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

Return flights

04 Oct - 17 Oct	Hainan Airlines
20 Oct - 27 Oct	Air China
20 Oct - 28 Oct	Air China
21 Oct - 28 Oct	Air China
28 Oct - 04 Nov	Air China
26 Oct - 07 Nov	Air China
25 Oct - 07 Nov	Air China
28 Oct - 07 Nov	Air China
28 Oct - 25 Nov	Air China
26 Oct - 11 Nov	Air China
01 Oct - 10 Oct	LOT
01 Oct - 11 Oct	LOT
01 Oct - 29 Oct	LOT
01 Oct - 08 Oct	LOT
25 Oct - 03 Nov	LOT
27 Oct - 09 Nov	LOT
30 Oct - 11 Nov	Wizz Air Malta
30 Oct - 08 Nov	Wizz Air Malta
26 Oct - 31 Oct	Air China
20 Oct - 29 Oct	Air China

Also check the deals for one-way flights from Madrid to Seoul in October.

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 October from $614

Return flights