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

Return flights

31 Dec - 07 Jan	Thai Lion Air	direct
02 Dec - 11 Dec	Scoot
30 Dec - 08 Jan	Thai Lion Air	direct
09 Dec - 13 Dec	Scoot
09 Dec - 12 Dec	Scoot
31 Dec - 06 Jan	Thai AirAsia	direct
28 Dec - 10 Jan	Thai Lion Air	direct
08 Dec - 13 Dec	Scoot
09 Dec - 14 Dec	Scoot
02 Dec - 10 Dec	Scoot
04 Dec - 22 Jan	Scoot
31 Dec - 17 Jan	Scoot
09 Dec - 10 Dec	Scoot
26 Dec - 14 Jan	Thai Lion Air	direct
03 Dec - 10 Dec	Thai Lion Air	direct
08 Dec - 23 Dec	Scoot
04 Dec - 26 Jan	Scoot
02 Dec - 18 Dec	Scoot
25 Dec - 09 Jan	Thai AirAsia	direct
10 Dec - 17 Jan	Scoot

Also check the deals for one-way flights from Singapore to Bangkok 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 Singapore to Bangkok in December from $146

Return flights