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

Return flights

29 Sep - 08 Oct	AirAsia
28 Sep - 08 Oct	AirAsia
28 Sep - 11 Oct	AirAsia
28 Sep - 15 Oct	AirAsia
27 Sep - 08 Oct	AirAsia
28 Sep - 14 Oct	AirAsia
23 Sep - 08 Oct	AirAsia
21 Sep - 29 Sep	AirAsia
22 Sep - 08 Oct	AirAsia
27 Sep - 11 Oct	AirAsia
23 Sep - 11 Oct	AirAsia
22 Sep - 24 Sep	AirAsia
19 Sep - 23 Sep	AirAsia
18 Sep - 23 Sep	AirAsia
21 Sep - 23 Sep	AirAsia
27 Sep - 29 Sep	AirAsia
23 Sep - 29 Sep	AirAsia
19 Sep - 24 Sep	AirAsia
20 Sep - 23 Sep	AirAsia
23 Sep - 25 Sep	AirAsia

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

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 September from 336€

Return flights