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

Return flights

28 Sep - 16 Oct	JetSmart
28 Sep - 17 Oct	JetSmart
29 Sep - 15 Oct	Clic Air
28 Sep - 19 Oct	JetSmart
28 Sep - 03 Oct	JetSmart
28 Sep - 12 Oct	JetSmart
29 Sep - 16 Oct	Clic Air
28 Sep - 08 Oct	JetSmart
28 Sep - 15 Oct	JetSmart
22 Sep - 29 Sep	Wingo
19 Sep - 03 Oct	Copa
19 Sep - 25 Sep	JetSmart
23 Sep - 26 Sep	JetSmart
22 Sep - 25 Sep	JetSmart
19 Sep - 29 Sep	JetSmart
21 Sep - 25 Sep	Copa
21 Sep - 29 Sep	JetSmart
21 Sep - 22 Sep	Copa

Also check the deals for one-way flights from Cali 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 Cali to Buenos Aires in September from $643

Return flights