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

Return flights

08 Dec - 12 Dec	Norse Atlantic Airways
08 Dec - 08 Jan	Norse Atlantic Airways
04 Dec - 10 Dec	Norse Atlantic Airways
08 Dec - 14 Dec	Norse Atlantic Airways
07 Dec - 16 Dec	United
06 Dec - 13 Dec	United
31 Dec - 09 Jan	Iberia
31 Dec - 10 Jan	Scandinavian Airlines
15 Dec - 21 Dec	Delta
29 Dec - 30 Jan	Ryanair
29 Dec - 10 Jan	Ryanair
30 Dec - 10 Jan	Ryanair
13 Dec - 20 Dec	Delta
31 Dec - 11 Jan	Iberia
31 Dec - 08 Jan	Lufthansa
25 Dec - 10 Jan	Wizz Air Malta
24 Dec - 01 Jan	Delta
23 Dec - 30 Dec	United
18 Dec - 29 Dec	United
17 Dec - 27 Dec	Air France

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 576€

Return flights