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

Return flights

03 Dec - 09 Dec	China Eastern
05 Dec - 11 Dec	China Eastern
09 Dec - 19 Dec	Hainan Airlines
02 Dec - 09 Dec	China Eastern
04 Dec - 08 Dec	China Eastern
07 Dec - 14 Dec	China Eastern
05 Dec - 14 Dec	China Eastern
02 Dec - 11 Dec	China Eastern
28 Dec - 31 Dec	Scandinavian Airlines
09 Dec - 16 Dec	China Eastern
09 Dec - 06 Jan	Hainan Airlines
01 Dec - 10 Jan	Air China
02 Dec - 11 Jan	Air China
31 Dec - 06 Jan	Air China
30 Dec - 07 Jan	Air China
30 Dec - 06 Jan	Air China
27 Dec - 13 Jan	LOT
30 Dec - 02 Jan	Hainan Airlines
25 Dec - 16 Jan	Finnair
25 Dec - 11 Jan	Finnair

Also check the deals for one-way flights from Madrid 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 Madrid to Seoul in December from 465€

Return flights