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

Return flights

28 Sep - 05 Oct	China Eastern
17 Sep - 20 Sep	China Eastern
02 Sep - 15 Sep	Air China
05 Sep - 15 Sep	Air China
16 Sep - 25 Sep	Air China
07 Sep - 15 Sep	Air China
14 Sep - 25 Sep	Air China
12 Sep - 25 Sep	Air China
07 Sep - 20 Sep	Air China
07 Sep - 22 Sep	Air China
07 Sep - 13 Sep	Air China
14 Sep - 04 Oct	Air China
11 Sep - 17 Oct	Air China
21 Sep - 08 Oct	Etihad Airways
22 Sep - 02 Oct	KLM
21 Sep - 03 Oct	Etihad Airways
23 Sep - 04 Oct	Air China
23 Sep - 02 Oct	Air China
27 Sep - 12 Oct	Etihad Airways
22 Sep - 01 Oct	KLM

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 $519

Return flights