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

Return flights

02 Dec - 10 Dec	China Southern
02 Dec - 09 Dec	China Southern
02 Dec - 11 Dec	China Southern
06 Dec - 15 Dec	China Southern
06 Dec - 17 Dec	China Southern
09 Dec - 23 Dec	China Southern
02 Dec - 14 Dec	China Southern
09 Dec - 16 Dec	China Southern
06 Dec - 14 Dec	China Southern
06 Dec - 08 Dec	China Southern
30 Dec - 13 Jan	Air China
30 Dec - 09 Jan	China Southern
25 Dec - 07 Jan	Iberia
18 Dec - 11 Jan	AJet
23 Dec - 11 Jan	Iberia
18 Dec - 07 Jan	AJet
18 Dec - 10 Jan	AJet
25 Dec - 09 Jan	Iberia
31 Dec - 11 Jan	Air China
19 Dec - 11 Jan	SunExpress

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 442€

Return flights