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

Return flights

29 Sep - 16 Oct	Hainan Airlines
29 Sep - 09 Oct	Hainan Airlines
04 Sep - 14 Sep	easyJet
04 Sep - 17 Sep	easyJet
01 Sep - 18 Sep	Etihad Airways
14 Sep - 23 Sep	KLM
15 Sep - 23 Sep	KLM
15 Sep - 13 Oct	Air France
01 Sep - 21 Sep	Hainan Airlines
03 Sep - 21 Sep	Hainan Airlines
10 Sep - 14 Sep	Hainan Airlines
03 Sep - 14 Sep	Hainan Airlines
01 Sep - 10 Sep	Finnair
09 Sep - 31 Oct	Qatar Airways
29 Sep - 20 Oct	Finnair
10 Sep - 31 Oct	Finnair
12 Sep - 13 Oct	Finnair
08 Sep - 16 Oct	KLM
26 Sep - 08 Oct	Lufthansa
24 Sep - 08 Oct	LOT

Also check the deals for one-way flights from Prague 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 Prague to Seoul in September from 562€

Return flights