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

Return flights

30 Dec - 07 Jan	T'way Air
31 Dec - 07 Jan	T'way Air
01 Dec - 03 Dec	VietJet Air
02 Dec - 08 Dec	AirAsia
06 Dec - 09 Dec	AirAsia
04 Dec - 07 Dec	Garuda Indonesia
05 Dec - 08 Dec	Garuda Indonesia
10 Dec - 17 Dec	Indonesia AirAsia
30 Dec - 09 Jan	Vietnam Airlines
03 Dec - 05 Dec	AirAsia
08 Dec - 16 Dec	Scoot
03 Dec - 08 Dec	Scoot
01 Dec - 06 Dec	Scoot
31 Dec - 09 Jan	Vietnam Airlines
29 Dec - 07 Jan	Scoot
31 Dec - 08 Jan	Cathay Pacific
31 Dec - 10 Jan	Cathay Pacific
30 Dec - 06 Jan	Cathay Pacific
31 Dec - 06 Jan	Cathay Pacific
27 Dec - 02 Jan	China Southern

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Singapore to Seoul in December from $277

Return flights