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

Return flights

04 Dec - 19 Dec	China Eastern
07 Dec - 23 Dec	Qantas
26 Dec - 21 Jan	United
29 Dec - 21 Jan	United
03 Dec - 21 Jan	United
27 Dec - 25 Jan	United
27 Dec - 26 Jan	United
27 Dec - 27 Jan	United
08 Dec - 29 Dec	United
03 Dec - 06 Dec	LATAM Airlines Group
26 Dec - 26 Jan	United
26 Dec - 30 Jan	United
25 Dec - 23 Jan	United
27 Dec - 24 Jan	United
02 Dec - 16 Dec	Qantas
01 Dec - 17 Dec	United
08 Dec - 26 Dec	United
24 Dec - 31 Dec	LATAM Airlines Group
08 Dec - 30 Dec	LATAM Airlines Group
10 Dec - 24 Dec	LATAM Airlines Group

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 $1709

Return flights