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 - 15 Jan	Avianca	direct
16 Dec - 24 Dec	Avianca	direct
16 Dec - 15 Jan	Avianca	direct
10 Dec - 17 Dec	Avianca	direct
09 Dec - 11 Dec	Avianca	direct
09 Dec - 12 Dec	Avianca	direct
13 Dec - 16 Dec	Avianca
13 Dec - 17 Dec	Avianca
11 Dec - 15 Dec	Avianca
09 Dec - 13 Dec	Avianca	direct
12 Dec - 16 Dec	Avianca	direct
11 Dec - 16 Dec	Avianca
18 Dec - 18 Jan	Avianca	direct
28 Dec - 15 Jan	Spirit Airlines
31 Dec - 07 Jan	Avianca
28 Dec - 16 Jan	Spirit Airlines
29 Dec - 15 Jan	Spirit Airlines
29 Dec - 19 Jan	Spirit Airlines
30 Dec - 19 Jan	Spirit Airlines
29 Dec - 16 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 $163

Return flights