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

Return flights

02 Sep - 14 Sep	Qantas
01 Sep - 17 Sep	LATAM Airlines Group
03 Sep - 10 Sep	LATAM Airlines Group
29 Sep - 16 Oct	LATAM Airlines Group
07 Sep - 05 Oct	Qantas
27 Sep - 16 Oct	LATAM Airlines Group
01 Sep - 02 Oct	LATAM Airlines Group
14 Sep - 21 Sep	LATAM Airlines Group
28 Sep - 16 Oct	LATAM Airlines Group
26 Sep - 16 Oct	Qantas
21 Sep - 23 Oct	LATAM Airlines Group
04 Sep - 25 Sep	LATAM Airlines Group
14 Sep - 15 Oct	LATAM Airlines Group
30 Sep - 16 Oct	LATAM Airlines Group
20 Sep - 05 Oct	LATAM Airlines Group
15 Sep - 22 Sep	Emirates
15 Sep - 15 Sep	Jetstar
10 Sep - 24 Sep	Emirates

Also check the deals for one-way flights from Sydney 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 Sydney to Buenos Aires in September from $1338

Return flights