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

Return flights

09 Dec - 19 Dec	Hainan Airlines
07 Dec - 21 Dec	Air China
01 Dec - 10 Dec	Air China
01 Dec - 07 Dec	Air China
09 Dec - 14 Dec	Air China
02 Dec - 14 Dec	Air China
06 Dec - 16 Dec	Air China
04 Dec - 11 Dec	Air China
07 Dec - 16 Dec	Air China
05 Dec - 14 Dec	Air China
29 Dec - 08 Jan	Lufthansa
23 Dec - 03 Jan	Lufthansa
24 Dec - 04 Jan	Vueling Airlines
23 Dec - 04 Jan	Lufthansa
13 Dec - 03 Jan	Lufthansa
22 Dec - 01 Jan	Ryanair
27 Dec - 04 Jan	Hainan Airlines
27 Dec - 01 Jan	Hainan Airlines
25 Dec - 01 Jan	Iberia
20 Dec - 05 Jan	Hainan Airlines

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 495€

Return flights