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

Return flights

05 Dec - 08 Dec	Hainan Airlines
08 Dec - 10 Dec	AirAsia
04 Dec - 07 Dec	Scoot
05 Dec - 07 Dec	AirAsia
02 Dec - 05 Dec	AirAsia
02 Dec - 07 Dec	AirAsia
03 Dec - 10 Dec	AirAsia
08 Dec - 13 Jan	AirAsia
08 Dec - 17 Dec	AirAsia
05 Dec - 10 Dec	AirAsia
01 Dec - 04 Dec	AirAsia
31 Dec - 07 Jan	T'way Air
14 Dec - 10 Jan	Cathay Pacific
16 Dec - 07 Jan	Cathay Pacific
17 Dec - 09 Jan	Cathay Pacific
08 Dec - 07 Jan	Cathay Pacific
31 Dec - 06 Jan	Cathay Pacific
17 Dec - 10 Jan	Cathay Pacific
31 Dec - 09 Jan	Cathay Pacific
30 Dec - 06 Jan	T'way Air

Also check the deals for one-way flights from Singapore to Seoul 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 Singapore to Seoul in December from 201€

Return flights