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Dulles Intl

$505+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
sep. 10 — sep. 171
mié. 9/10
mié. 9/17
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or March, booked 75 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap 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 septiembre 5, 2025.

Round-trip from

$531
(Austrian Airlines)

One-way from

$505
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$715

Good round-trip deal

$665 or less

Good one-way deal

$688 or less
From London Heathrow to Washington, D.C. Dulles Intl
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One-way flight from London Heathrow to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 12% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 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 London Heathrow to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from London Heathrow to Washington, D.C. Dulles Intl.
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Find 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 septiembre 5, 2025.

This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/137:25 amLHR - IAD
1 stop12h 40mUnited Airlines
jue. 10/166:40 pmIAD - LHR
Nonstop7h 15mUnited Airlines
Deal found 9/4$531
This TravelUp deal was found by Cheapflights users on 9/4. 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.
lun. 9/1512:35 pmLHR - IAD
Nonstop8h 25mVirgin Atlantic
mié. 10/85:50 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 9/4$532
This TravelUp deal was found by Cheapflights users on 9/4. 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.
vie. 9/1212:35 pmLHR - IAD
Nonstop8h 25mVirgin Atlantic
mar. 9/165:50 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 9/4$533
This United Airlines deal was found by Cheapflights users on 9/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/159:30 amLHR - IAD
1 stop11h 20mUnited Airlines
mar. 10/146:15 amIAD - LHR
1 stop9h 25mUnited Airlines
Deal found 9/4$534
This Brussels Airlines deal was found by Cheapflights users on 9/3. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/276:50 amLHR - IAD
1 stop12h 35mBrussels Airlines
mié. 10/14:00 pmIAD - LHR
1 stop15h 20mBrussels Airlines
Deal found 9/3$535
This FlightHub deal was found by Cheapflights users on 9/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/38:50 amLHR - IAD
1 stop12h 00mAer Lingus
lun. 10/68:25 pmIAD - LHR
1 stop11h 15mAer Lingus
Deal found 9/3$536
This Air Canada deal was found by Cheapflights users on 9/4. 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.
vie. 10/316:50 amLHR - IAD
2 stops18h 09mAir Canada
mié. 11/59:45 amIAD - LHR
1 stop16h 25mAir Canada
Deal found 9/4$537
This Mytrip deal was found by Cheapflights users on 9/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/118:05 pmLHR - IAD
1 stop25h 10mMultiple Airlines
jue. 10/239:45 amIAD - LHR
2 stops17h 10mMultiple Airlines
Deal found 9/3$538
This TravelUp deal was found by Cheapflights users on 9/3. 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.
mar. 9/1612:35 pmLHR - IAD
Nonstop8h 25mVirgin Atlantic
sáb. 9/208:17 pmIAD - LHR
1 stop29h 08mVirgin Atlantic
Deal found 9/3$539
This Air Canada deal was found by Cheapflights users on 9/3. 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.
mié. 9/2410:30 amLHR - IAD
2 stops15h 35mMultiple Airlines
mié. 10/13:36 pmIAD - LHR
2 stops12h 59mMultiple Airlines
Deal found 9/3$540
This Netflights deal was found by Cheapflights users on 9/3. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/117:25 amLHR - IAD
1 stop17h 00mLufthansa
mié. 9/1710:15 pmIAD - LHR
1 stop12h 25mLufthansa
Deal found 9/3$541
This Air Canada deal was found by Cheapflights users on 9/3. 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.
jue. 9/186:50 amLHR - IAD
2 stops14h 28mAir Canada
mié. 10/13:36 pmIAD - LHR
2 stops12h 59mAir Canada
Deal found 9/3$542

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 septiembre 5, 2025.
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

mié. 10/8

3:05 pm-2:35 pm

1 stop28h 30m

Washington, D.C. Dulles Intl

lun. 11/24

5:15 pm-11:15 am

1 stop13h 00m

$531

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 1/10

2:50 pm-2:40 pm

1 stop28h 50m

Washington, D.C. Dulles Intl

sáb. 1/17

1:05 pm-7:10 am

2 stops13h 05m

$531

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 10/6

7:30 pm-2:35 pm

1 stop24h 05m

Washington, D.C. Dulles Intl

lun. 11/24

5:15 pm-11:15 am

1 stop13h 00m

$531

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mié. 12/3

7:25 pm-2:40 pm

1 stop24h 15m

Washington, D.C. Dulles Intl

lun. 12/8

6:20 pm-6:40 am

Nonstop7h 20m

$531

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 9/15

12:35 pm-4:00 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

mié. 10/8

6:00 am-7:15 am

1 stop20h 15m

$532

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

dom. 10/5

9:05 am-2:35 pm

1 stop34h 30m

Washington, D.C. Dulles Intl

dom. 10/12

8:30 am-6:30 am

2 stops17h 00m

$532

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 11/1

5:50 pm-12:19 am

2 stops34h 29m

Washington, D.C. Dulles Intl

jue. 11/27

12:36 pm-7:50 am

2 stops14h 14m

$533

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar. 9/30

12:35 pm-4:00 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

dom. 10/5

5:50 pm-6:20 am

Nonstop7h 30m

$533

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar. 10/7

1:30 pm-8:00 pm

1 stop11h 30m

Washington, D.C. Dulles Intl

jue. 11/27

6:00 am-8:35 pm

1 stop9h 35m

$534

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 10/2

9:30 am-3:50 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

mar. 10/7

1:00 pm-6:30 am

1 stop12h 30m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/4

Showing 1-10 of 22 results
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The best insider tips for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Washington, D.C. Dulles Intl Airport trip
Airlines
British Airways

BA's Club Suite offers private pods with a door, ensuring a more exclusive experience.


World Traveller Plus provides extra seat width and legroom, ideal for long-haul comfort.

Read more about British Airwaysby Gabriel Leigh
United Airlines

Polaris offers lie-flat seats with noise-reducing headphones and large entertainment screens for comfort.


United's Premium Plus seats provide extra legroom, upgraded meals, and two checked bags on international flights.

Read more about United Airlinesby Harriet Baskas
Airports
LHR

Expect long security lines at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

Read more about LHRby Ramsey Qubein
IAD

Use the Silver Line Metro to reach downtown D.C. from IAD in under 40 minutes, a cost-effective transportation option.

Read more about IADby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

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.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

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.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

Ramsey Qubein

Ramsey Qubein

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.

Read more

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 August 29, 2025.

The best time to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 75 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $296). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 septiembre 5, 2025.

When flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 16% versus a flight at noon.

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

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 septiembre 5, 2025.
See what other customers who have flown with Delta, United Airlines, and Virgin Atlantic 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.
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,939 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Virgin Atlantic
7.4
Good
663 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Lufthansa
6.8
Okay
7,390 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
British Airways
6.7
Okay
7,345 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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 25m. Austrian Airlines provides one of the quickest options available for as low as $532. 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?

    Delta, at $320, 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 Scandinavian Airlines and Austrian Airlines. These flights start at 59% lower than the current average price 3 months from now.

  • 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 KLM (85%), Air France (85%) or Delta (85%) 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 $2,992 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $632 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at $433.

  • 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $296). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Towson
Falls Church
Manassas
Rockville
Oxon Hill
Laurel
Dundalk
National Harbor
Waldorf
Hanover

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 septiembre 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$926FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$390Average$833FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$431Average$984FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$714FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$510Average$676FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$595Average$837FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$619Average$684FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$632Average$846FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$652Average$802FlexibilityNo cancel feeOn-timeN/A

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