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

Return flights

19 Sep - 05 Oct	LATAM Airlines Group
21 Sep - 05 Oct	LATAM Airlines Group
20 Sep - 18 Oct	LATAM Airlines Group
17 Sep - 19 Oct	Copa
22 Sep - 13 Oct	LATAM Airlines Group
29 Sep - 03 Oct	LATAM Airlines Group
19 Sep - 26 Sep	LATAM Airlines Group
15 Sep - 17 Oct	Copa
23 Sep - 21 Oct	LATAM Airlines Group
15 Sep - 22 Sep	Copa
30 Sep - 04 Oct	Avianca
17 Sep - 01 Oct	Copa
15 Sep - 17 Sep	Copa
15 Sep - 29 Sep	Copa
19 Sep - 21 Sep	LATAM Airlines Group
26 Sep - 28 Sep	Aerolineas Argentinas

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 1491€

Return flights