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

Return flights

29 Dec - 05 Jan	China Eastern
31 Dec - 10 Jan	China Eastern
31 Dec - 07 Jan	China Eastern
15 Dec - 22 Dec	China Eastern
03 Dec - 14 Dec	AirAsia X
05 Dec - 19 Dec	AirAsia X
01 Dec - 11 Dec	China Eastern
01 Dec - 04 Dec	China Eastern
17 Dec - 13 Jan	AirAsia X
08 Dec - 15 Dec	AirAsia X
01 Dec - 05 Dec	AirAsia X
03 Dec - 06 Dec	AirAsia X
03 Dec - 07 Dec	AirAsia X
04 Dec - 08 Dec	AirAsia X
29 Dec - 13 Jan	Air China
30 Dec - 14 Jan	Air China
18 Dec - 01 Jan	AirAsia X
27 Dec - 05 Jan	China Eastern
31 Dec - 11 Jan	Air China
30 Dec - 07 Jan	Air China

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 361€

Return flights