Cheapest return flights from Seattle to London in August from 402€

AirHint found the following cheapest return flights from Seattle (SEA) to London (LHR) in August 2025 (see full year).

Return flights

20 Aug - 02 Sep Aer Lingus
10 Aug - 19 Aug Aer Lingus
06 Aug - 19 Aug Aer Lingus
13 Aug - 26 Aug Aer Lingus
20 Aug - 03 Sep Aer Lingus
12 Aug - 22 Aug Virgin Atlantic
04 Aug - 13 Aug Aer Lingus
12 Aug - 21 Aug Finnair
04 Aug - 14 Aug Finnair
20 Aug - 06 Sep Icelandair
20 Aug - 02 Sep Virgin Atlantic direct
27 Aug - 09 Sep Aer Lingus
06 Aug - 14 Aug British Airways direct
13 Aug - 20 Aug Delta
17 Aug - 21 Aug Icelandair
20 Aug - 10 Sep Virgin Atlantic
24 Aug - 02 Sep Air France
31 Aug - 06 Sep Icelandair
20 Aug - 08 Sep Aer Lingus
24 Aug - 02 Sep British Airways direct

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

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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