AirHint found the following cheapest return flights from Seoul (GMP) to Singapore (SIN) in October 2025 (see full year).

Return flights

28 Oct - 01 Nov	China Eastern
28 Oct - 30 Oct	China Eastern
29 Oct - 02 Nov	China Eastern
31 Oct - 05 Nov	Air China
24 Oct - 01 Nov	Air China
26 Oct - 29 Oct	China Eastern
25 Oct - 29 Oct	Air China
25 Oct - 30 Oct	Air China
27 Oct - 02 Nov	Air China
31 Oct - 09 Nov	Air China
20 Oct - 23 Oct	Air China
17 Oct - 26 Oct	Air China
21 Oct - 26 Oct	Air China
26 Oct - 30 Oct	China Eastern
28 Oct - 03 Nov	Air China
31 Oct - 03 Nov	Air China
15 Oct - 22 Oct	Air China
16 Oct - 21 Oct	Air China
31 Oct - 02 Nov	Air China
27 Oct - 12 Nov	Air China

Also check the deals for one-way flights from Seoul to Singapore in October.

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 Seoul to Singapore in October from $263

Return flights