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

Return flights

23 Oct - 30 Oct	Vietnam Airlines
11 Oct - 23 Oct	AirAsia X
11 Oct - 30 Oct	AirAsia X
26 Oct - 30 Oct	AirAsia X
11 Oct - 21 Oct	AirAsia X
21 Oct - 28 Oct	T'way Air
21 Oct - 27 Oct	T'way Air
25 Oct - 30 Oct	T'way Air
24 Oct - 30 Oct	AirAsia X
11 Oct - 22 Oct	AirAsia X
20 Oct - 01 Nov	Thai VietJet Air
20 Oct - 02 Nov	Thai VietJet Air
22 Oct - 11 Nov	Thai AirAsia X
22 Oct - 04 Nov	Thai AirAsia X
22 Oct - 03 Nov	Thai AirAsia X
15 Oct - 04 Nov	AirAsia X
15 Oct - 03 Nov	AirAsia X
24 Oct - 11 Nov	AirAsia X
24 Oct - 04 Nov	AirAsia X
24 Oct - 03 Nov	AirAsia X

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

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 October from $444

Return flights