AirHint found the following cheapest return flights from San Francisco (SFO) to Stockholm (ARN) in September 2025 (see full year).

Return flights

09 Sep - 16 Sep	SWISS
03 Sep - 10 Sep	United
30 Sep - 07 Oct	United
17 Sep - 24 Sep	United
24 Sep - 01 Oct	United
07 Sep - 14 Sep	United
01 Sep - 08 Sep	United
11 Sep - 18 Sep	United
15 Sep - 22 Sep	United
27 Sep - 04 Oct	Scandinavian Airlines
19 Sep - 26 Sep	United
21 Sep - 28 Sep	United
13 Sep - 20 Sep	Scandinavian Airlines

Also check the deals for one-way flights from San Francisco to Stockholm in September.

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 San Francisco to Stockholm in September from 421€

Return flights