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

Return flights

01 Sep - 18 Sep	Lufthansa
01 Sep - 16 Sep	Lufthansa
01 Sep - 09 Sep	Lufthansa
08 Sep - 18 Sep	Lufthansa
01 Sep - 07 Sep	Lufthansa
09 Sep - 18 Sep	Lufthansa
11 Sep - 18 Sep	Lufthansa
04 Sep - 09 Sep	Lufthansa
16 Sep - 23 Sep	Lufthansa
09 Sep - 16 Sep	Lufthansa
24 Sep - 01 Oct	Air France
11 Sep - 01 Oct	LOT
07 Sep - 01 Oct	LOT
09 Sep - 01 Oct	LOT
13 Sep - 02 Oct	T'way Air	direct
08 Sep - 01 Oct	Lufthansa
24 Sep - 05 Oct	KLM
23 Sep - 05 Oct	KLM
24 Sep - 04 Oct	KLM
10 Sep - 01 Oct	LOT

Also check the deals for one-way flights from Seoul to Zagreb 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 Zagreb in September from $645

Return flights