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฿14,805 Cheap Flights from London (LHR) to Washington (IAD)

Photo by Metropolitan Washington Airports Authority
Open Photo by Metropolitan Washington Airports Authority

Cheap Flights from London to Washington (LHR-IAD)

Prices were available within the past 7 days and start at ฿14,805 for one-way flights and ฿23,220 for return, for the period specified. Prices and availability are subject to change.
Finnair
Fri, 4 Sep - Fri, 11 Sep
LHR
London
IAD
Washington
฿23,220
Return
Found 3 days ago
Select Finnair flight, departing Fri, 4 Sep from London to Washington, returning Fri, 11 Sep, priced at ฿23,220 Found 3 days ago
Swiss International Air Lines
Fri, 4 Sep - Fri, 11 Sep
LHR
London
IAD
Washington
฿24,080
Return
Found 3 days ago
Select Swiss International Air Lines flight, departing Fri, 4 Sep from London to Washington, returning Fri, 11 Sep, priced at ฿24,080 Found 3 days ago
Lufthansa
Sat, 10 Oct - Tue, 20 Oct
LHR
London
IAD
Washington
฿24,130
Return
Found 6 days ago
Select Lufthansa flight, departing Sat, 10 Oct from London to Washington, returning Tue, 20 Oct, priced at ฿24,130 Found 6 days ago
Austrian Airlines
Fri, 4 Sep - Fri, 11 Sep
LHR
London
IAD
Washington
฿24,165
Return
Found 3 days ago
Select Austrian Airlines flight, departing Fri, 4 Sep from London to Washington, returning Fri, 11 Sep, priced at ฿24,165 Found 3 days ago
Air Canada
Fri, 4 Sep - Fri, 11 Sep
LHR
London
IAD
Washington
฿24,200
Return
Found 3 days ago
Select Air Canada flight, departing Fri, 4 Sep from London to Washington, returning Fri, 11 Sep, priced at ฿24,200 Found 3 days ago
American Airlines
Mon, 14 Sep - Mon, 21 Sep
LHR
London
IAD
Washington
฿24,585
Return
Found 3 days ago
Select American Airlines flight, departing Mon, 14 Sep from London to Washington, returning Mon, 21 Sep, priced at ฿24,585 Found 3 days ago
United
Sat, 26 Sep - Mon, 5 Oct
LHR
London
IAD
Washington
฿24,610
Return
Found 2 days ago
Select United flight, departing Sat, 26 Sep from London to Washington, returning Mon, 5 Oct, priced at ฿24,610 Found 2 days ago
British Airways
Sat, 26 Sep - Mon, 5 Oct
LHR
London
IAD
Washington
฿25,795
Return
Found 2 days ago
Select British Airways flight, departing Sat, 26 Sep from London to Washington, returning Mon, 5 Oct, priced at ฿25,795 Found 2 days ago
KLM
Sat, 26 Sep - Mon, 5 Oct
LHR
London
IAD
Washington
฿25,950
Return
Found 2 days ago
Select KLM flight, departing Sat, 26 Sep from London to Washington, returning Mon, 5 Oct, priced at ฿25,950 Found 2 days ago
Air France
Sat, 26 Sep - Mon, 5 Oct
LHR
London
IAD
Washington
฿26,565
Return
Found 2 days ago
Select Air France flight, departing Sat, 26 Sep from London to Washington, returning Mon, 5 Oct, priced at ฿26,565 Found 2 days ago

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

April is typically the cheapest month to fly

From ฿15,339 - ฿27,770 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 ฿23,220. 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 Airport
Destination airport
Washington Dulles International Airport
Distance
5,901 km away
Airlines serving
Lufthansa, Austrian Airlines, Brussels Airlines, Swiss International Air Lines, Aer Lingus, Iberia, Finnair, British Airways, KLM, Air France, TAP Portugal, Virgin Atlantic, Air Canada, SAS, Icelandair, Turkish Airlines, United, Royal Air Maroc, American Airlines, ITA Airways, Delta, Avianca, Alaska Airlines, Aeromexico
Popular airline
Lufthansa
Return price
฿23,220
Average flight time
8 hours 15 mins
*Available to Expedia members.