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

Return flights

31 May - 11 Jun	Scandinavian Airlines
05 May - 19 May	LOT
12 May - 25 May	LOT
13 May - 25 May	LOT
14 May - 26 May	Etihad Airways
21 May - 27 May	Air China
21 May - 28 May	Air China
22 May - 28 May	Air China
01 May - 09 May	Air China
25 May - 31 May	Air China
14 May - 21 May	Etihad Airways
29 May - 04 Jun	Air China
28 May - 05 Jun	Air China
29 May - 06 Jun	Air China
29 May - 02 Jun	Air China
22 May - 01 Jun	Air China
29 May - 18 Jun	Air China
22 May - 02 Jun	Air China
31 May - 25 Jun	Air China
30 May - 15 Jun	Iberia Express

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 $618

Return flights