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

Return flights

05 Sep - 11 Sep	Air China
15 Sep - 22 Sep	Lufthansa
01 Sep - 15 Sep	Lufthansa
04 Sep - 15 Sep	Air China
10 Sep - 18 Sep	Air China
10 Sep - 20 Sep	Air China
10 Sep - 22 Sep	Air China
06 Sep - 13 Sep	Air China
13 Sep - 25 Sep	Air China
06 Sep - 20 Sep	Air China
25 Sep - 04 Oct	Vietnam Airlines
28 Sep - 07 Oct	Emirates
15 Sep - 06 Oct	Emirates
30 Sep - 10 Oct	Philippine Airlines
23 Sep - 04 Oct	Air China
30 Sep - 11 Oct	Philippine Airlines
29 Sep - 09 Oct	Etihad Airways
27 Sep - 06 Oct	Etihad Airways
15 Sep - 06 Oct	Korean Air	direct
23 Sep - 11 Oct	Scoot

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

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 September from $605

Return flights