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

Return flights

05 Sep - 16 Sep	LATAM Airlines Group
09 Sep - 16 Sep	Qantas
04 Sep - 18 Sep	LATAM Airlines Group
05 Sep - 07 Sep	LATAM Airlines Group
06 Sep - 12 Sep	Qantas
05 Sep - 23 Sep	LATAM Airlines Group
01 Sep - 01 Oct	LATAM Airlines Group
02 Sep - 09 Sep	Qantas
01 Sep - 25 Sep	LATAM Airlines Group
26 Sep - 03 Oct	Qantas
06 Sep - 13 Sep	LATAM Airlines Group
08 Sep - 15 Sep	LATAM Airlines Group
29 Sep - 21 Oct	LATAM Airlines Group
08 Sep - 17 Oct	LATAM Airlines Group
14 Sep - 09 Oct	LATAM Airlines Group
26 Sep - 08 Oct	Qantas
29 Sep - 14 Oct	LATAM Airlines Group
07 Sep - 05 Oct	Qantas
16 Sep - 17 Oct	LATAM Airlines Group
12 Sep - 16 Oct	Qantas

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 1413€

Return flights