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

Return flights

27 Dec - 03 Jan	Scoot	direct
15 Dec - 16 Dec	Scoot	direct
15 Dec - 22 Jan	Scoot	direct
25 Dec - 01 Jan	Scoot	direct
16 Dec - 18 Dec	Scoot	direct
16 Dec - 19 Dec	Scoot	direct
22 Dec - 31 Dec	Scoot	direct
17 Dec - 18 Dec	Scoot	direct
15 Dec - 17 Dec	Scoot	direct
28 Dec - 31 Dec	Scoot	direct
30 Dec - 04 Jan	Scoot	direct
17 Dec - 22 Dec	Scoot	direct
26 Dec - 29 Dec	Scoot	direct
19 Dec - 22 Dec	Scoot	direct
28 Dec - 02 Jan	Scoot	direct

Also check the deals for one-way flights from Ko Samui 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 Ko Samui to Singapore in December from $289

Return flights