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

Return flights

09 Dec - 16 Dec	Lufthansa
09 Dec - 15 Dec	Lufthansa
30 Dec - 20 Jan	Lufthansa
27 Dec - 13 Jan	Scandinavian Airlines
11 Dec - 16 Dec	Hawaiian Airlines
08 Dec - 14 Dec	TAP
05 Dec - 15 Dec	Lufthansa
29 Dec - 09 Jan	Scandinavian Airlines
11 Dec - 14 Jan	Hawaiian Airlines
12 Dec - 25 Jan	Frontier Airlines
26 Dec - 09 Jan	Scandinavian Airlines
27 Dec - 10 Jan	Scandinavian Airlines
12 Dec - 11 Jan	Frontier Airlines
11 Dec - 15 Dec	Hawaiian Airlines
13 Dec - 22 Dec	Frontier Airlines
24 Dec - 10 Jan	Frontier Airlines
16 Dec - 11 Jan	Aer Lingus
04 Dec - 26 Dec	WestJet
01 Dec - 30 Dec	TAP
16 Dec - 30 Dec	Aer Lingus

Also check the deals for one-way flights from San Francisco to Rome in December.

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 December from 538€

Return flights