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

Return flights

07 Sep - 23 Sep	LATAM Airlines Group
06 Sep - 19 Sep	LATAM Airlines Group
02 Sep - 03 Oct	LATAM Airlines Group
25 Sep - 22 Oct	LATAM Airlines Group
05 Sep - 19 Sep	LATAM Airlines Group
02 Sep - 22 Sep	LATAM Airlines Group
02 Sep - 19 Sep	LATAM Airlines Group
02 Sep - 21 Sep	LATAM Airlines Group
05 Sep - 18 Sep	LATAM Airlines Group
04 Sep - 01 Oct	LATAM Airlines Group
04 Sep - 19 Sep	LATAM Airlines Group
22 Sep - 06 Oct	LATAM Airlines Group
05 Sep - 12 Sep	Aerolineas Argentinas
30 Sep - 21 Oct	JetSmart
20 Sep - 31 Oct	LATAM Airlines Group
15 Sep - 29 Sep	LATAM Airlines Group
17 Sep - 01 Oct	LATAM Airlines Group

Also check the deals for one-way flights from Buenos Aires to Sydney 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 Sydney in September from 1439€

Return flights