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

Return flights

01 Dec - 09 Dec	Virgin Australia
05 Dec - 28 Dec	Asiana Airlines
04 Dec - 10 Jan	Turkish Airlines
07 Dec - 24 Dec	Air China
15 Dec - 28 Dec	Air China
01 Dec - 31 Dec	British Airways
26 Dec - 10 Jan	Air China
07 Dec - 27 Dec	Air China
11 Dec - 27 Dec	Air China
10 Dec - 27 Dec	Air China
11 Dec - 13 Jan	Air China
13 Dec - 06 Jan	Air China
07 Dec - 28 Dec	Air China
10 Dec - 28 Dec	Air China
22 Dec - 11 Jan	Air China
13 Dec - 05 Jan	Air China
16 Dec - 13 Jan	Air China
18 Dec - 08 Jan	Air China
18 Dec - 04 Jan	Air China
10 Dec - 10 Jan	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 1008€

Return flights