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

Return flights

01 Dec - 10 Dec	AirAsia
01 Dec - 05 Dec	AirAsia
10 Dec - 13 Dec	China Eastern
07 Dec - 10 Dec	AirAsia
07 Dec - 21 Jan	AirAsia
06 Dec - 21 Jan	AirAsia
02 Dec - 08 Dec	China Eastern
14 Dec - 21 Jan	AirAsia
14 Dec - 28 Jan	AirAsia
11 Dec - 25 Jan	AirAsia
09 Dec - 10 Dec	AirAsia
09 Dec - 21 Jan	AirAsia
09 Dec - 23 Jan	AirAsia
09 Dec - 24 Jan	AirAsia
10 Dec - 25 Jan	Malaysia Airlines
10 Dec - 19 Jan	Cathay Pacific
08 Dec - 09 Dec	Cathay Pacific
08 Dec - 15 Dec	Cathay Pacific
09 Dec - 09 Dec	Cathay Pacific
08 Dec - 24 Dec	AirAsia

Also check the deals for one-way flights from Colombo 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.

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Cheapest return flights from Colombo to Seoul in December from 399€

Return flights