AirHint found the following cheapest return flights from Foz Do Iguacu (IGU) to Buenos Aires (AEP) in September 2025 (see full year).

Return flights

25 Sep - 28 Sep	JetSmart
26 Sep - 28 Sep	JetSmart
25 Sep - 04 Oct	JetSmart
07 Sep - 28 Sep	JetSmart
05 Sep - 07 Sep	JetSmart
26 Sep - 04 Oct	JetSmart
12 Sep - 28 Sep	JetSmart
04 Sep - 07 Sep	JetSmart
23 Sep - 25 Sep	LATAM Airlines Group
04 Sep - 08 Sep	JetSmart
06 Sep - 09 Sep	GOL Linhas Aéreas
05 Sep - 09 Sep	GOL Linhas Aéreas
18 Sep - 04 Oct	JetSmart

Also check the deals for one-way flights from Foz Do Iguacu 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 Foz Do Iguacu to Buenos Aires in September from 244€

Return flights