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

Return flights

08 Dec - 16 Dec	China Eastern
03 Dec - 10 Dec	LOT
06 Dec - 16 Dec	LOT
07 Dec - 16 Dec	LOT
01 Dec - 13 Dec	LOT
06 Dec - 13 Dec	LOT
14 Dec - 31 Dec	Scandinavian Airlines
04 Dec - 14 Dec	Lufthansa
02 Dec - 14 Dec	Lufthansa
04 Dec - 11 Dec	Air France
30 Dec - 29 Jan	Lufthansa
30 Dec - 10 Jan	Iberia Express
30 Dec - 09 Jan	Iberia Express
25 Dec - 15 Jan	Finnair
25 Dec - 13 Jan	Finnair
27 Dec - 13 Jan	Finnair
25 Dec - 01 Jan	Finnair
24 Dec - 14 Jan	Iberia
28 Dec - 03 Jan	Korean Air	direct
27 Dec - 03 Jan	Korean Air	direct

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 523€

Return flights