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

Return flights

02 Dec - 06 Dec	Scoot	direct
02 Dec - 09 Dec	Scoot	direct
02 Dec - 18 Dec	Scoot	direct
03 Dec - 10 Dec	Scoot	direct
02 Dec - 05 Dec	Scoot	direct
04 Dec - 09 Dec	Jetstar
04 Dec - 07 Dec	Jetstar
04 Dec - 08 Dec	Jetstar
04 Dec - 14 Dec	Jetstar
04 Dec - 06 Dec	Jetstar
03 Dec - 01 Jan	Jetstar
05 Dec - 01 Jan	Jetstar
10 Dec - 23 Jan	Qantas
06 Dec - 15 Jan	Jetstar
07 Dec - 08 Jan	Scoot	direct
01 Dec - 22 Jan	Scoot	direct
06 Dec - 13 Jan	Jetstar
06 Dec - 13 Jan	Scoot	direct
06 Dec - 15 Jan	Scoot	direct
01 Dec - 14 Jan	Jetstar

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 $403

Return flights