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

Return flights

13 Aug - 20 Aug	AirAsia
03 Aug - 11 Aug	AirAsia
01 Aug - 10 Aug	AirAsia
03 Aug - 09 Aug	AirAsia
05 Aug - 11 Aug	IndiGo
28 Aug - 13 Sep	AirAsia
28 Aug - 09 Sep	AirAsia
31 Aug - 13 Sep	AirAsia
31 Aug - 09 Sep	AirAsia
26 Aug - 13 Sep	AirAsia
25 Aug - 13 Sep	AirAsia
25 Aug - 09 Sep	AirAsia
07 Aug - 20 Aug	AirAsia
19 Aug - 09 Sep	AirAsia
02 Aug - 09 Aug	AirAsia
27 Aug - 13 Sep	AirAsia
27 Aug - 09 Sep	AirAsia
12 Aug - 20 Aug	AirAsia
28 Aug - 29 Aug	Malaysia Airlines
28 Aug - 30 Aug	AirAsia

Also check the deals for one-way flights from Colombo to Seoul in August.

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 August from 301€

Return flights