Cheap Flights from London (LHR) to Washington (IAD) from HK$5,787~

View HK$5,787 flight on Thu, 25 Sep 2025Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)

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Find Cheap Flights from London (LHR) to Washington (IAD)

Prices were available within the past 7 days and start at HK$5,787 for one-way flights and HK$4,967 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$4,967 Return, found 1 day ago
HK$4,967
Return
found 1 day ago
Select Delta flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$4,967 found 1 day ago
Virgin Atlantic
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$4,967 Return, found 1 day ago
HK$4,967
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$4,967 found 1 day ago
United
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,059 Return, found 1 day ago
HK$5,059
Return
found 1 day ago
Select United flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,059 found 1 day ago
American Airlines
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,061 Return, found 1 day ago
HK$5,061
Return
found 1 day ago
Select American Airlines flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,061 found 1 day ago
United
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,080 Return, found 1 day ago
HK$5,080
Return
found 1 day ago
Select United flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,080 found 1 day ago
Virgin Atlantic
Mon, 25 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,095 Return, found 12 hours ago
HK$5,095
Return
found 12 hours ago
Select Virgin Atlantic flight, departing Mon, 25 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,095 found 12 hours ago
American Airlines
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,105 Return, found 1 day ago
HK$5,105
Return
found 1 day ago
Select American Airlines flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,105 found 1 day ago
United
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,111 Return, found 1 day ago
HK$5,111
Return
found 1 day ago
Select United flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,111 found 1 day ago
United
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,128 Return, found 1 day ago
HK$5,128
Return
found 1 day ago
Select United flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,128 found 1 day ago
Austrian Airlines
Sun, 24 Aug - Tue, 9 Sep
LHR
London
IAD
Washington
HK$5,213 Return, found 1 day ago
HK$5,213
Return
found 1 day ago
Select Austrian Airlines flight, departing Sun, 24 Aug from London to Washington, returning Tue, 9 Sep, priced at HK$5,213 found 1 day ago

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

October is typically the cheapest month to fly

From HK$3,699 - HK$6,250 per traveller.

Graph displaying average flight prices per month

London to Washington route information
Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, Delta, Finnair, Iberia, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, United, Virgin Atlantic
Return price
HK$4,967
Distance
5866 km
Average flight time
3 hours 15 mins

Flights from London to Chantilly

Book cheap flights from London (LHR) to Chantilly (IAD) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from London (LHR) to Chantilly (IAD) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your London (LHR) to Chantilly (IAD) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Chantilly flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Chantilly and things to do in Chantilly for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Chantilly more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Chantilly is HK$5,787 now!

 

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 HK$4,967. 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 kilometers 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-canceling 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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