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

Return flights

16 Sep - 25 Oct	LOT
01 Sep - 14 Sep	Croatia Airlines
30 Sep - 25 Oct	Lufthansa
16 Sep - 09 Oct	Lufthansa
09 Sep - 23 Sep	LOT
05 Sep - 12 Sep	LOT
25 Sep - 14 Oct	Ryanair
13 Sep - 16 Sep	LOT
01 Sep - 06 Sep	Ryanair
30 Sep - 25 Oct	T'way Air	direct
02 Sep - 17 Sep	KLM
25 Sep - 09 Oct	KLM
11 Sep - 24 Sep	Lufthansa
16 Sep - 25 Oct	T'way Air	direct
13 Sep - 24 Sep	LOT
06 Sep - 20 Sep	LOT
25 Sep - 11 Oct	Ryanair
25 Sep - 07 Oct	Lufthansa
04 Sep - 06 Sep	Ryanair
25 Sep - 14 Oct	T'way Air	direct

Also check the deals for one-way flights from Zagreb 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 Zagreb to Seoul in September from 592€

Return flights