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

Return flights

07 Sep - 13 Sep	Air China
12 Sep - 18 Sep	Air China
18 Sep - 24 Sep	Air China
10 Sep - 24 Sep	Air China
17 Sep - 24 Sep	Air China
09 Sep - 24 Sep	Air China
21 Sep - 20 Oct	Air China
16 Sep - 14 Oct	Air China
10 Sep - 20 Sep	Air China
18 Sep - 27 Sep	Air China
07 Sep - 20 Sep	Air China
17 Sep - 23 Sep	Air China
17 Sep - 15 Oct	Air China
20 Sep - 01 Oct	Air China
30 Sep - 13 Oct	EVA Air
29 Sep - 16 Oct	Air China
29 Sep - 15 Oct	Air China
19 Sep - 08 Oct	EVA Air
26 Sep - 08 Oct	EVA Air
28 Sep - 04 Oct	Air China

Also check the deals for one-way flights from Seoul 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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Seoul to Barcelona in September from $781

Return flights