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

Return flights

17 Sep - 24 Sep	Air China
08 Sep - 12 Sep	Asiana Airlines
11 Sep - 18 Sep	Asiana Airlines
18 Sep - 02 Oct	Singapore Airlines
10 Sep - 17 Sep	Korean Air
19 Sep - 24 Sep	Korean Air
09 Sep - 11 Sep	Korean Air
22 Sep - 29 Sep	Air China
17 Sep - 27 Sep	Air China
25 Sep - 14 Oct	Korean Air
24 Sep - 02 Oct	Korean Air
27 Sep - 12 Oct	Air China
27 Sep - 04 Oct	Air China
27 Sep - 09 Oct	Air China
28 Sep - 09 Oct	Air China
20 Sep - 26 Sep	Air China
18 Sep - 30 Sep	Japan Airlines
29 Sep - 09 Oct	Air China
30 Sep - 09 Oct	Korean Air
30 Sep - 07 Oct	Air China

Also check the deals for one-way flights from Busan to Barcelona 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 Barcelona in September from 595€

Return flights