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

Return flights

12 Sep - 25 Sep	KLM
17 Sep - 24 Sep	KLM
11 Sep - 17 Sep	Pegasus Airlines
09 Sep - 22 Sep	Qatar Airways
25 Sep - 02 Oct	AJet
30 Sep - 07 Oct	Qatar Airways
18 Sep - 18 Oct	Qatar Airways
08 Sep - 23 Sep	Qatar Airways
05 Sep - 30 Sep	AJet
17 Sep - 21 Sep	AJet
12 Sep - 19 Sep	Pegasus Airlines
02 Sep - 01 Oct	Pegasus Airlines
02 Sep - 08 Sep	Pegasus Airlines
01 Sep - 15 Sep	Qatar Airways
21 Sep - 04 Oct	KLM

Also check the deals for one-way flights from Istanbul to Buenos Aires in September.

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 September from 973€

Return flights