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

Return flights

03 Dec - 10 Dec	Copa
04 Dec - 11 Dec	Copa
05 Dec - 07 Dec	Copa
03 Dec - 12 Dec	Copa
10 Dec - 16 Dec	Copa
11 Dec - 16 Dec	Copa
02 Dec - 09 Dec	Copa
12 Dec - 13 Dec	Copa
11 Dec - 15 Dec	Copa
10 Dec - 15 Dec	Copa
13 Dec - 12 Jan	Avianca	direct
15 Dec - 15 Jan	Avianca
20 Dec - 03 Jan	Avianca	direct
29 Dec - 26 Jan	Frontier Airlines
31 Dec - 05 Jan	Avianca	direct
27 Dec - 11 Jan	Arajet
30 Dec - 03 Jan	Copa
31 Dec - 20 Jan	Spirit Airlines
25 Dec - 03 Jan	jetBlue
30 Dec - 05 Jan	Copa

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 194€

Return flights