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

Return flights

27 Aug - 10 Sep	LOT
21 Aug - 26 Aug	Turkish Airlines
23 Aug - 30 Aug	LOT
25 Aug - 31 Aug	Ryanair
21 Aug - 04 Sep	Turkish Airlines
19 Aug - 26 Aug	LOT
26 Aug - 28 Aug	Ryanair
24 Aug - 01 Sep	LOT
07 Aug - 21 Aug	Turkish Airlines
28 Aug - 13 Sep	T'way Air
13 Aug - 20 Aug	Turkish Airlines
18 Aug - 25 Aug	Turkish Airlines
04 Aug - 13 Aug	Air Serbia
12 Aug - 16 Aug	LOT
28 Aug - 13 Sep	T'way Air	direct
21 Aug - 04 Sep	T'way Air	direct

Also check the deals for one-way flights from Zagreb to Seoul in August.

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 August from 713€

Return flights