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

Return flights

10 May - 21 May	Air China
12 May - 28 May	Air China
03 May - 28 May	Air China
20 May - 02 Jun	Air China
19 May - 04 Jun	Air China
29 May - 14 Jun	Air China
29 May - 04 Jun	Air China
28 May - 09 Jun	Air China
29 May - 10 Jun	Air China
28 May - 07 Jun	Air China
29 May - 08 Jun	Air China
14 May - 04 Jun	Air China
05 May - 20 May	Air China
29 May - 11 Jun	Air China
03 May - 10 May	Air China
08 May - 20 May	Air China
08 May - 22 May	Air China
19 May - 29 May	Air China
08 May - 21 May	Air China
08 May - 25 May	Air China

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 $716

Return flights