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

Return flights

10 Sep - 17 Sep	Condor	direct
16 Sep - 23 Sep	Condor	direct
17 Sep - 24 Sep	Condor	direct
18 Sep - 25 Sep	Condor	direct
12 Sep - 19 Sep	Condor	direct
07 Sep - 23 Sep	Condor	direct
09 Sep - 16 Sep	Condor
07 Sep - 11 Sep	Condor	direct
07 Sep - 12 Sep	Condor	direct
02 Sep - 16 Sep	Condor
23 Sep - 21 Oct	Condor	direct
29 Sep - 15 Oct	Condor	direct
24 Sep - 15 Oct	Condor	direct
30 Sep - 07 Oct	Condor	direct
21 Sep - 19 Oct	Condor	direct
24 Sep - 01 Oct	Condor
25 Sep - 02 Oct	Condor
29 Sep - 06 Oct	Condor
14 Sep - 04 Oct	Condor
30 Sep - 13 Oct	Condor	direct

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 478€

Return flights