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

Return flights

09 Dec - 30 Jan	United
02 Dec - 26 Dec	Qantas
07 Dec - 30 Dec	United
05 Dec - 26 Dec	Qantas
26 Dec - 26 Jan	United
09 Dec - 28 Dec	LATAM Airlines Group
24 Dec - 31 Dec	LATAM Airlines Group
01 Dec - 31 Dec	LATAM Airlines Group
08 Dec - 31 Dec	Qantas
08 Dec - 30 Dec	Qantas
06 Dec - 10 Jan	American Airlines
09 Dec - 29 Dec	United
02 Dec - 26 Jan	LATAM Airlines Group
07 Dec - 29 Dec	United
26 Dec - 02 Jan	Qantas
25 Dec - 05 Jan	Qantas
25 Dec - 10 Jan	Qantas
28 Dec - 13 Jan	Qantas
03 Dec - 02 Jan	Turkish Airlines
03 Dec - 14 Jan	Emirates

Also check the deals for one-way 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 return flights from Sydney to Buenos Aires in December from $1925

Return flights