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

Return flights

18 Aug - 25 Aug	Scandinavian Airlines
18 Aug - 23 Aug	Icelandair
20 Aug - 27 Aug	Scandinavian Airlines
31 Aug - 07 Sep	Scandinavian Airlines
19 Aug - 26 Aug	Icelandair
17 Aug - 24 Aug	Scandinavian Airlines
27 Aug - 03 Sep	Scandinavian Airlines
12 Aug - 19 Aug	Icelandair
13 Aug - 20 Aug	Icelandair
08 Aug - 21 Aug	Icelandair
21 Aug - 28 Aug	Icelandair
06 Aug - 13 Aug	Icelandair
26 Aug - 02 Sep	Icelandair
29 Aug - 05 Sep	Icelandair
30 Aug - 06 Sep	Icelandair
28 Aug - 04 Sep	Icelandair

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

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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Cheapest return flights from Seattle to Stockholm in August from $398

Return flights