AirHint found the following cheapest return flights from Melbourne (MEL) to Buenos Aires (AEP) in December 2025 (see full year).

Return flights

11 Dec - 18 Dec	LATAM Airlines Group
08 Dec - 22 Jan	Qatar Airways
26 Dec - 04 Jan	LATAM Airlines Group
26 Dec - 16 Jan	Qatar Airways
08 Dec - 14 Jan	LATAM Airlines Group
05 Dec - 03 Jan	LATAM Airlines Group
08 Dec - 03 Jan	LATAM Airlines Group
21 Dec - 12 Jan	LATAM Airlines Group
14 Dec - 01 Jan	Qantas
20 Dec - 02 Jan	Qantas
22 Dec - 18 Jan	Qatar Airways

Also check the deals for one-way flights from Melbourne 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 Melbourne to Buenos Aires in December from 1967€

Return flights