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

Return flights

04 Dec - 07 Dec	Avianca	direct
04 Dec - 11 Dec	Avianca
04 Dec - 09 Dec	Avianca	direct
05 Dec - 08 Dec	Avianca	direct
30 Dec - 17 Jan	Avianca
25 Dec - 02 Jan	Copa
24 Dec - 07 Jan	Copa
04 Dec - 10 Dec	Spirit Airlines
03 Dec - 12 Dec	Avianca
06 Dec - 10 Dec	Spirit Airlines
08 Dec - 10 Dec	Spirit Airlines
07 Dec - 10 Dec	Spirit Airlines
24 Dec - 07 Jan	Avianca	direct
19 Dec - 01 Jan	Copa
04 Dec - 12 Dec	Spirit Airlines
25 Dec - 03 Jan	Avianca	direct
25 Dec - 02 Jan	Avianca	direct
29 Dec - 03 Jan	Avianca
30 Dec - 04 Jan	Avianca
29 Dec - 02 Jan	Avianca

Also check the deals for one-way flights from Rio Negro 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.

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Cheapest return flights from Rio Negro to San Juan in December from 171€

Return flights