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

Return flights

30 Dec - 04 Jan	Air China
24 Dec - 28 Dec	SriLankan Airlines	direct
30 Dec - 03 Jan	Air China
31 Dec - 25 Jan	Air China
31 Dec - 14 Jan	Air China
24 Dec - 30 Dec	SriLankan Airlines	direct
22 Dec - 30 Dec	SriLankan Airlines	direct
22 Dec - 13 Jan	Thai AirAsia X
26 Dec - 31 Dec	Air China
23 Dec - 15 Jan	Air China
22 Dec - 14 Jan	Air China
23 Dec - 14 Jan	Air China
23 Dec - 28 Dec	Air China
23 Dec - 31 Dec	Air China
26 Dec - 15 Jan	Air China
22 Dec - 26 Jan	Air China
24 Dec - 31 Dec	Thai Airways
25 Dec - 30 Dec	Thai Airways
22 Dec - 29 Dec	AirAsia X
22 Dec - 31 Dec	Thai Airways

Also check the deals for one-way flights from Seoul to Colombo 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 Colombo in December from 447€

Return flights