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

Return flights

02 Dec - 10 Dec	British Airways
01 Dec - 07 Dec	KLM
06 Dec - 13 Dec	Turkish Airlines
01 Dec - 12 Dec	Turkish Airlines
28 Dec - 01 Jan	Turkish Airlines
27 Dec - 17 Jan	Turkish Airlines
17 Dec - 04 Jan	Turkish Airlines
22 Dec - 03 Jan	Turkish Airlines
27 Dec - 04 Jan	Turkish Airlines
27 Dec - 03 Jan	Turkish Airlines
21 Dec - 03 Jan	Turkish Airlines
25 Dec - 03 Jan	Turkish Airlines
20 Dec - 04 Jan	Turkish Airlines
20 Dec - 28 Dec	Turkish Airlines
20 Dec - 03 Jan	Turkish Airlines
02 Dec - 21 Dec	Vueling Airlines
24 Dec - 31 Dec	Qatar Airways
01 Dec - 10 Dec	KLM

Also check the deals for one-way flights from Istanbul 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 Istanbul to Buenos Aires in December from 910€

Return flights