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

Return flights

04 Sep - 08 Sep	Cebu Pacific
15 Sep - 17 Sep	Scoot Tigerair	direct
11 Sep - 17 Sep	Cebu Pacific
02 Sep - 08 Sep	Jeju Air	direct
15 Sep - 16 Sep	Scoot Tigerair
04 Sep - 10 Sep	Cebu Pacific
29 Sep - 10 Oct	AirAsia
29 Sep - 15 Oct	AirAsia
28 Sep - 15 Oct	AirAsia
04 Sep - 06 Sep	Cebu Pacific
06 Sep - 23 Sep	Cebu Pacific
29 Sep - 16 Oct	AirAsia
29 Sep - 14 Oct	AirAsia
28 Sep - 16 Oct	AirAsia
28 Sep - 14 Oct	AirAsia
18 Sep - 24 Sep	Scoot Tigerair
18 Sep - 23 Sep	Cebu Pacific
20 Sep - 10 Oct	AirAsia
27 Sep - 10 Oct	AirAsia
27 Sep - 15 Oct	AirAsia

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

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 September from $224

Return flights