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

Return flights

27 Sep - 03 Oct	Japan Airlines
22 Sep - 29 Sep	Japan Airlines
22 Sep - 22 Oct	Japan Airlines
22 Sep - 13 Oct	Japan Airlines
29 Sep - 03 Oct	Japan Airlines
29 Sep - 13 Oct	Japan Airlines
24 Sep - 28 Sep	Japan Airlines
29 Sep - 04 Oct	Japan Airlines
29 Sep - 02 Oct	Japan Airlines
30 Sep - 06 Oct	Japan Airlines

Also check the deals for one-way flights from Seoul to Prague 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 Seoul to Prague in September from $2518

Return flights