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

Return flights

07 Sep - 14 Sep	Qantas
29 Sep - 27 Oct	Qatar Airways
08 Sep - 15 Sep	Qantas
01 Sep - 30 Sep	Qantas
25 Sep - 30 Oct	Qatar Airways
18 Sep - 02 Oct	Qatar Airways
27 Sep - 25 Oct	Qatar Airways
05 Sep - 03 Oct	Jetstar

Also check the deals for one-way flights from Perth 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 Perth to Buenos Aires in September from 1509€

Return flights