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

Return flights

15 Dec - 31 Dec	Copa
01 Dec - 06 Dec	Copa
15 Dec - 15 Jan	Copa
30 Dec - 08 Jan	Copa
03 Dec - 12 Dec	Copa
01 Dec - 06 Dec	jetBlue	direct
25 Dec - 29 Dec	Copa
03 Dec - 08 Dec	Copa
03 Dec - 08 Dec	Avianca	direct
03 Dec - 12 Dec	Avianca	direct
23 Dec - 30 Dec	Copa
26 Dec - 06 Jan	Copa
27 Dec - 03 Jan	Copa
23 Dec - 30 Dec	Avianca	direct
15 Dec - 03 Jan	Spirit Airlines
25 Dec - 10 Jan	Spirit Airlines
25 Dec - 03 Jan	Spirit Airlines
25 Dec - 06 Jan	Spirit Airlines
30 Dec - 18 Jan	Spirit Airlines
25 Dec - 08 Jan	Spirit Airlines

Also check the deals for one-way flights from San Juan to Rio Negro 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 San Juan to Rio Negro in December from 213€

Return flights