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

Return flights

07 Dec - 09 Dec	Norse Atlantic Airways
03 Dec - 09 Dec	TAP
05 Dec - 11 Dec	Lufthansa
08 Dec - 12 Dec	TAP
06 Dec - 13 Dec	Aer Lingus
15 Dec - 20 Dec	Norse Atlantic Airways
31 Dec - 09 Jan	Iberia
24 Dec - 07 Jan	Iberia
25 Dec - 09 Jan	Iberia
24 Dec - 06 Jan	Iberia
24 Dec - 01 Jan	United
29 Dec - 06 Jan	British Airways
26 Dec - 11 Jan	Delta
22 Dec - 30 Dec	Air France
27 Dec - 09 Jan	Iberia
26 Dec - 01 Jan	Delta
26 Dec - 10 Jan	KLM
22 Dec - 31 Dec	Delta
21 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 $665

Return flights