AirHint found the following cheapest return flights from Rome (ROM) to San Jose (SJO) in December 2025 (see full year).

Return flights

08 Dec - 20 Dec	Air France
01 Dec - 10 Dec	Delta
02 Dec - 22 Dec	Air France
04 Dec - 14 Dec	United
02 Dec - 12 Dec	United
06 Dec - 14 Dec	United
04 Dec - 13 Dec	Air Canada
05 Dec - 14 Dec	United
06 Dec - 13 Dec	Air Canada
29 Dec - 17 Jan	United
15 Dec - 21 Dec	Air France
29 Dec - 11 Jan	Iberia
26 Dec - 20 Jan	United
31 Dec - 10 Jan	Air France
27 Dec - 08 Jan	Iberia
25 Dec - 10 Jan	Air France
28 Dec - 10 Jan	Air France
28 Dec - 09 Jan	Air France
24 Dec - 05 Jan	Air France
27 Dec - 10 Jan	KLM

Also check the deals for one-way flights from Rome to San Jose 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 Rome to San Jose in December from $771

Return flights