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

Return flights

29 May - 11 Jun	Scandinavian Airlines
31 May - 16 Jun	LOT
11 May - 25 May	LOT
27 May - 09 Jun	LOT
27 May - 08 Jun	LOT
15 May - 24 May	Air China
02 May - 16 May	Air China
31 May - 17 Jun	LOT
12 May - 25 May	LOT
01 May - 07 May	Air China
03 May - 09 May	Air China
15 May - 15 Jun	Air China
14 May - 24 May	Air China
29 May - 04 Jun	Air China
29 May - 25 Jun	Air China
22 May - 31 May	Air China
01 May - 31 May	Air China
24 May - 31 May	Air China
28 May - 09 Jun	Air China
08 May - 04 Jun	Iberia

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 535€

Return flights