S$483 Cheap Flights from Washington to London

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

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Cheap Flights from Washington to London (IAD-LHR)

Prices were available within the past 7 days and start at S$483 for one-way flights and S$949 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Thu, 1 Oct - Tue, 6 Oct
IAD
Washington
LHR
London
S$949 Return, found 4 days ago
S$949
Return
found 4 days ago
Select Icelandair flight, departing Thu, 1 Oct from Washington to London, returning Tue, 6 Oct, priced at S$949 found 4 days ago
Scandinavian Airlines
Thu, 1 Oct - Tue, 6 Oct
IAD
Washington
LHR
London
S$949 Return, found 4 days ago
S$949
Return
found 4 days ago
Select Scandinavian Airlines flight, departing Thu, 1 Oct from Washington to London, returning Tue, 6 Oct, priced at S$949 found 4 days ago
Scandinavian Airlines
Thu, 1 Oct - Tue, 6 Oct
IAD
Washington
LHR
London
S$955 Return, found 4 days ago
S$955
Return
found 4 days ago
Select Scandinavian Airlines flight, departing Thu, 1 Oct from Washington to London, returning Tue, 6 Oct, priced at S$955 found 4 days ago
Scandinavian Airlines
Thu, 1 Oct - Tue, 6 Oct
IAD
Washington
LHR
London
S$959 Return, found 4 days ago
S$959
Return
found 4 days ago
Select Scandinavian Airlines flight, departing Thu, 1 Oct from Washington to London, returning Tue, 6 Oct, priced at S$959 found 4 days ago
United
Fri, 6 Nov - Mon, 16 Nov
IAD
Washington
LHR
London
S$1,155 Return, found 3 days ago
S$1,155
Return
found 3 days ago
Select United flight, departing Fri, 6 Nov from Washington to London, returning Mon, 16 Nov, priced at S$1,155 found 3 days ago
Swiss International Air Lines
Fri, 6 Nov - Mon, 16 Nov
IAD
Washington
LHR
London
S$1,167 Return, found 3 days ago
S$1,167
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Fri, 6 Nov from Washington to London, returning Mon, 16 Nov, priced at S$1,167 found 3 days ago
Delta
Thu, 1 Oct - Tue, 6 Oct
IAD
Washington
LHR
London
S$1,192 Return, found 4 days ago
S$1,192
Return
found 4 days ago
Select Delta flight, departing Thu, 1 Oct from Washington to London, returning Tue, 6 Oct, priced at S$1,192 found 4 days ago
Virgin Atlantic
Fri, 6 Nov - Mon, 16 Nov
IAD
Washington
LHR
London
S$1,193 Return, found 3 days ago
S$1,193
Return
found 3 days ago
Select Virgin Atlantic flight, departing Fri, 6 Nov from Washington to London, returning Mon, 16 Nov, priced at S$1,193 found 3 days ago
Lufthansa
Fri, 6 Nov - Mon, 16 Nov
IAD
Washington
LHR
London
S$1,194 Return, found 3 days ago
S$1,194
Return
found 3 days ago
Select Lufthansa flight, departing Fri, 6 Nov from Washington to London, returning Mon, 16 Nov, priced at S$1,194 found 3 days ago
Austrian Airlines
Thu, 1 Oct - Tue, 6 Oct
IAD
Washington
LHR
London
S$1,208 Return, found 4 days ago
S$1,208
Return
found 4 days ago
Select Austrian Airlines flight, departing Thu, 1 Oct from Washington to London, returning Tue, 6 Oct, priced at S$1,208 found 4 days ago

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

November is typically the cheapest month to fly

From S$827 - S$1,218 per traveller.

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 S$949. 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 kilometres 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.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Return price
S$948
Distance
5866 km
Average flight time
12 hours 29 mins

Book with confidence

Perfect flights from Washington to London

Your Journey from Washington to London

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With Expedia, you have access to a wide range of airlines, including Icelandair, Austrian Airlines, Brussels Airlines, Lufthansa, United, Virgin Atlantic, Delta, Air Canada, Scandinavian Airlines, Swiss International Air Lines. Our selection of flights from Washington Dulles Intl. to Heathrow 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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*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Washington to London

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