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

View AU$355 flight on Tue, 25 Nov. 2025Opens in a new window

Popular airlines from Washington to London

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Fri, 24 Oct. - Thu, 30 Oct.
IAD
Washington
LHR
London
AU$844 Return, found 3 days ago
AU$844
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Fri, 24 Oct. from Washington to London, returning Thu, 30 Oct., priced at AU$844 found 3 days ago
TAP Portugal
Sun, 7 Sep. - Tue, 16 Sep.
IAD
Washington
LHR
London
AU$918 Return, found 3 days ago
AU$918
Return
found 3 days ago
Select TAP Portugal flight, departing Sun, 7 Sep. from Washington to London, returning Tue, 16 Sep., priced at AU$918 found 3 days ago
Icelandair
Fri, 5 Sep. - Thu, 2 Oct.
IAD
Washington
LHR
London
AU$929 Return, found 5 days ago
AU$929
Return
found 5 days ago
Select Icelandair flight, departing Fri, 5 Sep. from Washington to London, returning Thu, 2 Oct., priced at AU$929 found 5 days ago
Icelandair
Mon, 13 Oct. - Fri, 31 Oct.
IAD
Washington
LGW
London
AU$930 Return, found 5 days ago
AU$930
Return
found 5 days ago
Select Icelandair flight, departing Mon, 13 Oct. from Washington to London, returning Fri, 31 Oct., priced at AU$930 found 5 days ago
Aer Lingus
Mon, 8 Sep. - Tue, 23 Sep.
IAD
Washington
LHR
London
AU$935 Return, found 2 days ago
AU$935
Return
found 2 days ago
Select Aer Lingus flight, departing Mon, 8 Sep. from Washington to London, returning Tue, 23 Sep., priced at AU$935 found 2 days ago
United
Tue, 20 Jan. - Tue, 10 Feb.
IAD
Washington
LHR
London
AU$951 Return, found 4 days ago
AU$951
Return
found 4 days ago
Select United flight, departing Tue, 20 Jan. from Washington to London, returning Tue, 10 Feb., priced at AU$951 found 4 days ago
Icelandair
Thu, 16 Oct. - Mon, 27 Oct.
BWI
Baltimore
LGW
London
AU$959 Return, found 2 days ago
AU$959
Return
found 2 days ago
Select Icelandair flight, departing Thu, 16 Oct. from Baltimore to London, returning Mon, 27 Oct., priced at AU$959 found 2 days ago
United
Sun, 7 Sep. - Tue, 16 Sep.
BWI
Baltimore
LHR
London
AU$964 Return, found 3 days ago
AU$964
Return
found 3 days ago
Select United flight, departing Sun, 7 Sep. from Baltimore to London, returning Tue, 16 Sep., priced at AU$964 found 3 days ago
Delta
Tue, 20 Jan. - Tue, 10 Feb.
IAD
Washington
LHR
London
AU$968 Return, found 4 days ago
AU$968
Return
found 4 days ago
Select Delta flight, departing Tue, 20 Jan. from Washington to London, returning Tue, 10 Feb., priced at AU$968 found 4 days ago
United
Sun, 7 Sep. - Tue, 16 Sep.
DCA
Washington
LHR
London
AU$984 Return, found 3 days ago
AU$984
Return
found 3 days ago
Select United flight, departing Sun, 7 Sep. from Washington to London, returning Tue, 16 Sep., priced at AU$984 found 3 days ago

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

February is typically the cheapest month to fly

From AU$515 - AU$1,055 per traveller.

Graph displaying average flight prices per month

Flight from Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Austrian Airlines, Delta, KLM, Lufthansa, Swiss International Air Lines, Virgin Atlantic
Return price
AU$844
Distance
5866 km

WAS to LON Flights

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Our user-friendly tools make it easier than ever to book WAS to LON flights, even if you’re hoping to hop aboard one of the last-minute flights leaving today. So whether you seek a spontaneous trip to this city’s hottest attractions, or prefer to plan out every detail of your adventure ahead of time, Expedia.com.au is here to help you find exactly what you are interested in.

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London Flight Deals

London

Washington to Heathrow
AU$843.78
Washington Airports

Washington

Washington Dulles Intl. to London
AU$843.78
Ronald Reagan Washington National to London
AU$983.50

Baltimore

*Available to Expedia members.