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

Return flights

05 Dec - 10 Dec	LOT
22 Dec - 22 Jan	KLM
29 Dec - 08 Jan	KLM
27 Dec - 31 Dec	LOT
24 Dec - 01 Jan	KLM
14 Dec - 21 Dec	Lufthansa
29 Dec - 04 Jan	KLM
27 Dec - 02 Jan	LOT
30 Dec - 11 Jan	KLM
30 Dec - 09 Jan	Lufthansa
27 Dec - 05 Jan	LOT
27 Dec - 03 Jan	LOT
27 Dec - 04 Jan	LOT
15 Dec - 19 Dec	Qatar Airways

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

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 December from 588€

Return flights