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

Return flights

09 Dec - 16 Dec	Brussels Airlines
09 Dec - 14 Dec	KLM
04 Dec - 09 Dec	Lufthansa
07 Dec - 14 Dec	Lufthansa
31 Dec - 09 Jan	United
04 Dec - 23 Dec	United
29 Dec - 08 Jan	United
13 Dec - 25 Dec	Lufthansa
30 Dec - 07 Jan	Lufthansa
16 Dec - 26 Dec	United
31 Dec - 06 Jan	Lufthansa
31 Dec - 05 Jan	Lufthansa
20 Dec - 11 Jan	Frontier Airlines
20 Dec - 10 Jan	Frontier Airlines
28 Dec - 04 Jan	Lufthansa
23 Dec - 04 Jan	Frontier Airlines
19 Dec - 11 Jan	Frontier Airlines
17 Dec - 30 Dec	WestJet
19 Dec - 22 Dec	United

Also check the deals for one-way flights from San Diego 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.

Book a cheap hotel in Rome

Cheap car rent in Rome

Cheapest return flights from San Diego to Rome in December from 352€

Return flights