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

Return flights

05 Sep - 08 Sep	JetSmart
09 Sep - 15 Sep	JetSmart
06 Sep - 11 Sep	JetSmart
06 Sep - 15 Sep	JetSmart
06 Sep - 08 Sep	JetSmart
12 Sep - 15 Sep	JetSmart
03 Sep - 25 Sep	JetSmart
01 Sep - 11 Sep	JetSmart
01 Sep - 04 Sep	JetSmart
01 Sep - 15 Sep	JetSmart
28 Sep - 09 Oct	Aerolineas Argentinas
18 Sep - 03 Oct	Aerolineas Argentinas
24 Sep - 01 Oct	JetSmart
30 Sep - 09 Oct	JetSmart
29 Sep - 18 Oct	JetSmart
29 Sep - 02 Oct	JetSmart
28 Sep - 18 Oct	JetSmart
30 Sep - 18 Oct	JetSmart
12 Sep - 02 Oct	JetSmart
24 Sep - 09 Oct	JetSmart

Also check the deals for one-way flights from Buenos Aires to Santiago 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 Buenos Aires to Santiago in September from $174

Return flights