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

Return flights

24 Sep - 05 Oct	Lufthansa
24 Sep - 29 Sep	Lufthansa
24 Sep - 30 Sep	Lufthansa
24 Sep - 01 Oct	Lufthansa
23 Sep - 04 Oct	Lufthansa
18 Sep - 30 Sep	T'way Air	direct
23 Sep - 30 Sep	T'way Air
23 Sep - 27 Sep	T'way Air
18 Sep - 23 Sep	T'way Air	direct
25 Sep - 29 Sep	T'way Air
25 Sep - 28 Sep	T'way Air
24 Sep - 28 Sep	T'way Air
28 Sep - 02 Oct	China Eastern
23 Sep - 30 Sep	T'way Air	direct
23 Sep - 02 Oct	T'way Air	direct
24 Sep - 02 Oct	Lufthansa
20 Sep - 02 Oct	T'way Air	direct
30 Sep - 05 Oct	Lufthansa
30 Sep - 03 Oct	Lufthansa
25 Sep - 06 Oct	Lufthansa

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 $733

Return flights