Cheapest return flights from Seattle to London in August from 500€

AirHint found the following cheapest return flights from Seattle (SEA) to London (LHR) in August 2026 (see full year).

Return flights

12 Aug - 03 Sep Aer Lingus
18 Aug - 01 Sep Air Canada
05 Aug - 25 Aug Lufthansa
09 Aug - 26 Aug Aer Lingus
12 Aug - 26 Aug Aer Lingus
16 Aug - 24 Aug Scandinavian Airlines
15 Aug - 22 Aug Scandinavian Airlines
05 Aug - 25 Aug KLM direct
12 Aug - 01 Sep Virgin Atlantic direct
08 Aug - 11 Aug Scandinavian Airlines
08 Aug - 01 Sep Aer Lingus
08 Aug - 28 Aug Finnair
16 Aug - 23 Aug Air France
21 Aug - 29 Aug Delta
08 Aug - 01 Sep British Airways direct
27 Aug - 13 Sep Air France direct
28 Aug - 06 Sep Delta
27 Aug - 03 Sep Icelandair
28 Aug - 06 Sep Alaska Airlines direct

Also check the deals for one-way flights from Seattle to London in August.

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