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

Return flights

16 Sep - 21 Oct	T'way Air	direct
02 Sep - 09 Sep	LOT
04 Sep - 18 Sep	T'way Air	direct
09 Sep - 16 Sep	KLM
01 Sep - 08 Sep	Air France
06 Sep - 18 Sep	KLM
25 Sep - 10 Oct	KLM
02 Sep - 13 Sep	LOT
02 Sep - 12 Sep	KLM
06 Sep - 16 Sep	KLM
02 Sep - 13 Sep	T'way Air	direct
01 Sep - 16 Sep	LOT
25 Sep - 08 Oct	KLM
25 Sep - 07 Oct	KLM
23 Sep - 06 Oct	Emirates
25 Sep - 07 Oct	T'way Air	direct
24 Sep - 05 Oct	LOT
23 Sep - 04 Oct	LOT
22 Sep - 05 Oct	Emirates
19 Sep - 02 Oct	Austrian Airlines

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 $703

Return flights