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

Return flights

12 Dec - 11 Jan	Norse Atlantic Airways
02 Dec - 12 Dec	Wizz Air Malta
09 Dec - 15 Dec	United
17 Dec - 30 Dec	Air France
17 Dec - 29 Dec	Air France
31 Dec - 10 Jan	Air Serbia
30 Dec - 10 Jan	ITA Airways
29 Dec - 10 Jan	Ryanair
24 Dec - 01 Jan	Delta
27 Dec - 09 Jan	Ryanair
20 Dec - 01 Jan	Delta
21 Dec - 01 Jan	Delta
31 Dec - 09 Jan	Air Serbia
18 Dec - 29 Dec	Air France
18 Dec - 02 Jan	Delta
22 Dec - 31 Dec	Delta
18 Dec - 27 Dec	Delta
20 Dec - 27 Dec	Air Serbia

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Cheapest return flights from Rome to San Juan in December from 577€

Return flights