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

Return flights

01 Dec - 09 Dec	Air Canada
08 Dec - 12 Jan	Air Canada
29 Dec - 18 Jan	LATAM Airlines Group
03 Dec - 30 Jan	Qantas
03 Dec - 14 Jan	Turkish Airlines
10 Dec - 18 Dec	LATAM Airlines Group
10 Dec - 23 Jan	United
10 Dec - 09 Jan	Turkish Airlines
15 Dec - 21 Dec	LATAM Airlines Group
15 Dec - 18 Jan	LATAM Airlines Group
14 Dec - 29 Dec	Qantas
15 Dec - 05 Jan	Turkish Airlines
04 Dec - 18 Dec	Turkish Airlines
20 Dec - 04 Jan	Jetstar
18 Dec - 09 Jan	Turkish Airlines
14 Dec - 30 Dec	United

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 $1539

Return flights