AirHint found the following cheapest return flights from Seoul (GMP) to Barcelona (BCN) in September 2026 (see full year).

Return flights

11 Sep - 18 Sep	Air China
10 Sep - 18 Sep	Air China
10 Sep - 22 Sep	Air China
15 Sep - 22 Sep	Air China
12 Sep - 19 Sep	Air China
12 Sep - 21 Sep	Air China
13 Sep - 21 Sep	Air China
12 Sep - 16 Sep	Air China
11 Sep - 16 Sep	Air China
12 Sep - 09 Oct	Air China
01 Sep - 15 Sep	Air China
27 Sep - 02 Oct	Air China
27 Sep - 03 Oct	Air China
21 Sep - 03 Oct	Air China
26 Sep - 05 Oct	Air China
18 Sep - 10 Oct	Air China
30 Sep - 18 Oct	Air China
30 Sep - 10 Oct	Air China
21 Sep - 04 Oct	Air China
20 Sep - 02 Oct	Japan Airlines

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.

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Cheapest return flights from Seoul to Barcelona in September from $737

Return flights