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

Return flights

27 Dec - 14 Jan	Hainan Airlines
17 Dec - 24 Dec	VietJet Air
30 Dec - 14 Jan	AirAsia X
31 Dec - 14 Jan	Xiamen Airlines
27 Dec - 09 Jan	Hainan Airlines
29 Dec - 12 Jan	AirAsia X
28 Dec - 14 Jan	Hainan Airlines
28 Dec - 11 Jan	Hainan Airlines
27 Dec - 04 Jan	Hainan Airlines
28 Dec - 12 Jan	Hainan Airlines
28 Dec - 10 Jan	Hainan Airlines
17 Dec - 26 Dec	VietJet Air
23 Dec - 31 Dec	Hainan Airlines
17 Dec - 31 Dec	VietJet Air
24 Dec - 31 Dec	Hainan Airlines
26 Dec - 31 Dec	Air China
20 Dec - 29 Dec	Air China
18 Dec - 31 Dec	AirAsia X
20 Dec - 28 Dec	Air China
20 Dec - 27 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 $1467

Return flights