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

One-Way flights

03 Sep	Avianca
26 Sep	Avianca
14 Sep	Aerolineas Argentinas
06 Sep	Flybondi
21 Sep	Flybondi
09 Sep	JetSmart
15 Sep	LATAM Airlines Group
25 Sep	LATAM Airlines Group
07 Sep	LATAM Airlines Group
13 Sep	JetSmart

Also check the deals for return 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 one-way flights from Buenos Aires to Sydney in September from $880

One-Way flights