S$492 Cheap Flights from Washington to London

View S$492 flight on Sun, 9 Nov, 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 S$492 for one-way flights and S$786 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, 16 Jul - Thu, 24 Jul
IAD
Washington
LHR
London
S$786 Return, found 9 hours ago
S$786
Return
found 9 hours ago
Select British Airways flight, departing Wed, 16 Jul from Washington to London, returning Thu, 24 Jul, priced at S$786 found 9 hours ago
British Airways
Mon, 14 Jul - Wed, 23 Jul
IAD
Washington
LHR
London
S$787 Return, found 5 days ago
S$787
Return
found 5 days ago
Select British Airways flight, departing Mon, 14 Jul from Washington to London, returning Wed, 23 Jul, priced at S$787 found 5 days ago
KLM
Wed, 16 Jul - Thu, 24 Jul
IAD
Washington
LHR
London
S$808 Return, found 9 hours ago
S$808
Return
found 9 hours ago
Select KLM flight, departing Wed, 16 Jul from Washington to London, returning Thu, 24 Jul, priced at S$808 found 9 hours ago
Air France
Tue, 12 Aug - Sat, 23 Aug
IAD
Washington
LHR
London
S$816 Return, found 8 hours ago
S$816
Return
found 8 hours ago
Select Air France flight, departing Tue, 12 Aug from Washington to London, returning Sat, 23 Aug, priced at S$816 found 8 hours ago
Air France
Tue, 12 Aug - Sat, 23 Aug
IAD
Washington
LHR
London
S$821 Return, found 8 hours ago
S$821
Return
found 8 hours ago
Select Air France flight, departing Tue, 12 Aug from Washington to London, returning Sat, 23 Aug, priced at S$821 found 8 hours ago
United
Mon, 15 Sep - Fri, 26 Sep
IAD
Washington
LHR
London
S$845 Return, found 6 days ago
S$845
Return
found 6 days ago
Select United flight, departing Mon, 15 Sep from Washington to London, returning Fri, 26 Sep, priced at S$845 found 6 days ago
Delta
Wed, 16 Jul - Thu, 24 Jul
IAD
Washington
LCY
London
S$846 Return, found 9 hours ago
S$846
Return
found 9 hours ago
Select Delta flight, departing Wed, 16 Jul from Washington to London, returning Thu, 24 Jul, priced at S$846 found 9 hours ago
United
Mon, 15 Sep - Fri, 26 Sep
IAD
Washington
LHR
London
S$855 Return, found 6 days ago
S$855
Return
found 6 days ago
Select United flight, departing Mon, 15 Sep from Washington to London, returning Fri, 26 Sep, priced at S$855 found 6 days ago
Delta
Mon, 15 Sep - Fri, 26 Sep
IAD
Washington
LHR
London
S$874 Return, found 6 days ago
S$874
Return
found 6 days ago
Select Delta flight, departing Mon, 15 Sep from Washington to London, returning Fri, 26 Sep, priced at S$874 found 6 days ago
Virgin Atlantic
Tue, 12 Aug - Sat, 23 Aug
IAD
Washington
LHR
London
S$884 Return, found 8 hours ago
S$884
Return
found 8 hours ago
Select Virgin Atlantic flight, departing Tue, 12 Aug from Washington to London, returning Sat, 23 Aug, priced at S$884 found 8 hours ago
Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Return price
S$785
Distance
5866 km

Perfect flights from Washington to London

Your Journey from Washington to London

Start your unforgettable journey with Expedia. Our broad selection of flights from Washington to London caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, Virgin Atlantic, Air Canada, British Airways, Delta, Air France, KLM, Swiss International Air Lines, Lufthansa. 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.
 

Maximizing Value with Washington to London Flights

Experience the joy of finding cheap flights from Washington Dulles Intl. to LON-All Airports that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$492 and roundtrip prices from S$786*.
 

Pre-Flight Essentials

Ensure a smooth journey from Washington to London with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant London

Picture yourself stepping off the plane in London and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

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.
 

Beyond the Flight – Exploring London

With Expedia, your adventure extends beyond the flight. Explore London at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Washington to London with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Washington to London with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

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 S$786. 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.

Explore a world of travel with Expedia

London Airports

London

Washington to Heathrow
S$785.40
Washington Airports

Baltimore

Baltimore Washington Intl. Thurgood Marshall to London
S$736.20

Washington

*Available to Expedia members.