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

Return flights

17 Aug - 24 Aug	AirAsia
04 Aug - 06 Aug	AirAsia
26 Aug - 31 Aug	Cathay Pacific
25 Aug - 03 Sep	Cathay Pacific
04 Aug - 13 Aug	AirAsia
04 Aug - 11 Aug	AirAsia
26 Aug - 13 Sep	AirAsia
22 Aug - 25 Aug	AirAsia
21 Aug - 25 Aug	AirAsia
24 Aug - 13 Sep	AirAsia
31 Aug - 13 Sep	AirAsia
06 Aug - 13 Aug	AirAsia
06 Aug - 11 Aug	AirAsia
25 Aug - 13 Sep	AirAsia
05 Aug - 23 Sep	AirAsia
05 Aug - 17 Aug	Cathay Pacific
22 Aug - 06 Sep	AirAsia
21 Aug - 06 Sep	AirAsia
22 Aug - 12 Sep	AirAsia
22 Aug - 03 Sep	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 375€

Return flights