€479 Cheap Flights London to Washington (LHR-IAD)

View €479 flight on Tue, 12 May 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 €479 for one-way flights and €495 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Fri, 27 Feb - Mon, 9 Mar
LHR
London
IAD
Washington
€495 Return, found 2 days ago
€495
Return
found 2 days ago
Select TAP Portugal flight, departing Fri, 27 Feb from London to Washington, returning Mon, 9 Mar, priced at €495 found 2 days ago
TAP Portugal
Mon, 16 Mar - Sun, 22 Mar
LHR
London
IAD
Washington
€502 Return, found 2 days ago
€502
Return
found 2 days ago
Select TAP Portugal flight, departing Mon, 16 Mar from London to Washington, returning Sun, 22 Mar, priced at €502 found 2 days ago
Scandinavian Airlines
Thu, 16 Apr - Fri, 24 Apr
LHR
London
IAD
Washington
€514 Return, found 21 hours ago
€514
Return
found 21 hours ago
Select Scandinavian Airlines flight, departing Thu, 16 Apr from London to Washington, returning Fri, 24 Apr, priced at €514 found 21 hours ago
Lufthansa
Fri, 27 Feb - Mon, 9 Mar
LHR
London
IAD
Washington
€518 Return, found 2 days ago
€518
Return
found 2 days ago
Select Lufthansa flight, departing Fri, 27 Feb from London to Washington, returning Mon, 9 Mar, priced at €518 found 2 days ago
Austrian Airlines
Fri, 27 Feb - Sun, 8 Mar
LHR
London
IAD
Washington
€521 Return, found 1 day ago
€521
Return
found 1 day ago
Select Austrian Airlines flight, departing Fri, 27 Feb from London to Washington, returning Sun, 8 Mar, priced at €521 found 1 day ago
Brussels Airlines
Fri, 27 Feb - Sun, 8 Mar
LHR
London
IAD
Washington
€524 Return, found 1 day ago
€524
Return
found 1 day ago
Select Brussels Airlines flight, departing Fri, 27 Feb from London to Washington, returning Sun, 8 Mar, priced at €524 found 1 day ago
Virgin Atlantic
Thu, 16 Apr - Mon, 18 May
LHR
London
IAD
Washington
€526 Return, found 3 days ago
€526
Return
found 3 days ago
Select Virgin Atlantic flight, departing Thu, 16 Apr from London to Washington, returning Mon, 18 May, priced at €526 found 3 days ago
Delta
Thu, 16 Apr - Sat, 25 Apr
LHR
London
IAD
Washington
€526 Return, found 4 days ago
€526
Return
found 4 days ago
Select Delta flight, departing Thu, 16 Apr from London to Washington, returning Sat, 25 Apr, priced at €526 found 4 days ago
British Airways
Sat, 11 Apr - Mon, 20 Apr
LHR
London
IAD
Washington
€534 Return, found 22 hours ago
€534
Return
found 22 hours ago
Select British Airways flight, departing Sat, 11 Apr from London to Washington, returning Mon, 20 Apr, priced at €534 found 22 hours ago
Aer Lingus
Fri, 27 Feb - Mon, 9 Mar
LHR
London
IAD
Washington
€540 Return, found 2 days ago
€540
Return
found 2 days ago
Select Aer Lingus flight, departing Fri, 27 Feb from London to Washington, returning Mon, 9 Mar, priced at €540 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 €400 - €672 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 €495. 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

Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Finnair, ITA Airways, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
€495
Distance
5866 km
Average flight time
3 hours 36 mins

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.
 
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Our flexible Heathrow to Washington Dulles Intl. ticket options cater to your travel preferences, with incredible one-way fares from €479 and roundtrip prices from €495. 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.
Perfect flights from London to Washington

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