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

Return flights

07 Sep - 19 Sep	Aer Lingus
02 Sep - 30 Sep	Aer Lingus
02 Sep - 16 Sep	Aer Lingus
02 Sep - 25 Sep	Aer Lingus
14 Sep - 24 Sep	Aer Lingus
09 Sep - 23 Sep	Aer Lingus
21 Sep - 08 Oct	Aer Lingus
21 Sep - 10 Oct	Aer Lingus
22 Sep - 10 Oct	Aer Lingus
30 Sep - 08 Oct	Aer Lingus
03 Sep - 11 Sep	British Airways
03 Sep - 09 Sep	British Airways
01 Sep - 12 Sep	British Airways
06 Sep - 18 Sep	British Airways
27 Sep - 09 Oct	British Airways
24 Sep - 09 Oct	British Airways
24 Sep - 06 Oct	Air Canada
27 Sep - 08 Oct	British Airways
29 Sep - 13 Oct	Scandinavian Airlines
27 Sep - 10 Oct	British Airways

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 $504

Return flights