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

Return flights

15 Dec - 23 Dec	China Southern
17 Dec - 23 Dec	China Southern
05 Dec - 09 Dec	China Southern
12 Dec - 23 Dec	China Southern
03 Dec - 23 Dec	China Southern
15 Dec - 20 Jan	China Southern
10 Dec - 23 Dec	China Southern
03 Dec - 17 Jan	China Southern
02 Dec - 09 Dec	Air China
19 Dec - 28 Dec	Air China
09 Dec - 16 Dec	Air China
05 Dec - 14 Dec	Air China
25 Dec - 01 Jan	China Eastern
16 Dec - 20 Jan	China Eastern
29 Dec - 13 Jan	Air China
30 Dec - 13 Jan	Air China
30 Dec - 14 Jan	Air China
31 Dec - 14 Jan	Air China
31 Dec - 15 Jan	Air China
29 Dec - 15 Jan	Air China

Also check the deals for one-way flights from Seoul to Madrid 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 Seoul to Madrid in December from $298

Return flights