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

Return flights

02 Dec - 06 Dec	AirAsia X
02 Dec - 10 Dec	AirAsia X
01 Dec - 09 Dec	Thai AirAsia X
01 Dec - 05 Dec	AirAsia X
27 Dec - 03 Jan	Air India
05 Dec - 12 Dec	Air India
05 Dec - 13 Dec	Air India
19 Dec - 27 Dec	Air India
03 Dec - 14 Dec	China Eastern
27 Dec - 09 Jan	Air India
03 Dec - 09 Dec	AirAsia X
18 Dec - 25 Dec	Air India
31 Dec - 08 Jan	Air China
31 Dec - 11 Jan	Air China
23 Dec - 23 Jan	Air China
30 Dec - 08 Jan	Air China
17 Dec - 13 Jan	Air China
08 Dec - 04 Jan	Thai AirAsia X
24 Dec - 07 Jan	Air China
24 Dec - 06 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 371€

Return flights