S$696 Cheap Flights from London to Washington

View S$696 flight on Mon, 9 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 S$696 for one-way flights and S$875 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 5 Dec - Sun, 7 Dec
LHR
London
IAD
Washington
S$875 Return, found 4 days ago
S$875
Return
found 4 days ago
Select Delta flight, departing Fri, 5 Dec from London to Washington, returning Sun, 7 Dec, priced at S$875 found 4 days ago
Delta
Fri, 5 Dec - Tue, 9 Dec
LHR
London
IAD
Washington
S$902 Return, found 3 days ago
S$902
Return
found 3 days ago
Select Delta flight, departing Fri, 5 Dec from London to Washington, returning Tue, 9 Dec, priced at S$902 found 3 days ago
Delta
Fri, 5 Dec - Tue, 9 Dec
LHR
London
IAD
Washington
S$909 Return, found 3 days ago
S$909
Return
found 3 days ago
Select Delta flight, departing Fri, 5 Dec from London to Washington, returning Tue, 9 Dec, priced at S$909 found 3 days ago
Air France
Fri, 5 Dec - Sun, 7 Dec
LHR
London
IAD
Washington
S$910 Return, found 4 days ago
S$910
Return
found 4 days ago
Select Air France flight, departing Fri, 5 Dec from London to Washington, returning Sun, 7 Dec, priced at S$910 found 4 days ago
KLM
Fri, 5 Dec - Tue, 9 Dec
LHR
London
IAD
Washington
S$914 Return, found 3 days ago
S$914
Return
found 3 days ago
Select KLM flight, departing Fri, 5 Dec from London to Washington, returning Tue, 9 Dec, priced at S$914 found 3 days ago
Delta
Thu, 4 Dec - Wed, 10 Dec
LHR
London
IAD
Washington
S$920 Return, found 4 days ago
S$920
Return
found 4 days ago
Select Delta flight, departing Thu, 4 Dec from London to Washington, returning Wed, 10 Dec, priced at S$920 found 4 days ago
Delta
Tue, 23 Dec - Sun, 28 Dec
LHR
London
IAD
Washington
S$929 Return, found 9 hours ago
S$929
Return
found 9 hours ago
Select Delta flight, departing Tue, 23 Dec from London to Washington, returning Sun, 28 Dec, priced at S$929 found 9 hours ago
KLM
Fri, 5 Dec - Sun, 7 Dec
LHR
London
IAD
Washington
S$944 Return, found 4 days ago
S$944
Return
found 4 days ago
Select KLM flight, departing Fri, 5 Dec from London to Washington, returning Sun, 7 Dec, priced at S$944 found 4 days ago
United
Sun, 8 Feb - Thu, 12 Feb
LHR
London
IAD
Washington
S$1,069 Return, found 2 days ago
S$1,069
Return
found 2 days ago
Select United flight, departing Sun, 8 Feb from London to Washington, returning Thu, 12 Feb, priced at S$1,069 found 2 days ago
Austrian Airlines
Sun, 8 Feb - Thu, 12 Feb
LHR
London
IAD
Washington
S$1,080 Return, found 2 days ago
S$1,080
Return
found 2 days ago
Select Austrian Airlines flight, departing Sun, 8 Feb from London to Washington, returning Thu, 12 Feb, priced at S$1,080 found 2 days ago

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

November is typically the cheapest month to fly

From S$593 - S$1,000 per traveller.

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city centre is 36 minutes. Flights from S$1,733
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city centre36 min
Flights from S$1,733

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$875. 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
Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Return price
S$875
Distance
5866 km
Average flight time
3 hours 36 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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