S$741 Cheap Flights from London to Washington

View S$741 flight on Mon, 28 Sept, 2026Opens in a new window

Flight 1

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 S$741 for one-way flights and S$805 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Mon, 28 Sept - Wed, 7 Oct
LHR
London
IAD
Washington
S$805 Return, found 4 days ago
S$805
Return
found 4 days ago
Select Icelandair flight, departing Mon, 28 Sept from London to Washington, returning Wed, 7 Oct, priced at S$805 found 4 days ago
Swiss International Air Lines
Sat, 28 Nov - Sun, 6 Dec
LHR
London
IAD
Washington
S$877 Return, found 5 days ago
S$877
Return
found 5 days ago
Select Swiss International Air Lines flight, departing Sat, 28 Nov from London to Washington, returning Sun, 6 Dec, priced at S$877 found 5 days ago
Austrian Airlines
Wed, 7 Oct - Wed, 14 Oct
LHR
London
IAD
Washington
S$882 Return, found 12 hours ago
S$882
Return
found 12 hours ago
Select Austrian Airlines flight, departing Wed, 7 Oct from London to Washington, returning Wed, 14 Oct, priced at S$882 found 12 hours ago
Lufthansa
Sat, 28 Nov - Sun, 6 Dec
LHR
London
IAD
Washington
S$885 Return, found 5 days ago
S$885
Return
found 5 days ago
Select Lufthansa flight, departing Sat, 28 Nov from London to Washington, returning Sun, 6 Dec, priced at S$885 found 5 days ago
Brussels Airlines
Mon, 28 Sept - Wed, 7 Oct
LHR
London
IAD
Washington
S$888 Return, found 4 days ago
S$888
Return
found 4 days ago
Select Brussels Airlines flight, departing Mon, 28 Sept from London to Washington, returning Wed, 7 Oct, priced at S$888 found 4 days ago
United
Sat, 28 Nov - Sun, 6 Dec
LHR
London
IAD
Washington
S$915 Return, found 5 days ago
S$915
Return
found 5 days ago
Select United flight, departing Sat, 28 Nov from London to Washington, returning Sun, 6 Dec, priced at S$915 found 5 days ago
Austrian Airlines
Wed, 7 Oct - Wed, 14 Oct
LHR
London
IAD
Washington
S$927 Return, found 12 hours ago
S$927
Return
found 12 hours ago
Select Austrian Airlines flight, departing Wed, 7 Oct from London to Washington, returning Wed, 14 Oct, priced at S$927 found 12 hours ago
Finnair
Wed, 7 Oct - Wed, 14 Oct
LHR
London
IAD
Washington
S$930 Return, found 12 hours ago
S$930
Return
found 12 hours ago
Select Finnair flight, departing Wed, 7 Oct from London to Washington, returning Wed, 14 Oct, priced at S$930 found 12 hours ago
American Airlines
Wed, 7 Oct - Wed, 14 Oct
LHR
London
IAD
Washington
S$956 Return, found 12 hours ago
S$956
Return
found 12 hours ago
Select American Airlines flight, departing Wed, 7 Oct from London to Washington, returning Wed, 14 Oct, priced at S$956 found 12 hours ago
Virgin Atlantic
Mon, 28 Sept - Wed, 7 Oct
LHR
London
IAD
Washington
S$993 Return, found 4 days ago
S$993
Return
found 4 days ago
Select Virgin Atlantic flight, departing Mon, 28 Sept from London to Washington, returning Wed, 7 Oct, priced at S$993 found 4 days ago

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 S$805. 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.
Return price
S$804
Distance
5866 km
Average flight time
3 hours 16 mins

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Perfect flights from London to Washington

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*Note: Prices may vary based on availability and are subject to change.
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