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

Return flights

01 Apr - 15 Apr	Lufthansa
23 Apr - 26 Apr	Air China
23 Apr - 25 Apr	Air China
02 Apr - 09 Apr	Air China
02 Apr - 16 Apr	Air China
19 Apr - 26 Apr	Air China
09 Apr - 18 Apr	Air China
21 Apr - 28 Apr	Air China
21 Apr - 12 May	Air China
25 Apr - 05 May	Air China
21 Apr - 19 May	Air China
26 Apr - 03 May	Air China
22 Apr - 11 May	Air China
29 Apr - 08 May	Air China
25 Apr - 07 May	Air China
30 Apr - 16 May	Air China
30 Apr - 10 May	Air China
17 Apr - 28 May	Air China
11 Apr - 17 Apr	Air China
01 Apr - 10 Apr	Air China

Also check the deals for one-way flights from Seoul to Madrid 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 Seoul to Madrid in April from $649

Return flights