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

Return flights

02 Sep - 16 Sep	Condor	direct
30 Sep - 14 Oct	Condor	direct
08 Sep - 14 Sep	Condor
21 Sep - 05 Oct	Condor	direct
26 Sep - 09 Oct	Condor	direct
10 Sep - 17 Sep	TAP
16 Sep - 29 Sep	Condor
08 Sep - 14 Sep	Condor	direct
11 Sep - 28 Sep	Condor	direct
05 Sep - 19 Sep	Condor
16 Sep - 29 Sep	Condor	direct
10 Sep - 17 Sep	Lufthansa	direct
03 Sep - 10 Sep	United	direct
24 Sep - 01 Oct	Lufthansa	direct
30 Sep - 07 Oct	United
23 Sep - 11 Oct	Hawaiian Airlines
27 Sep - 04 Oct	Lufthansa	direct
23 Sep - 11 Oct	Lufthansa	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 486€

Return flights