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

Return flights

28 Sep - 03 Oct	JetSmart
27 Sep - 03 Oct	JetSmart
25 Sep - 03 Oct	Aerolineas Argentinas
29 Sep - 03 Oct	JetSmart
26 Sep - 03 Oct	JetSmart
29 Sep - 02 Oct	JetSmart
16 Sep - 03 Oct	JetSmart
30 Sep - 03 Oct	JetSmart
13 Sep - 03 Oct	JetSmart
16 Sep - 02 Oct	JetSmart
18 Sep - 30 Sep	Aerolineas Argentinas
03 Sep - 10 Sep	Flybondi
01 Sep - 05 Sep	JetSmart
07 Sep - 26 Sep	JetSmart
05 Sep - 09 Sep	Flybondi
18 Sep - 23 Sep	Aerolineas Argentinas
05 Sep - 06 Sep	Flybondi
25 Sep - 27 Sep	Aerolineas Argentinas
07 Sep - 11 Sep	JetSmart
16 Sep - 26 Sep	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 $184

Return flights