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

Return flights

05 Dec - 09 Dec	Delta
09 Dec - 21 Dec	KLM
03 Dec - 22 Dec	KLM
06 Dec - 14 Dec	United
07 Dec - 12 Dec	KLM
29 Dec - 12 Jan	United
31 Dec - 11 Jan	Air France
07 Dec - 20 Dec	KLM
08 Dec - 20 Dec	KLM
23 Dec - 08 Jan	United
24 Dec - 07 Jan	United
31 Dec - 10 Jan	Air France
28 Dec - 12 Jan	Air France
16 Dec - 26 Dec	Air France
28 Dec - 13 Jan	United
28 Dec - 14 Jan	Air France
30 Dec - 10 Jan	Norse Atlantic Airways
25 Dec - 12 Jan	Iberia
23 Dec - 31 Dec	United
19 Dec - 27 Dec	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 668€

Return flights