AirHint found the following cheapest return flights from Athens (ATH) to Buenos Aires (AEP) in December 2025 (see full year).

Return flights

04 Dec - 07 Dec	LATAM Airlines Group
01 Dec - 15 Dec	LATAM Airlines Group
05 Dec - 14 Dec	Lufthansa
15 Dec - 16 Jan	LATAM Airlines Group
24 Dec - 25 Jan	Lufthansa
17 Dec - 24 Dec	SWISS
27 Dec - 07 Jan	SWISS
06 Dec - 10 Dec	SWISS
24 Dec - 24 Jan	Lufthansa
05 Dec - 20 Dec	Lufthansa
29 Dec - 09 Jan	SWISS
24 Dec - 16 Jan	SWISS
25 Dec - 16 Jan	SWISS
27 Dec - 09 Jan	SWISS
06 Dec - 19 Dec	SWISS
22 Dec - 06 Jan	SWISS
01 Dec - 06 Jan	SWISS
01 Dec - 04 Dec	SWISS

Also check the deals for one-way flights from Athens 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 Athens to Buenos Aires in December from $983

Return flights