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	Ryanair
13 Sep - 20 Sep	Ryanair
16 Sep - 20 Sep	Ryanair
30 Sep - 11 Oct	LOT
13 Sep - 23 Sep	Ryanair
15 Sep - 21 Sep	Ryanair
30 Sep - 18 Oct	Pegasus Airlines
14 Sep - 18 Sep	Ryanair
16 Sep - 25 Oct	T'way Air	direct
24 Sep - 08 Oct	LOT
11 Sep - 21 Sep	T'way Air
14 Sep - 21 Sep	Ryanair
02 Sep - 09 Sep	Ryanair
10 Sep - 25 Sep	Ryanair
11 Sep - 23 Sep	T'way Air
25 Sep - 09 Oct	Austrian Airlines
28 Sep - 12 Oct	Ryanair
27 Sep - 11 Oct	LOT
25 Sep - 07 Oct	KLM
30 Sep - 11 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 $622

Return flights