AirHint found the following cheapest return flights from Busan (PUS) to Madrid (MAD) in September 2025 (see full year).

Return flights

12 Sep - 21 Sep	Air China
10 Sep - 20 Sep	Air China
03 Sep - 24 Sep	Air China
11 Sep - 20 Sep	Air China
11 Sep - 25 Sep	Air China
23 Sep - 15 Oct	Air China
13 Sep - 20 Sep	Air China
03 Sep - 06 Sep	Air China
03 Sep - 10 Sep	Air China
05 Sep - 12 Sep	Air China
06 Sep - 13 Sep	Air China
28 Sep - 03 Oct	Korean Air
25 Sep - 09 Oct	Air China
27 Sep - 11 Oct	Japan Airlines
30 Sep - 12 Oct	Air China
29 Sep - 10 Oct	Air China
28 Sep - 09 Oct	Air China
26 Sep - 09 Oct	Air China
28 Sep - 12 Oct	Air China
27 Sep - 10 Oct	Air China

Also check the deals for one-way flights from Busan 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 Busan to Madrid in September from 463€

Return flights