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

Return flights

27 Oct - 26 Nov	Jeju Air	direct
27 Oct - 05 Nov	Jeju Air	direct
27 Oct - 09 Nov	Jeju Air
27 Oct - 29 Oct	Jeju Air
29 Oct - 31 Oct	Jeju Air
28 Oct - 16 Nov	Jeju Air
27 Oct - 02 Nov	Jeju Air
28 Oct - 01 Nov	Jeju Air
28 Oct - 29 Oct	Jeju Air
29 Oct - 13 Nov	Jeju Air
30 Oct - 04 Nov	AirAsia
29 Oct - 31 Oct	Jeju Air	direct
31 Oct - 03 Nov	AirAsia
27 Oct - 29 Oct	Jeju Air	direct
28 Oct - 17 Nov	Jeju Air
28 Oct - 31 Oct	Jeju Air
27 Oct - 31 Oct	Jeju Air	direct
28 Oct - 31 Oct	Jeju Air	direct
28 Oct - 29 Oct	Jeju Air	direct
26 Oct - 30 Oct	AirAsia

Also check the deals for one-way flights from Singapore to Seoul 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 Singapore to Seoul in October from $213

Return flights