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

Return flights

29 Aug - 31 Aug	Scoot	direct
29 Aug - 02 Sep	Scoot	direct
28 Aug - 28 Aug	Bangkok Airways	direct
24 Aug - 31 Aug	Scoot	direct
26 Aug - 28 Aug	Scoot	direct
23 Aug - 23 Aug	Bangkok Airways	direct
24 Aug - 25 Aug	Scoot	direct
21 Aug - 13 Sep	Scoot	direct
22 Aug - 23 Aug	Bangkok Airways
29 Aug - 29 Aug	Scoot
22 Aug - 23 Aug	Scoot	direct
29 Aug - 29 Aug	Bangkok Airways	direct

Also check the deals for one-way flights from Ko Samui to Singapore in August.

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 August from $277

Return flights