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

Return flights

21 Oct - 28 Oct	LOT
01 Oct - 10 Oct	LOT
25 Oct - 08 Nov	LOT
14 Oct - 21 Oct	Air China
14 Oct - 31 Oct	Air China
14 Oct - 28 Oct	Air China
15 Oct - 28 Oct	Air China
14 Oct - 24 Oct	Air China
14 Oct - 14 Nov	Air China
15 Oct - 14 Nov	Air China
22 Oct - 29 Oct	Iberia
20 Oct - 31 Oct	Iberia
27 Oct - 07 Nov	Iberia
30 Oct - 05 Nov	Iberia
26 Oct - 06 Nov	Etihad Airways
19 Oct - 23 Oct	Aer Lingus
19 Oct - 20 Nov	Aer Lingus
14 Oct - 03 Nov	Air China
31 Oct - 11 Nov	Air China
23 Oct - 09 Nov	Etihad Airways

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 $643

Return flights