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

Return flights

06 Dec - 08 Dec	EVA Air
06 Dec - 09 Dec	EVA Air
05 Dec - 26 Dec	Air China
22 Dec - 29 Dec	China Eastern
23 Dec - 02 Jan	Air China
24 Dec - 26 Dec	Air China
21 Dec - 30 Dec	Air China
23 Dec - 27 Dec	Air China
22 Dec - 26 Dec	Air China
27 Dec - 03 Jan	Air China
04 Dec - 13 Dec	Air China
28 Dec - 04 Jan	Air China
19 Dec - 26 Dec	Air China
19 Dec - 01 Jan	Air China
31 Dec - 04 Jan	Air China
31 Dec - 03 Jan	Air China
25 Dec - 01 Jan	Air China
26 Dec - 01 Jan	Air China
29 Dec - 02 Jan	Air China
27 Dec - 02 Jan	Air China

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.

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Cheapest return flights from Seoul to Singapore in December from $533

Return flights