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

Return flights

31 Dec - 11 Jan	United
21 Dec - 27 Dec	Air France
21 Dec - 28 Dec	Air France
17 Dec - 10 Jan	Air France
26 Dec - 08 Jan	United
20 Dec - 27 Dec	Iberia
22 Dec - 06 Jan	British Airways
27 Dec - 06 Jan	Iberia
21 Dec - 05 Jan	Air France
25 Dec - 03 Jan	Iberia
25 Dec - 05 Jan	United
26 Dec - 09 Jan	United
26 Dec - 07 Jan	Iberia

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 996€

Return flights