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

Return flights

30 Sep - 11 Oct	Ryanair
24 Sep - 09 Oct	Ryanair
17 Sep - 24 Sep	Ryanair
25 Sep - 09 Oct	Ryanair
16 Sep - 24 Sep	Ryanair
20 Sep - 25 Sep	Ryanair
18 Sep - 30 Sep	Ryanair
13 Sep - 23 Sep	Ryanair
22 Sep - 27 Sep	Ryanair
13 Sep - 20 Sep	Ryanair
16 Sep - 18 Sep	Ryanair
27 Sep - 06 Oct	LOT
25 Sep - 09 Oct	T'way Air	direct
24 Sep - 28 Sep	Ryanair
13 Sep - 27 Sep	Ryanair
25 Sep - 07 Oct	KLM
25 Sep - 06 Oct	Emirates
20 Sep - 04 Oct	Ryanair
27 Sep - 05 Oct	LOT
27 Sep - 07 Oct	LOT

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 636€

Return flights