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Swiss International Air Lines Cheap Flights from Washington to London

View €288 flight on Sun, 3 Jan 2027Opens in a new window

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Prices were available within the past 7 days and start at €288 for one-way flights and €742 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Sun, 11 Oct - Tue, 20 Oct
IAD
Washington
LHR
London
€742 Return, just found
€742
Return
just found
Select Swiss International Air Lines flight, departing Sun, 11 Oct from Washington to London, returning Tue, 20 Oct, priced at €742 just found
Swiss International Air Lines
Mon, 5 Oct - Tue, 13 Oct
IAD
Washington
LCY
London
€759 Return, found 1 day ago
€759
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 5 Oct from Washington to London, returning Tue, 13 Oct, priced at €759 found 1 day ago
Swiss International Air Lines
Sun, 11 Oct - Tue, 20 Oct
IAD
Washington
LCY
London
€949 Return, found 22 hours ago
€949
Return
found 22 hours ago
Select Swiss International Air Lines flight, departing Sun, 11 Oct from Washington to London, returning Tue, 20 Oct, priced at €949 found 22 hours ago
Swiss International Air Lines
Sun, 11 Oct - Tue, 20 Oct
IAD
Washington
LCY
London
€1,018 Return, found 22 hours ago
€1,018
Return
found 22 hours ago
Select Swiss International Air Lines flight, departing Sun, 11 Oct from Washington to London, returning Tue, 20 Oct, priced at €1,018 found 22 hours ago
Swiss International Air Lines
Mon, 5 Oct - Tue, 13 Oct
IAD
Washington
LCY
London
€1,213 Return, found 1 day ago
€1,213
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 5 Oct from Washington to London, returning Tue, 13 Oct, priced at €1,213 found 1 day ago
Swiss International Air Lines
Mon, 5 Oct - Tue, 13 Oct
IAD
Washington
LCY
London
€1,238 Return, found 1 day ago
€1,238
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 5 Oct from Washington to London, returning Tue, 13 Oct, priced at €1,238 found 1 day ago

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

October is typically the cheapest month to fly

From €465 - €676 per traveller.

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Heathrow
Distance
5799 km
*Available to Expedia members.