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

Return flights

10 Sep - 25 Sep	Hainan Airlines
29 Sep - 07 Oct	Etihad Airways
22 Sep - 23 Oct	Hainan Airlines
10 Sep - 18 Sep	Hainan Airlines
10 Sep - 16 Sep	Hainan Airlines
17 Sep - 26 Oct	Hainan Airlines
17 Sep - 23 Sep	Hainan Airlines
24 Sep - 14 Oct	Hainan Airlines
15 Sep - 18 Sep	Hainan Airlines
15 Sep - 21 Sep	Hainan Airlines
15 Sep - 25 Sep	Hainan Airlines
17 Sep - 21 Sep	Hainan Airlines
30 Sep - 08 Oct	KLM
29 Sep - 08 Oct	KLM
09 Sep - 09 Oct	KLM
29 Sep - 15 Oct	KLM
12 Sep - 13 Oct	Smart Wings
10 Sep - 13 Sep	Wizz Air UK
08 Sep - 09 Oct	KLM
17 Sep - 19 Sep	easyJet

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 544€

Return flights