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

Return flights

16 Dec - 21 Dec	AirAsia
14 Dec - 21 Dec	AirAsia
23 Dec - 05 Jan	Thai AirAsia
24 Dec - 31 Dec	China Eastern
11 Dec - 18 Dec	Thai AirAsia
25 Dec - 05 Jan	Cathay Pacific
13 Dec - 14 Dec	AirAsia
16 Dec - 31 Dec	AirAsia
17 Dec - 31 Dec	AirAsia
18 Dec - 01 Jan	AirAsia
30 Dec - 12 Jan	Thai AirAsia
29 Dec - 05 Jan	Cathay Pacific
19 Dec - 02 Jan	Cathay Pacific
21 Dec - 29 Dec	Air China
21 Dec - 29 Dec	SriLankan Airlines	direct
23 Dec - 05 Jan	SriLankan Airlines	direct
30 Dec - 12 Jan	SriLankan Airlines	direct
16 Dec - 31 Dec	SriLankan Airlines	direct

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 $351

Return flights