AirHint found the following cheapest return flights from Rio De Janeiro (SDU) to Buenos Aires (AEP) in December 2025 (see full year).

Return flights

01 Dec - 03 Dec	LATAM Airlines Group
02 Dec - 13 Dec	LATAM Airlines Group
09 Dec - 16 Dec	LATAM Airlines Group
12 Dec - 14 Dec	LATAM Airlines Group
02 Dec - 14 Dec	LATAM Airlines Group
13 Dec - 14 Dec	LATAM Airlines Group
11 Dec - 14 Dec	Azul Airlines
02 Dec - 08 Dec	Azul Airlines
03 Dec - 10 Dec	Azul Airlines
02 Dec - 10 Dec	Azul Airlines
21 Dec - 11 Jan	LATAM Airlines Group
22 Dec - 04 Jan	LATAM Airlines Group
30 Dec - 02 Jan	LATAM Airlines Group
29 Dec - 03 Jan	LATAM Airlines Group

Also check the deals for one-way flights from Rio De Janeiro to Buenos Aires 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 De Janeiro to Buenos Aires in December from $309

Return flights