Cheap Flights from London (LHR) to Washington (IAD) from HK$4,332~

View HK$4,332 flight on Sun, 25 Jan 2026Opens 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$4,332 for one-way flights and HK$4,927 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Sun, 1 Feb - Sat, 7 Feb
LHR
London
IAD
Washington
HK$4,927 Return, found 2 days ago
HK$4,927
Return
found 2 days ago
Select Scandinavian Airlines flight, departing Sun, 1 Feb from London to Washington, returning Sat, 7 Feb, priced at HK$4,927 found 2 days ago
Scandinavian Airlines
Sun, 1 Feb - Sat, 7 Feb
LHR
London
IAD
Washington
HK$4,956 Return, found 2 days ago
HK$4,956
Return
found 2 days ago
Select Scandinavian Airlines flight, departing Sun, 1 Feb from London to Washington, returning Sat, 7 Feb, priced at HK$4,956 found 2 days ago
Scandinavian Airlines
Sun, 1 Feb - Sat, 7 Feb
LHR
London
IAD
Washington
HK$4,983 Return, found 2 days ago
HK$4,983
Return
found 2 days ago
Select Scandinavian Airlines flight, departing Sun, 1 Feb from London to Washington, returning Sat, 7 Feb, priced at HK$4,983 found 2 days ago
Scandinavian Airlines
Sun, 1 Feb - Sat, 7 Feb
LHR
London
IAD
Washington
HK$5,060 Return, found 2 days ago
HK$5,060
Return
found 2 days ago
Select Scandinavian Airlines flight, departing Sun, 1 Feb from London to Washington, returning Sat, 7 Feb, priced at HK$5,060 found 2 days ago
Scandinavian Airlines
Sun, 1 Feb - Sat, 7 Feb
LHR
London
IAD
Washington
HK$5,087 Return, found 2 days ago
HK$5,087
Return
found 2 days ago
Select Scandinavian Airlines flight, departing Sun, 1 Feb from London to Washington, returning Sat, 7 Feb, priced at HK$5,087 found 2 days ago
Scandinavian Airlines
Sun, 1 Feb - Sat, 7 Feb
LHR
London
IAD
Washington
HK$5,089 Return, found 2 days ago
HK$5,089
Return
found 2 days ago
Select Scandinavian Airlines flight, departing Sun, 1 Feb from London to Washington, returning Sat, 7 Feb, priced at HK$5,089 found 2 days ago
Iberia
Thu, 22 Jan - Wed, 4 Feb
LHR
London
IAD
Washington
HK$5,913 Return, found 6 days ago
HK$5,913
Return
found 6 days ago
Select Iberia flight, departing Thu, 22 Jan from London to Washington, returning Wed, 4 Feb, priced at HK$5,913 found 6 days ago
Delta
Thu, 22 Jan - Wed, 4 Feb
LHR
London
IAD
Washington
HK$5,939 Return, found 6 days ago
HK$5,939
Return
found 6 days ago
Select Delta flight, departing Thu, 22 Jan from London to Washington, returning Wed, 4 Feb, priced at HK$5,939 found 6 days ago
Virgin Atlantic
Thu, 22 Jan - Wed, 4 Feb
LHR
London
IAD
Washington
HK$6,067 Return, found 6 days ago
HK$6,067
Return
found 6 days ago
Select Virgin Atlantic flight, departing Thu, 22 Jan from London to Washington, returning Wed, 4 Feb, priced at HK$6,067 found 6 days ago
Air France
Thu, 22 Jan - Wed, 4 Feb
LHR
London
IAD
Washington
HK$6,285 Return, found 6 days ago
HK$6,285
Return
found 6 days ago
Select Air France flight, departing Thu, 22 Jan from London to Washington, returning Wed, 4 Feb, priced at HK$6,285 found 6 days ago

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

January is typically the cheapest month to fly

From HK$3,605 - HK$8,870 per traveller.
London to Washington route information
Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Return price
HK$4,927
Distance
5866 km
Average flight time
3 hours 36 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$4,332 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$4,927. 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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