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

Return flights

19 May - 26 May	LOT
01 May - 13 May	Scandinavian Airlines
01 May - 11 May	Scandinavian Airlines
04 May - 12 May	LOT
12 May - 19 May	KLM
12 May - 25 May	KLM
18 May - 25 May	KLM
07 May - 15 May	Air France
01 May - 09 May	Scandinavian Airlines
05 May - 15 May	Air France
22 May - 05 Jun	Iberia
29 May - 11 Jun	Qatar Airways
22 May - 05 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Madrid to Seoul in May from $645

Return flights