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

Return flights

06 Dec - 10 Dec	Avianca	direct
09 Dec - 12 Dec	Avianca	direct
03 Dec - 12 Dec	Avianca
16 Dec - 17 Jan	Avianca	direct
16 Dec - 16 Jan	Avianca	direct
03 Dec - 10 Dec	Avianca
15 Dec - 15 Jan	Avianca	direct
15 Dec - 18 Dec	Copa
15 Dec - 20 Dec	jetBlue	direct
04 Dec - 07 Dec	Avianca
16 Dec - 18 Jan	Avianca	direct
11 Dec - 16 Dec	Avianca
04 Dec - 08 Dec	Avianca
05 Dec - 15 Dec	jetBlue	direct
16 Dec - 15 Jan	Avianca
17 Dec - 16 Jan	jetBlue	direct
14 Dec - 14 Jan	Avianca	direct
21 Dec - 16 Jan	Avianca	direct
18 Dec - 18 Jan	jetBlue	direct
18 Dec - 16 Jan	jetBlue	direct

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 $165

Return flights