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

Return flights

01 Sep - 17 Sep	Ryanair
06 Sep - 18 Sep	Ryanair
08 Sep - 17 Sep	Ryanair
12 Sep - 21 Sep	Ryanair
08 Sep - 21 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
05 Sep - 14 Sep	Ryanair
06 Sep - 17 Sep	Ryanair
07 Sep - 24 Sep	Wizz Air
12 Sep - 23 Sep	Ryanair
28 Sep - 08 Oct	Ryanair

Also check the deals for one-way flights from Charleroi 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 Charleroi to Seoul in September from 558€

Return flights