Price to beat on a one-way flight from London Heathrow to Washington, D.C. Dulles Intl.

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow 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 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Heathrow

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 2/18

8:50 am-3:35 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Sat 2/28

6:20 pm-6:30 am

Nonstop7h 10m

$557

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 5/16

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 5/21

8:30 pm-11:55 am

1 stop10h 25m

$565

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 2/14

4:20 pm-8:15 pm

Nonstop8h 55m

Washington, D.C. Dulles Intl

Mon 2/23

6:20 pm-6:40 am

Nonstop7h 20m

$570

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 2/15

12:05 pm-3:35 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

Thu 2/26

6:20 pm-6:40 am

Nonstop7h 20m

$570

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 5/31

9:50 am-3:45 pm

1 stop10h 55m

Washington, D.C. Dulles Intl

Sat 6/6

10:25 pm-10:50 am

Nonstop7h 25m

$585

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 5/14

12:35 pm-3:50 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Fri 5/22

5:40 pm-6:20 am

Nonstop7h 40m

$609

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 5/14

2:00 pm-5:25 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

Wed 5/20

7:15 pm-7:45 am

Nonstop7h 30m

$609

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 5/25

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Fri 6/5

5:35 pm-9:35 pm

1 stop23h 00m

$613

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 3/6

6:50 am-4:25 pm

2 stops14h 35m

Washington, D.C. Dulles Intl

Fri 3/13

6:15 pm-9:45 am

1 stop11h 30m

$621

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 4/11

8:45 am-4:45 pm

1 stop13h 00m

$528

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 21 results
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Compare providers for flights from Heathrow to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Dulles Intl in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust Gotogate the most. Gotogate has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Dulles Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Dulles Intl. Price data was last updated on January 16, 2026.

The best time to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $511). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $652). 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 LHR to IAD?

Find hourly flight availability from Heathrow 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 January 21, 2026.

When flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The best insider tips for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Washington, D.C. Dulles Intl Airport trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

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 January 21, 2026.
See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from London Heathrow Airport 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.

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

    A quick flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport can take about 8h 55m. British Airways provides one of the quickest options available for as low as $570. The distance from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is about 3664 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Scandinavian Airlines, at $271, was found to be the cheapest airline from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Delta and Austrian Airlines. These flights start at 63% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $466 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $481 and Virgin Atlantic from $485 one-way.

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

    No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport consider choosing Air Canada (83%), Austrian Airlines (83%) or Copa Airlines (83%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $1,318 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $539 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at $441.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $511). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $652). 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

Traveling 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
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Hanover
Herndon
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

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Top 10 airlines flying from Heathrow to Dulles Intl

Discover the top 10 airlines that operate flights from Heathrow 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 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$271Average$833FlexibilityNo cancel feeOn-time77%
DeltaCheapest$320Average$926FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$431Average$984FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$730FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$485Average$720FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$559Average$711FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$567Average$808FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$567Average$803FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$572Average$772FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%

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