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

Return flights

15 Dec - 19 Jan	Sichuan Airlines
15 Dec - 12 Jan	Sichuan Airlines
14 Dec - 12 Jan	Sichuan Airlines
24 Dec - 13 Jan	China Eastern
11 Dec - 16 Jan	Air China
03 Dec - 13 Dec	Air China
03 Dec - 10 Dec	Air China
18 Dec - 20 Jan	China Eastern
04 Dec - 15 Dec	Air China
11 Dec - 14 Dec	Air China
02 Dec - 06 Dec	Air China
02 Dec - 09 Dec	Air China
19 Dec - 18 Jan	China Eastern
19 Dec - 19 Jan	China Eastern
30 Dec - 21 Jan	China Eastern
30 Dec - 22 Jan	China Eastern
08 Dec - 15 Dec	Air China
01 Dec - 07 Dec	Sichuan Airlines
03 Dec - 07 Dec	Air China
06 Dec - 09 Dec	Air China

Also check the deals for one-way flights from Madrid 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 Madrid to Sydney in December from 646€

Return flights