€382 Cheap Flights London to Washington (LHR-IAD)

View €382 flight on Tue, 25 Nov 2025Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)

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Cheap flights from London to Washington (LHR-IAD)

Prices were available within the past 7 days and start at €382 for one-way flights and €452 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sun, 2 Nov - Tue, 11 Nov
LHR
London
IAD
Washington
€452 Return, found 3 days ago
€452
Return
found 3 days ago
Select Icelandair flight, departing Sun, 2 Nov from London to Washington, returning Tue, 11 Nov, priced at €452 found 3 days ago
Austrian Airlines
Wed, 12 Nov - Sun, 16 Nov
LHR
London
IAD
Washington
€454 Return, found 5 days ago
€454
Return
found 5 days ago
Select Austrian Airlines flight, departing Wed, 12 Nov from London to Washington, returning Sun, 16 Nov, priced at €454 found 5 days ago
Austrian Airlines
Mon, 17 Nov - Thu, 27 Nov
LHR
London
IAD
Washington
€454 Return, found 3 days ago
€454
Return
found 3 days ago
Select Austrian Airlines flight, departing Mon, 17 Nov from London to Washington, returning Thu, 27 Nov, priced at €454 found 3 days ago
Lufthansa
Wed, 12 Nov - Sun, 16 Nov
LHR
London
IAD
Washington
€454 Return, found 5 days ago
€454
Return
found 5 days ago
Select Lufthansa flight, departing Wed, 12 Nov from London to Washington, returning Sun, 16 Nov, priced at €454 found 5 days ago
Brussels Airlines
Mon, 3 Nov - Fri, 14 Nov
LHR
London
IAD
Washington
€463 Return, found 4 days ago
€463
Return
found 4 days ago
Select Brussels Airlines flight, departing Mon, 3 Nov from London to Washington, returning Fri, 14 Nov, priced at €463 found 4 days ago
TAP Portugal
Wed, 12 Nov - Sun, 16 Nov
LHR
London
IAD
Washington
€471 Return, found 5 days ago
€471
Return
found 5 days ago
Select TAP Portugal flight, departing Wed, 12 Nov from London to Washington, returning Sun, 16 Nov, priced at €471 found 5 days ago
United
Mon, 17 Nov - Thu, 27 Nov
LHR
London
IAD
Washington
€501 Return, found 3 days ago
€501
Return
found 3 days ago
Select United flight, departing Mon, 17 Nov from London to Washington, returning Thu, 27 Nov, priced at €501 found 3 days ago
Scandinavian Airlines
Sun, 25 Jan - Sat, 31 Jan
LHR
London
IAD
Washington
€517 Return, found 3 days ago
€517
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Sun, 25 Jan from London to Washington, returning Sat, 31 Jan, priced at €517 found 3 days ago
Finnair
Wed, 12 Nov - Sun, 16 Nov
LHR
London
IAD
Washington
€531 Return, found 5 days ago
€531
Return
found 5 days ago
Select Finnair flight, departing Wed, 12 Nov from London to Washington, returning Sun, 16 Nov, priced at €531 found 5 days ago
Air France
Wed, 12 Nov - Sun, 16 Nov
LHR
London
IAD
Washington
€537 Return, found 5 days ago
€537
Return
found 5 days ago
Select Air France flight, departing Wed, 12 Nov from London to Washington, returning Sun, 16 Nov, priced at €537 found 5 days ago

Find the cheapest month to fly from London (LHR) to Washington (IAD)

November is typically the cheapest month to fly

From €392 - €661 per traveller.

Frequently asked questions

How much is a flight from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey between London Heathrow and Dulles Intl. Airport was €452. Fares this cheap don't wait forever, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from LHR to Dulles Intl. Airport?
This can differ from airline to airline, as each has its own terms and conditions. Visit the Customer Service Portal, where you'll find easy instructions on how to cancel your flight online.
How do I find cheap flights from London Heathrow to IAD that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Heathrow Airport to Dulles Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport (LHR) to Dulles Intl. Airport?
With around 5,900 kilometres separating Heathrow Airport and IAD, your flight will be a long one. Pack wisely to make your time on board comfortable. Simple things like warm clothes and some noise-cancelling headphones can make the biggest difference.
Which airlines fly direct from LHR to Dulles Intl. Airport?
United Airlines (UA) is a popular choice. It offers 60 flights between LHR and Washington Dulles Intl. Airport (IAD) each month. You could also have a look at the airfares with British Airways (BA). This airline operates 60 flights every month between Hounslow and Chantilly.
Are London Heathrow to IAD flight tickets cheaper when they're purchased at the last minute?
Flight prices fluctuate, so not always. While last-minute deals between LHR and Washington Dulles Intl. Airport (IAD) are of course possible, it's also a good idea to keep a close eye on prices well before you fly. In fact, some air carriers publish their prices up to a year ahead of the departure date. Expedia is constantly updating the best bargains around, so check back often and be ready to grab your seat when fare prices drop.

Travel information

Travel information

Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, Air France, British Airways, KLM, Scandinavian Airlines, TAP Portugal, Turkish Airlines
Return price
€451
Distance
5866 km
Average flight time
3 hours 14 mins

Book with confidence

Book with confidence

Perfect flights from London to Washington

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from London to Washington. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of Chantilly, surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Heathrow to Washington Dulles Intl. ticket options cater to your travel preferences, with incredible one-way fares from €382 and roundtrip prices from €452. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Washington Dulles Intl. and explore Chantilly and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your LHR to IAD travel arrangements today and embark on the journey of a lifetime in Washington.
Perfect flights from London to Washington

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