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

Return flights

07 Dec - 11 Dec	Cebu Pacific
01 Dec - 07 Dec	Cebu Pacific
06 Dec - 13 Dec	Air China
12 Dec - 21 Dec	Garuda Indonesia
29 Dec - 12 Jan	Vietnam Airlines
12 Dec - 17 Dec	Garuda Indonesia
10 Dec - 14 Dec	Garuda Indonesia
29 Dec - 14 Jan	Scoot	direct
29 Dec - 12 Jan	Scoot	direct
08 Dec - 13 Dec	Air China
29 Dec - 09 Jan	Scoot
15 Dec - 10 Jan	Shandong Airlines
29 Dec - 03 Jan	Shandong Airlines
04 Dec - 29 Dec	Cebu Pacific
13 Dec - 19 Jan	VietJet Air
31 Dec - 11 Jan	Scoot
31 Dec - 09 Jan	Scoot
31 Dec - 08 Jan	Scoot
14 Dec - 18 Dec	Scoot
08 Dec - 11 Dec	VietJet 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Singapore to Seoul in December from $298

Return flights