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

Return flights

25 Dec - 30 Dec	Batik Air Malaysia
28 Dec - 01 Jan	Scoot	direct
26 Dec - 01 Jan	AirAsia X
30 Dec - 05 Jan	AirAsia X
31 Dec - 04 Jan	AirAsia X
21 Dec - 25 Dec	Thai Airways
24 Dec - 25 Dec	Scoot	direct
23 Dec - 30 Dec	Batik Air Malaysia
26 Dec - 30 Dec	AirAsia X
26 Dec - 31 Dec	AirAsia X
27 Dec - 30 Dec	Scoot	direct
24 Dec - 29 Dec	Scoot	direct
24 Dec - 30 Dec	Scoot	direct
24 Dec - 26 Dec	Scoot	direct
27 Dec - 01 Jan	Scoot	direct
24 Dec - 01 Jan	Scoot	direct
26 Dec - 01 Jan	Scoot	direct
30 Dec - 13 Jan	AirAsia X
28 Dec - 04 Jan	AirAsia X
23 Dec - 01 Jan	Scoot	direct

Also check the deals for one-way flights from Sydney to Singapore 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 Singapore in December from 624€

Return flights