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

Return flights

28 Dec - 04 Jan	Air China
10 Dec - 17 Dec	Batik Air Malaysia
26 Dec - 31 Jan	Turkish Airlines
11 Dec - 04 Jan	Air China
11 Dec - 10 Jan	Air China
26 Dec - 18 Jan	Xiamen Airlines
25 Dec - 18 Jan	Air China
05 Dec - 14 Dec	Air China
21 Dec - 28 Dec	Air China
19 Dec - 28 Dec	Air China
16 Dec - 28 Dec	Air China
11 Dec - 18 Dec	Air China
03 Dec - 28 Dec	Air China
18 Dec - 04 Jan	Air China
05 Dec - 09 Jan	Air China
12 Dec - 09 Jan	Air China
14 Dec - 04 Jan	Air China
06 Dec - 29 Dec	Turkish Airlines
05 Dec - 29 Dec	Etihad Airways
04 Dec - 21 Dec	Air China

Also check the deals for one-way flights from Sydney to Barcelona 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 Barcelona in December from $1295

Return flights