฿22,040 Cheap British Airways flights from Seattle to London (SEA→LON)

View ฿22,040 flight on Mon, 16 Mar 2026Opens in a new window

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British Airways flights from Seattle to London (SEA→LON)

Prices were available within the past 7 days and start at ฿22,040 for one-way flights and ฿42,150 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, 7 Jul - Tue, 14 Jul
SEA
Seattle
LHR
London
฿42,150 Return, found 1 day ago
฿42,150
Return
found 1 day ago
Select British Airways flight, departing Tue, 7 Jul from Seattle to London, returning Tue, 14 Jul, priced at ฿42,150 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to London (LON)

October is typically the cheapest month to fly

From ฿15,398 - ฿28,920 per traveller.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Distance
7657 km
*Available to Expedia members.