AirHint found the following cheapest return flights from Seoul (GMP) to Singapore (SIN) in January 2026 (see full year).

Return flights

19 Jan - 26 Jan	Air China
22 Jan - 26 Jan	Air China
21 Jan - 28 Jan	Air China
22 Jan - 27 Jan	Air China
22 Jan - 29 Jan	Air China
20 Jan - 26 Jan	Air China
21 Jan - 26 Jan	Air China
16 Jan - 21 Jan	Air China
19 Jan - 23 Jan	Air China
22 Jan - 25 Jan	Air China
29 Jan - 03 Feb	Jeju Air
29 Jan - 04 Feb	Jeju Air
27 Jan - 03 Feb	Air China
28 Jan - 03 Feb	Air China
21 Jan - 09 Feb	T'way Air
26 Jan - 02 Feb	T'way Air
29 Jan - 02 Feb	Jeju Air
31 Jan - 10 Feb	T'way Air
27 Jan - 02 Feb	T'way Air
31 Jan - 02 Feb	T'way Air

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

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 Seoul to Singapore in January from $249

Return flights