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

Return flights

28 Dec - 25 Jan	AirAsia
30 Dec - 12 Jan	AirAsia
31 Dec - 07 Jan	AirAsia
30 Dec - 06 Jan	AirAsia
31 Dec - 06 Jan	VietJet Air
29 Dec - 07 Jan	VietJet Air
30 Dec - 07 Jan	VietJet Air
31 Dec - 16 Jan	VietJet Air
31 Dec - 04 Jan	Scoot
28 Dec - 15 Jan	VietJet Air
29 Dec - 31 Dec	VietJet Air
28 Dec - 31 Dec	VietJet Air
28 Dec - 29 Dec	VietJet Air
27 Dec - 31 Dec	Scoot
27 Dec - 29 Dec	Scoot
29 Dec - 30 Dec	AirAsia
28 Dec - 30 Dec	AirAsia
27 Dec - 28 Dec	Scoot
27 Dec - 30 Dec	AirAsia
29 Dec - 30 Dec	Jeju Air	direct

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 217€

Return flights