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S$378 Cheap Flights from Washington to London

View S$378 flight on Sat, 2 Jan, 2027Opens in a new window

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$378 for one-way flights and S$1,002 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Tue, 1 Sept - Thu, 10 Sept
IAD
Washington
LHR
London
S$1,002 Return, found 3 days ago
S$1,002
Return
found 3 days ago
Select Icelandair flight, departing Tue, 1 Sept from Washington to London, returning Thu, 10 Sept, priced at S$1,002 found 3 days ago
Icelandair
Mon, 17 Aug - Mon, 24 Aug
IAD
Washington
LHR
London
S$1,004 Return, found 6 days ago
S$1,004
Return
found 6 days ago
Select Icelandair flight, departing Mon, 17 Aug from Washington to London, returning Mon, 24 Aug, priced at S$1,004 found 6 days ago
Icelandair
Sun, 23 Aug - Sun, 30 Aug
IAD
Washington
LHR
London
S$1,023 Return, found 9 hours ago
S$1,023
Return
found 9 hours ago
Select Icelandair flight, departing Sun, 23 Aug from Washington to London, returning Sun, 30 Aug, priced at S$1,023 found 9 hours ago
Icelandair
Tue, 18 Aug - Tue, 25 Aug
IAD
Washington
LHR
London
S$1,028 Return, found 6 days ago
S$1,028
Return
found 6 days ago
Select Icelandair flight, departing Tue, 18 Aug from Washington to London, returning Tue, 25 Aug, priced at S$1,028 found 6 days ago
Icelandair
Thu, 24 Sept - Tue, 15 Dec
IAD
Washington
LHR
London
S$1,051 Return, found 2 days ago
S$1,051
Return
found 2 days ago
Select Icelandair flight, departing Thu, 24 Sept from Washington to London, returning Tue, 15 Dec, priced at S$1,051 found 2 days ago
Icelandair
Tue, 18 Aug - Tue, 25 Aug
IAD
Washington
LHR
London
S$1,073 Return, found 6 days ago
S$1,073
Return
found 6 days ago
Select Icelandair flight, departing Tue, 18 Aug from Washington to London, returning Tue, 25 Aug, priced at S$1,073 found 6 days ago
Turkish Airlines
Thu, 24 Sept - Tue, 15 Dec
IAD
Washington
LHR
London
S$1,201 Return, found 2 days ago
S$1,201
Return
found 2 days ago
Select Turkish Airlines flight, departing Thu, 24 Sept from Washington to London, returning Tue, 15 Dec, priced at S$1,201 found 2 days ago
Virgin Atlantic
Sun, 23 Aug - Sun, 30 Aug
IAD
Washington
LHR
London
S$1,268 Return, found 9 hours ago
S$1,268
Return
found 9 hours ago
Select Virgin Atlantic flight, departing Sun, 23 Aug from Washington to London, returning Sun, 30 Aug, priced at S$1,268 found 9 hours ago
Brussels Airlines
Sun, 23 Aug - Sun, 30 Aug
IAD
Washington
LHR
London
S$1,282 Return, found 9 hours ago
S$1,282
Return
found 9 hours ago
Select Brussels Airlines flight, departing Sun, 23 Aug from Washington to London, returning Sun, 30 Aug, priced at S$1,282 found 9 hours ago
Finnair
Sun, 23 Aug - Sun, 30 Aug
IAD
Washington
LHR
London
S$1,294 Return, found 9 hours ago
S$1,294
Return
found 9 hours ago
Select Finnair flight, departing Sun, 23 Aug from Washington to London, returning Sun, 30 Aug, priced at S$1,294 found 9 hours ago

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$1,002. 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, United, Virgin Atlantic
Return price
S$1,001
Distance
5866 km
Average flight time
12 hours 27 mins

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Perfect flights 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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