฿12,500 Cheap Icelandair flights from Washington to London (WAS→LON)

View ฿12,500 flight on Mon, 26 Jan 2026Opens in a new window
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Icelandair flights from Washington to London (WAS→LON)

Prices were available within the past 7 days and start at ฿12,500 for one-way flights and ฿17,025 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sun, 18 Jan - Tue, 27 Jan
IAD
Washington
LHR
London
฿17,025 Return, found 2 days ago
฿17,025
Return
found 2 days ago
Select Icelandair flight, departing Sun, 18 Jan from Washington to London, returning Tue, 27 Jan, priced at ฿17,025 found 2 days ago
Icelandair
Thu, 30 Apr - Thu, 7 May
IAD
Washington
LHR
London
฿18,030 Return, found 2 days ago
฿18,030
Return
found 2 days ago
Select Icelandair flight, departing Thu, 30 Apr from Washington to London, returning Thu, 7 May, priced at ฿18,030 found 2 days ago

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

February is typically the cheapest month to fly

From ฿10,614 - ฿24,373 per traveller.
Flight from Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Distance
5866 km
*Available to Expedia members.