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

One-Way flights

09 Dec	LATAM Airlines Group
23 Dec	Jetstar
29 Dec	Jetstar
27 Dec	Jetstar
06 Dec	LATAM Airlines Group
11 Dec	LATAM Airlines Group
05 Dec	LATAM Airlines Group
16 Dec	LATAM Airlines Group
17 Dec	Qatar Airways
18 Dec	Qantas

Also check the deals for return flights from Sydney to Buenos Aires in December.

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 Sydney to Buenos Aires in December from 919€

One-Way flights