Cheap Flights from Washington (IAD) to London (LHR) from HK$3,006~

View HK$3,006 flight on Wed, 4 Feb 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at HK$3,006 for one-way flights and HK$4,778 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Fri, 2 Oct - Mon, 12 Oct
IAD
Washington
LHR
London
HK$4,778 Return, found 16 hours ago
HK$4,778
Return
found 16 hours ago
Select Scandinavian Airlines flight, departing Fri, 2 Oct from Washington to London, returning Mon, 12 Oct, priced at HK$4,778 found 16 hours ago
Scandinavian Airlines
Fri, 28 Aug - Mon, 7 Sept
IAD
Washington
LHR
London
HK$4,807 Return, found 16 hours ago
HK$4,807
Return
found 16 hours ago
Select Scandinavian Airlines flight, departing Fri, 28 Aug from Washington to London, returning Mon, 7 Sept, priced at HK$4,807 found 16 hours ago
Scandinavian Airlines
Fri, 2 Oct - Mon, 12 Oct
IAD
Washington
LHR
London
HK$4,835 Return, found 16 hours ago
HK$4,835
Return
found 16 hours ago
Select Scandinavian Airlines flight, departing Fri, 2 Oct from Washington to London, returning Mon, 12 Oct, priced at HK$4,835 found 16 hours ago
Scandinavian Airlines
Mon, 16 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$4,950 Return, found 3 days ago
HK$4,950
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Mon, 16 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$4,950 found 3 days ago
Scandinavian Airlines
Mon, 16 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$4,979 Return, found 3 days ago
HK$4,979
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Mon, 16 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$4,979 found 3 days ago
Scandinavian Airlines
Mon, 16 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$5,007 Return, found 3 days ago
HK$5,007
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Mon, 16 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$5,007 found 3 days ago
Delta
Sun, 15 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$5,021 Return, found 3 days ago
HK$5,021
Return
found 3 days ago
Select Delta flight, departing Sun, 15 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$5,021 found 3 days ago
Virgin Atlantic
Sun, 15 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$5,021 Return, found 3 days ago
HK$5,021
Return
found 3 days ago
Select Virgin Atlantic flight, departing Sun, 15 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$5,021 found 3 days ago
United
Fri, 2 Oct - Mon, 12 Oct
IAD
Washington
LHR
London
HK$5,557 Return, found 16 hours ago
HK$5,557
Return
found 16 hours ago
Select United flight, departing Fri, 2 Oct from Washington to London, returning Mon, 12 Oct, priced at HK$5,557 found 16 hours ago
Austrian Airlines
Sun, 15 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$5,674 Return, found 3 days ago
HK$5,674
Return
found 3 days ago
Select Austrian Airlines flight, departing Sun, 15 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$5,674 found 3 days ago
Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, Delta, Finnair, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Return price
HK$4,778
Distance
5866 km
Average flight time
12 hours 25 mins

Flights from Chantilly to London

Book cheap flights from Chantilly (IAD) to London (LHR) 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 Chantilly (IAD) to London (LHR) 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 Chantilly (IAD) to London (LHR) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

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

If you would like to book flights to London more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to London is HK$3,006 now!

 

Frequently asked questions

How much is a flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
Start packing your suitcase, because round-trip journeys from IAD to London Heathrow start from HK$4,778. That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book today to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Dulles Intl. Airport to Heathrow Airport?
We understand that things come up unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Dulles Intl. Airport to Heathrow Airport (LHR) 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 IAD to Heathrow Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Dulles Intl. Airport to LHR?
You'll have 5,900 kilometers to cover on the long-haul Chantilly to Hounslow route. Dress in layers of comfortable clothes and consider taking a sleep mask and earplugs.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Heathrow Airport?
With 60 flights a month from Dulles Intl. Airport to LHR, United Airlines (UA) is an excellent choice. Another carrier operating on this route is British Airways (BA). You'll have 60 flights every month to choose from.
Are IAD to LHR flight tickets cheaper when they're purchased at the last minute?
Booking your trip from IAD to London Heathrow at the last minute could be your ticket to a great deal. However, it could end up costing a great deal more! If you'd prefer to err on the side of caution, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to a year in advance. If your preferred carrier hasn't released tickets yet, check back regularly as deals are updated on Expedia all the time.
*Available to Expedia members.