RM1,646 Cheap Flights from Washington (IAD) to London (LON)

View RM1,646 flight on Sat, 25 Oct 2025Opens in a new window

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

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Cheap Flights from Washington to London (IAD-LON)

Prices were available within the past 7 days and start at RM1,646 for one-way flights and RM2,776 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 25 Oct - Wed, 29 Oct
IAD
Washington
LHR
London
RM2,776 Return, found 6 days ago
RM2,776
Return
found 6 days ago
Select United flight, departing Sat, 25 Oct from Washington to London, returning Wed, 29 Oct, priced at RM2,776 found 6 days ago
United
Fri, 12 Dec - Tue, 16 Dec
IAD
Washington
LHR
London
RM2,835 Return, found 6 days ago
RM2,835
Return
found 6 days ago
Select United flight, departing Fri, 12 Dec from Washington to London, returning Tue, 16 Dec, priced at RM2,835 found 6 days ago
United
Sat, 25 Oct - Wed, 29 Oct
IAD
Washington
LHR
London
RM2,850 Return, found 6 days ago
RM2,850
Return
found 6 days ago
Select United flight, departing Sat, 25 Oct from Washington to London, returning Wed, 29 Oct, priced at RM2,850 found 6 days ago
United
Sat, 25 Oct - Wed, 29 Oct
IAD
Washington
LHR
London
RM2,898 Return, found 6 days ago
RM2,898
Return
found 6 days ago
Select United flight, departing Sat, 25 Oct from Washington to London, returning Wed, 29 Oct, priced at RM2,898 found 6 days ago
United
Fri, 12 Dec - Tue, 16 Dec
IAD
Washington
LHR
London
RM2,900 Return, found 6 days ago
RM2,900
Return
found 6 days ago
Select United flight, departing Fri, 12 Dec from Washington to London, returning Tue, 16 Dec, priced at RM2,900 found 6 days ago
United
Sat, 25 Oct - Wed, 29 Oct
IAD
Washington
LHR
London
RM2,927 Return, found 6 days ago
RM2,927
Return
found 6 days ago
Select United flight, departing Sat, 25 Oct from Washington to London, returning Wed, 29 Oct, priced at RM2,927 found 6 days ago
British Airways
Fri, 12 Dec - Tue, 16 Dec
IAD
Washington
LHR
London
RM3,016 Return, found 6 days ago
RM3,016
Return
found 6 days ago
Select British Airways flight, departing Fri, 12 Dec from Washington to London, returning Tue, 16 Dec, priced at RM3,016 found 6 days ago
Swiss International Air Lines
Fri, 12 Dec - Tue, 16 Dec
IAD
Washington
LHR
London
RM3,446 Return, found 6 days ago
RM3,446
Return
found 6 days ago
Select Swiss International Air Lines flight, departing Fri, 12 Dec from Washington to London, returning Tue, 16 Dec, priced at RM3,446 found 6 days ago
Lufthansa
Fri, 12 Dec - Tue, 16 Dec
IAD
Washington
LHR
London
RM3,721 Return, found 6 days ago
RM3,721
Return
found 6 days ago
Select Lufthansa flight, departing Fri, 12 Dec from Washington to London, returning Tue, 16 Dec, priced at RM3,721 found 6 days ago
Turkish Airlines
Fri, 12 Dec - Tue, 16 Dec
IAD
Washington
LHR
London
RM4,783 Return, found 6 days ago
RM4,783
Return
found 6 days ago
Select Turkish Airlines flight, departing Fri, 12 Dec from Washington to London, returning Tue, 16 Dec, priced at RM4,783 found 6 days ago

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

March is typically the cheapest month to fly

From RM 1,604 - RM 3,411 per traveller.

Frequently asked questions

How much is a flight from IAD to London (LON-All Airports)?
If you're travelling from Washington Dulles Intl. Airport (IAD) to London (LON-All Airports), round-trip journeys start from RM2,776. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal slip through your fingers. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from IAD to London (LON-All Airports)?
This varies between airlines, as each has its own terms and conditions. Head to the Customer Service Portal, where there are easy-to-follow instructions on how to cancel your flight online.
How do I find cheap flights from Dulles Intl. Airport to London (LON-All Airports) 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 Dulles Intl. Airport to London (LON-All Airports) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from IAD to London (LON-All Airports)?
The distance is around 5,900 kilometres, so fill your carry-on luggage with whatever you need to make your journey comfortable. Wondering what to take on board your Chantilly to England flight? A travel pillow, earplugs and a sleep mask are among the essentials.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to London (LON-All Airports)?
United Airlines (UA) is the number one choice for many travellers. It offers 60 flights from Dulles Intl. Airport to London (LON-All Airports) each month. If you want more options, check out the fares from British Airways (BA). This airlines operates 60 monthly flights between these airports.
Are Dulles Intl. Airport to London (LON-All Airports) flight tickets cheaper when they're purchased at the last minute?
It is possible to pick up great last-minute deals from IAD to London (LON-All Airports), but it can also be hit-or-miss. As many airlines release seats up to a year in advance, it's worth keeping an eye on fares early and being ready to book when you spot a good bargain. Expedia compares carrier prices and updates flight deals regularly, so you can rest easy knowing you're always getting the latest offers.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Return price
RM2,776
Distance
5866 km

Book with confidence

Perfect flights from Washington to London

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Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, Lufthansa, British Airways, Delta, KLM, Swiss International Air Lines, Turkish Airlines. Our selection of flights from Washington Dulles Intl. to LON-All Airports caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

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Added Convenience on Your Washington to London Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Washington to London.
 

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*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Washington to London

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