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

Return flights

23 Sep - 07 Oct	Aer Lingus
16 Sep - 24 Sep	Aer Lingus
15 Sep - 25 Sep	Aer Lingus
16 Sep - 23 Sep	Aer Lingus
30 Sep - 15 Oct	Aer Lingus
10 Sep - 24 Sep	Condor
08 Sep - 17 Sep	Condor
07 Sep - 09 Sep	Condor
20 Sep - 21 Oct	Scandinavian Airlines
10 Sep - 21 Sep	Condor
29 Sep - 06 Oct	Aer Lingus
23 Sep - 18 Oct	Iberia
01 Sep - 12 Sep	Condor
29 Sep - 12 Oct	Condor
25 Sep - 07 Oct	Condor
24 Sep - 18 Oct	Iberia
17 Sep - 22 Sep	Condor
23 Sep - 30 Sep	Condor
24 Sep - 09 Oct	Condor
25 Sep - 06 Oct	Condor

Also check the deals for one-way flights from San Francisco to Rome 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 Rome in September from 430€

Return flights