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

Return flights

08 Dec - 16 Dec	TAP
15 Dec - 20 Dec	Norse Atlantic Airways
01 Dec - 12 Dec	KLM
15 Dec - 21 Dec	Norse Atlantic Airways
31 Dec - 09 Jan	Iberia
11 Dec - 20 Dec	Air France
25 Dec - 08 Jan	Lufthansa
24 Dec - 09 Jan	Iberia
25 Dec - 09 Jan	Wizz Air Malta
31 Dec - 12 Jan	Lufthansa
25 Dec - 07 Jan	United
31 Dec - 07 Jan	Iberia
25 Dec - 01 Jan	Delta
26 Dec - 01 Jan	Delta
26 Dec - 11 Jan	Delta
20 Dec - 29 Dec	Delta

Also check the deals for one-way flights from Rome to San Juan 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 Juan in December from 649€

Return flights