€461 Cheap Flights London to Washington (LHR-IAD)

View €461 flight on Tue, 17 Mar 2026Opens 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 €461 for one-way flights and €458 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Austrian Airlines
Thu, 12 Mar - Tue, 17 Mar
LHR
London
IAD
Washington
€458 Return, found 6 days ago
€458
Return
found 6 days ago
Select Austrian Airlines flight, departing Thu, 12 Mar from London to Washington, returning Tue, 17 Mar, priced at €458 found 6 days ago
TAP Portugal
Thu, 12 Mar - Tue, 17 Mar
LHR
London
IAD
Washington
€458 Return, found 6 days ago
€458
Return
found 6 days ago
Select TAP Portugal flight, departing Thu, 12 Mar from London to Washington, returning Tue, 17 Mar, priced at €458 found 6 days ago
Swiss International Air Lines
Thu, 15 Jan - Wed, 21 Jan
LHR
London
IAD
Washington
€459 Return, found 6 hours ago
€459
Return
found 6 hours ago
Select Swiss International Air Lines flight, departing Thu, 15 Jan from London to Washington, returning Wed, 21 Jan, priced at €459 found 6 hours ago
Brussels Airlines
Tue, 24 Feb - Wed, 4 Mar
LHR
London
IAD
Washington
€469 Return, found 6 days ago
€469
Return
found 6 days ago
Select Brussels Airlines flight, departing Tue, 24 Feb from London to Washington, returning Wed, 4 Mar, priced at €469 found 6 days ago
British Airways
Wed, 28 Jan - Wed, 4 Feb
LHR
London
IAD
Washington
€476 Return, found 2 days ago
€476
Return
found 2 days ago
Select British Airways flight, departing Wed, 28 Jan from London to Washington, returning Wed, 4 Feb, priced at €476 found 2 days ago
Aer Lingus
Thu, 15 Jan - Wed, 21 Jan
LHR
London
IAD
Washington
€484 Return, found 6 hours ago
€484
Return
found 6 hours ago
Select Aer Lingus flight, departing Thu, 15 Jan from London to Washington, returning Wed, 21 Jan, priced at €484 found 6 hours ago
Lufthansa
Thu, 29 Jan - Thu, 5 Feb
LHR
London
IAD
Washington
€489 Return, found 2 days ago
€489
Return
found 2 days ago
Select Lufthansa flight, departing Thu, 29 Jan from London to Washington, returning Thu, 5 Feb, priced at €489 found 2 days ago
Scandinavian Airlines
Thu, 5 Feb - Mon, 9 Feb
LHR
London
IAD
Washington
€491 Return, found 5 days ago
€491
Return
found 5 days ago
Select Scandinavian Airlines flight, departing Thu, 5 Feb from London to Washington, returning Mon, 9 Feb, priced at €491 found 5 days ago
Iberia
Wed, 11 Feb - Sat, 28 Feb
LHR
London
IAD
Washington
€503 Return, found 9 hours ago
€503
Return
found 9 hours ago
Select Iberia flight, departing Wed, 11 Feb from London to Washington, returning Sat, 28 Feb, priced at €503 found 9 hours ago
United
Thu, 29 Jan - Thu, 5 Feb
LHR
London
IAD
Washington
€508 Return, found 2 days ago
€508
Return
found 2 days ago
Select United flight, departing Thu, 29 Jan from London to Washington, returning Thu, 5 Feb, priced at €508 found 2 days ago

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

February is typically the cheapest month to fly

From €399 - €669 per traveller.
London to Washington route information
Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
€458
Distance
5866 km
Average flight time
3 hours 36 mins

Perfect flights from London to Washington

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Picture yourself strolling through the streets of , 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 €461 and roundtrip prices from €458. 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.
 
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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 to travel arrangements today and embark on the journey of a lifetime in Washington.

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 €458. 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.

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