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

Return flights

19 Sep - 26 Sep	LATAM Airlines Group
10 Sep - 30 Sep	LATAM Airlines Group
15 Sep - 30 Sep	LATAM Airlines Group
09 Sep - 09 Oct	Aerolineas Argentinas
15 Sep - 17 Oct	Turkish Airlines
02 Sep - 24 Sep	LATAM Airlines Group
15 Sep - 03 Oct	Emirates
17 Sep - 01 Oct	Emirates

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 $1820

Return flights