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

Return flights

26 Apr - 14 May	KLM
21 Apr - 01 May	Iberia
30 Apr - 12 May	Iberia
15 Apr - 13 May	Iberia
16 Apr - 14 May	Iberia
30 Apr - 08 May	Iberia
24 Apr - 15 May	Air France
08 Apr - 16 Apr	LOT
19 Apr - 29 Apr	Iberia
21 Apr - 10 May	Iberia
06 Apr - 20 Apr	LOT
03 Apr - 16 Apr	Iberia
09 Apr - 17 Apr	Qatar Airways
03 Apr - 17 Apr	Iberia
01 Apr - 11 Apr	KLM
02 Apr - 11 Apr	Turkish Airlines
06 Apr - 19 Apr	Turkish Airlines
09 Apr - 17 Apr	Korean Air	direct
30 Apr - 10 May	Korean Air	direct
21 Apr - 10 May	Korean Air	direct

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

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 April from $693

Return flights