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

Return flights

22 Sep - 08 Oct	Condor	direct
23 Sep - 08 Oct	Condor	direct
21 Sep - 07 Oct	Condor	direct
30 Sep - 14 Oct	Condor	direct
30 Sep - 20 Oct	Condor	direct
24 Sep - 08 Oct	Condor	direct
24 Sep - 15 Oct	Condor	direct
16 Sep - 07 Oct	Condor	direct
14 Sep - 19 Sep	Condor	direct
29 Sep - 25 Oct	Condor
22 Sep - 25 Sep	Condor	direct
25 Sep - 29 Sep	Condor
18 Sep - 24 Sep	Condor	direct
10 Sep - 17 Sep	Condor	direct
10 Sep - 24 Sep	Condor	direct
12 Sep - 25 Sep	Condor	direct
14 Sep - 04 Oct	Condor
14 Sep - 21 Sep	Condor
13 Sep - 20 Sep	Condor
24 Sep - 28 Sep	Hawaiian Airlines

Also check the deals for one-way flights from San Francisco to Frankfurt 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 Frankfurt in September from $576

Return flights