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

Return flights

05 Dec - 29 Dec	LATAM Airlines Group
25 Dec - 22 Jan	JetSmart
21 Dec - 17 Jan	Aerolineas Argentinas
02 Dec - 22 Dec	LATAM Airlines Group
17 Dec - 08 Jan	LATAM Airlines Group
29 Dec - 27 Jan	LATAM Airlines Group
18 Dec - 06 Jan	JetSmart
28 Dec - 17 Jan	JetSmart
19 Dec - 28 Dec	LATAM Airlines Group
11 Dec - 18 Dec	LATAM Airlines Group
27 Dec - 22 Jan	LATAM Airlines Group
28 Dec - 18 Jan	LATAM Airlines Group
27 Dec - 18 Jan	LATAM Airlines Group
29 Dec - 04 Jan	LATAM Airlines Group
05 Dec - 19 Dec	Qatar Airways

Also check the deals for one-way flights from Buenos Aires to Sydney 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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Cheapest return flights from Buenos Aires to Sydney in December from 1774€

Return flights