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

Return flights

02 Dec - 15 Dec	KLM
04 Dec - 07 Dec	Delta
10 Dec - 13 Jan	Delta
01 Dec - 10 Dec	KLM
10 Dec - 23 Dec	Delta
01 Dec - 12 Dec	KLM
02 Dec - 12 Dec	KLM
01 Dec - 14 Dec	United
12 Dec - 13 Jan	United
31 Dec - 13 Jan	Ryanair
08 Dec - 21 Dec	United
31 Dec - 12 Jan	Ryanair
05 Dec - 17 Dec	Air France
12 Dec - 22 Dec	Air France
24 Dec - 11 Jan	United
24 Dec - 07 Jan	United
25 Dec - 08 Jan	United
28 Dec - 15 Jan	Iberia
29 Dec - 07 Jan	United
10 Dec - 01 Jan	Delta

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 679€

Return flights