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

Return flights

25 Sep - 15 Oct	Wizz Air
27 Sep - 18 Oct	Pegasus Airlines
27 Sep - 17 Oct	Pegasus Airlines
28 Sep - 09 Oct	Pegasus Airlines
20 Sep - 11 Oct	Ryanair
22 Sep - 28 Sep	Ryanair
28 Sep - 15 Oct	Pegasus Airlines
23 Sep - 30 Sep	Ryanair
21 Sep - 30 Sep	Pegasus Airlines
20 Sep - 28 Sep	Ryanair
20 Sep - 30 Sep	Ryanair
26 Sep - 14 Oct	Ryanair
20 Sep - 01 Oct	Ryanair
20 Sep - 29 Sep	Pegasus Airlines
20 Sep - 02 Oct	Ryanair
27 Sep - 04 Oct	Pegasus Airlines
19 Sep - 30 Sep	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 $719

Return flights