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

Return flights

16 Dec - 30 Dec	China Eastern
15 Dec - 30 Dec	China Eastern
18 Dec - 30 Dec	China Eastern
17 Dec - 30 Dec	China Eastern
18 Dec - 31 Dec	China Eastern
10 Dec - 16 Dec	China Eastern
23 Dec - 29 Dec	China Eastern
03 Dec - 14 Dec	China Eastern
24 Dec - 20 Jan	China Eastern
17 Dec - 21 Dec	China Eastern
18 Dec - 01 Jan	Air India
04 Dec - 11 Dec	Air India
26 Dec - 07 Jan	Air India
20 Dec - 10 Jan	Air India
24 Dec - 06 Jan	Air China
22 Dec - 06 Jan	Air China
24 Dec - 04 Jan	Air China
31 Dec - 04 Jan	Air China
15 Dec - 25 Jan	Air China
08 Dec - 18 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 $414

Return flights