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

Return flights

09 Sep - 10 Sep	Condor
16 Sep - 30 Sep	Condor
02 Sep - 08 Sep	Condor
11 Sep - 25 Sep	Condor	direct
08 Sep - 15 Sep	Condor
10 Sep - 17 Sep	Condor
08 Sep - 15 Sep	Condor	direct
26 Sep - 31 Oct	Condor
12 Sep - 25 Oct	Condor
13 Sep - 20 Sep	Condor
28 Sep - 04 Oct	Condor
16 Sep - 30 Sep	Condor	direct
02 Sep - 08 Sep	Condor	direct
29 Sep - 14 Oct	Air Canada
30 Sep - 07 Oct	Lufthansa	direct
26 Sep - 31 Oct	Lufthansa	direct
26 Sep - 11 Oct	Air Canada
27 Sep - 04 Oct	Lufthansa	direct
12 Sep - 25 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 470€

Return flights