AirHint found the following cheapest return flights from Madrid (MAD) to Seoul (ICN) in May 2026 (see full year).

Return flights

03 May - 11 May	Scandinavian Airlines
03 May - 25 May	Scandinavian Airlines
12 May - 25 May	Scandinavian Airlines
31 May - 16 Jun	LOT
19 May - 26 May	LOT
06 May - 26 May	LOT
15 May - 28 May	Scandinavian Airlines
01 May - 23 May	Scandinavian Airlines
07 May - 23 May	Air China
01 May - 07 May	Cathay Pacific
01 May - 14 May	KLM
31 May - 16 Jun	Korean Air	direct

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

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 May from 533€

Return flights