Cheapest return SEA–STN flights, August

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

Return flights

11 Aug - 26 Aug Icelandair
25 Aug - 05 Sep Icelandair
01 Aug - 30 Sep Icelandair
28 Aug - 02 Sep Icelandair
14 Aug - 29 Aug Icelandair
08 Aug - 01 Sep Icelandair
18 Aug - 31 Aug Icelandair
11 Aug - 25 Aug Icelandair
18 Aug - 24 Aug Icelandair
17 Aug - 21 Aug Icelandair
16 Aug - 23 Aug Icelandair
26 Aug - 13 Sep Icelandair
09 Aug - 26 Aug Icelandair
14 Aug - 23 Aug Icelandair

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

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