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

Return flights

01 Dec - 19 Dec	Air China
06 Dec - 15 Dec	Air China
01 Dec - 15 Dec	Air China
01 Dec - 22 Dec	Air China
04 Dec - 18 Dec	Air China
01 Dec - 06 Dec	Air China
01 Dec - 13 Dec	Air China
02 Dec - 14 Dec	Air China
05 Dec - 23 Dec	Air China
08 Dec - 13 Dec	Air China
07 Dec - 22 Jan	Air China
09 Dec - 24 Jan	Air China
07 Dec - 25 Jan	Air China
06 Dec - 06 Jan	Air China
10 Dec - 25 Jan	Lufthansa
11 Dec - 25 Jan	Lufthansa
29 Dec - 11 Jan	Lufthansa
21 Dec - 14 Jan	Lufthansa
23 Dec - 16 Jan	Lufthansa
10 Dec - 11 Jan	Lufthansa

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 $619

Return flights