฿13,915 Cheap Flights from Washington (IAD) to London (LON)

View ฿13,915 flight on Sat, 18 Apr 2026Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to London

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Cheap Flights from Washington (IAD) to London (LON)

Prices were available within the past 7 days and start at ฿13,915 for one-way flights and ฿29,825 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿29,825 Return, found 1 hour ago
฿29,825
Return
found 1 hour ago
Select United flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿29,825 found 1 hour ago
Virgin Atlantic
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿29,955 Return, found 1 hour ago
฿29,955
Return
found 1 hour ago
Select Virgin Atlantic flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿29,955 found 1 hour ago
British Airways
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,055 Return, found 1 hour ago
฿30,055
Return
found 1 hour ago
Select British Airways flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,055 found 1 hour ago
United
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,190 Return, found 1 hour ago
฿30,190
Return
found 1 hour ago
Select United flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,190 found 1 hour ago
United
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,285 Return, found 1 hour ago
฿30,285
Return
found 1 hour ago
Select United flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,285 found 1 hour ago
United
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,760 Return, found 1 hour ago
฿30,760
Return
found 1 hour ago
Select United flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,760 found 1 hour ago
Lufthansa
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,780 Return, found 1 hour ago
฿30,780
Return
found 1 hour ago
Select Lufthansa flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,780 found 1 hour ago
Swiss International Air Lines
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,805 Return, found 1 hour ago
฿30,805
Return
found 1 hour ago
Select Swiss International Air Lines flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,805 found 1 hour ago
United
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿30,870 Return, found 1 hour ago
฿30,870
Return
found 1 hour ago
Select United flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿30,870 found 1 hour ago
Lufthansa
Mon, 30 Mar - Tue, 7 Apr
IAD
Washington
LHR
London
฿31,035 Return, found 1 hour ago
฿31,035
Return
found 1 hour ago
Select Lufthansa flight, departing Mon, 30 Mar from Washington to London, returning Tue, 7 Apr, priced at ฿31,035 found 1 hour ago

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

March is typically the cheapest month to fly

From ฿12,375 - ฿26,093 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 ฿29,825. 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
฿29,825
Distance
5866 km

Book with confidence

Perfect flights from Washington to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Washington to London. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Washington Dulles Intl. to LON-All Airports ticket options cater to your travel preferences, with incredible one-way fares from ฿13,915 and roundtrip prices from ฿29,825. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at LON-All Airports and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in London.
Perfect flights from Washington to London
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