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

Return flights

06 Dec - 12 Dec	Air China
03 Dec - 13 Dec	Air China
04 Dec - 13 Dec	Air China
06 Dec - 22 Dec	Air China
02 Dec - 10 Dec	Air China
06 Dec - 15 Dec	Air China
06 Dec - 16 Dec	Air China
06 Dec - 17 Dec	Air China
06 Dec - 14 Dec	Air China
06 Dec - 13 Dec	Air China
30 Dec - 11 Jan	Air China
30 Dec - 07 Jan	Air China
18 Dec - 08 Jan	Air China
25 Dec - 01 Jan	Iberia
24 Dec - 07 Jan	Iberia
23 Dec - 01 Jan	Iberia
25 Dec - 05 Jan	Iberia
31 Dec - 04 Jan	Iberia
24 Dec - 05 Jan	Iberia
26 Dec - 09 Jan	easyJet

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 $624

Return flights