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

Return flights

28 Sep - 05 Oct	JetSmart
26 Sep - 29 Sep	JetSmart
10 Sep - 24 Sep	JetSmart
01 Sep - 06 Sep	JetSmart
04 Sep - 08 Sep	JetSmart
01 Sep - 04 Sep	JetSmart
01 Sep - 05 Oct	JetSmart
25 Sep - 03 Oct	JetSmart
25 Sep - 02 Oct	JetSmart
11 Sep - 25 Sep	JetSmart
16 Sep - 25 Sep	JetSmart
15 Sep - 25 Sep	JetSmart
17 Sep - 25 Sep	JetSmart
02 Sep - 06 Sep	JetSmart
16 Sep - 02 Oct	JetSmart
16 Sep - 03 Oct	JetSmart
16 Sep - 04 Oct	JetSmart
29 Sep - 02 Oct	JetSmart
29 Sep - 03 Oct	JetSmart
29 Sep - 04 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 116€

Return flights