Cheap Flights from Washington (IAD) to London (LHR) from HK$3,008~

View HK$3,008 flight on Tue, 17 Mar 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$3,008 for one-way flights and HK$4,938 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, 6 Mar - Sun, 15 Mar
IAD
Washington
LHR
London
HK$4,938 Return, found 2 days ago
HK$4,938
Return
found 2 days ago
Select United flight, departing Fri, 6 Mar from Washington to London, returning Sun, 15 Mar, priced at HK$4,938 found 2 days ago
United
Sat, 14 Mar - Tue, 17 Mar
IAD
Washington
LHR
London
HK$4,947 Return, found 18 hours ago
HK$4,947
Return
found 18 hours ago
Select United flight, departing Sat, 14 Mar from Washington to London, returning Tue, 17 Mar, priced at HK$4,947 found 18 hours ago
Scandinavian Airlines
Sat, 14 Mar - Tue, 17 Mar
IAD
Washington
LHR
London
HK$5,000 Return, found 18 hours ago
HK$5,000
Return
found 18 hours ago
Select Scandinavian Airlines flight, departing Sat, 14 Mar from Washington to London, returning Tue, 17 Mar, priced at HK$5,000 found 18 hours ago
Delta
Fri, 13 Mar - Sun, 22 Mar
IAD
Washington
LHR
London
HK$5,025 Return, found 6 days ago
HK$5,025
Return
found 6 days ago
Select Delta flight, departing Fri, 13 Mar from Washington to London, returning Sun, 22 Mar, priced at HK$5,025 found 6 days ago
Virgin Atlantic
Sat, 7 Mar - Sun, 15 Mar
IAD
Washington
LHR
London
HK$5,049 Return, found 2 days ago
HK$5,049
Return
found 2 days ago
Select Virgin Atlantic flight, departing Sat, 7 Mar from Washington to London, returning Sun, 15 Mar, priced at HK$5,049 found 2 days ago
United
Fri, 6 Mar - Sun, 15 Mar
IAD
Washington
LHR
London
HK$5,057 Return, found 2 days ago
HK$5,057
Return
found 2 days ago
Select United flight, departing Fri, 6 Mar from Washington to London, returning Sun, 15 Mar, priced at HK$5,057 found 2 days ago
United
Sat, 14 Mar - Tue, 17 Mar
IAD
Washington
LHR
London
HK$5,066 Return, found 18 hours ago
HK$5,066
Return
found 18 hours ago
Select United flight, departing Sat, 14 Mar from Washington to London, returning Tue, 17 Mar, priced at HK$5,066 found 18 hours ago
United
Fri, 6 Mar - Sun, 15 Mar
IAD
Washington
LHR
London
HK$5,084 Return, found 2 days ago
HK$5,084
Return
found 2 days ago
Select United flight, departing Fri, 6 Mar from Washington to London, returning Sun, 15 Mar, priced at HK$5,084 found 2 days ago
United
Sat, 14 Mar - Tue, 17 Mar
IAD
Washington
LHR
London
HK$5,093 Return, found 18 hours ago
HK$5,093
Return
found 18 hours ago
Select United flight, departing Sat, 14 Mar from Washington to London, returning Tue, 17 Mar, priced at HK$5,093 found 18 hours ago
Turkish Airlines
Sat, 14 Mar - Tue, 17 Mar
IAD
Washington
LHR
London
HK$6,325 Return, found 18 hours ago
HK$6,325
Return
found 18 hours ago
Select Turkish Airlines flight, departing Sat, 14 Mar from Washington to London, returning Tue, 17 Mar, priced at HK$6,325 found 18 hours ago

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

February is typically the cheapest month to fly

From HK$3,456 - HK$6,154 per traveller.
Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Air France, American Airlines, Austrian Airlines, Delta, Finnair, Lufthansa, Scandinavian Airlines, Turkish Airlines, United, Virgin Atlantic
Return price
HK$4,938
Distance
5866 km
Average flight time
12 hours 22 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$3,008 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$4,938. 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.