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

Return flights

01 Dec - 07 Dec	Jetstar
01 Dec - 08 Dec	Jetstar
01 Dec - 06 Dec	Jetstar
02 Dec - 10 Dec	Jetstar
01 Dec - 09 Dec	Jetstar
03 Dec - 21 Dec	Jetstar
10 Dec - 24 Dec	Jetstar
07 Dec - 14 Dec	Jetstar
10 Dec - 23 Dec	Jetstar
10 Dec - 31 Jan	Jetstar
10 Dec - 21 Dec	Jetstar
29 Dec - 01 Jan	Jetstar
15 Dec - 08 Jan	Jetstar
31 Dec - 04 Jan	Jetstar
30 Dec - 05 Jan	Qantas
18 Dec - 01 Jan	Jetstar
23 Dec - 27 Jan	Indonesia AirAsia
30 Dec - 06 Jan	Jetstar
24 Dec - 16 Jan	Jetstar
28 Dec - 01 Jan	Jetstar

Also check the deals for one-way flights from Adelaide 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 Adelaide to Singapore in December from 377€

Return flights