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

Return flights

02 Dec - 12 Dec	United
01 Dec - 17 Jan	United
02 Dec - 12 Jan	United
09 Dec - 22 Dec	KLM
06 Dec - 14 Dec	United
01 Dec - 14 Jan	United
14 Dec - 25 Dec	KLM
14 Dec - 21 Dec	KLM
05 Dec - 18 Dec	KLM
01 Dec - 18 Dec	Air Canada
01 Dec - 14 Dec	Air France
15 Dec - 12 Jan	United
06 Dec - 20 Dec	KLM
17 Dec - 07 Jan	United
12 Dec - 20 Dec	KLM
31 Dec - 10 Jan	Air France
29 Dec - 11 Jan	Iberia
24 Dec - 10 Jan	United
30 Dec - 10 Jan	Norse Atlantic Airways
13 Dec - 10 Jan	Air France

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 $887

Return flights