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

Return flights

29 Dec - 05 Jan	VietJet Air
31 Dec - 06 Jan	VietJet Air
31 Dec - 03 Jan	VietJet Air
30 Dec - 06 Jan	Eastar Jet
30 Dec - 03 Jan	Eastar Jet
29 Dec - 06 Jan	VietJet Air
29 Dec - 31 Jan	VietJet Air
29 Dec - 14 Jan	VietJet Air
31 Dec - 09 Jan	VietJet Air
31 Dec - 05 Jan	VietJet Air
26 Dec - 31 Dec	VietJet Air
29 Dec - 30 Dec	VietJet Air
28 Dec - 31 Dec	VietJet Air
28 Dec - 29 Dec	VietJet Air
25 Dec - 31 Dec	China Southern
25 Dec - 27 Dec	AirAsia X
25 Dec - 29 Dec	AirAsia X
26 Dec - 29 Dec	AirAsia X
27 Dec - 31 Dec	AirAsia X
27 Dec - 30 Dec	AirAsia X

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

Cheap car rent in Singapore

Cheapest return flights from Seoul to Singapore in December from $288

Return flights