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

Return flights

05 Sep - 15 Sep	Air China
15 Sep - 25 Sep	Air China
07 Sep - 13 Sep	Air China
12 Sep - 18 Sep	Air China
12 Sep - 25 Sep	Air China
14 Sep - 27 Sep	Air China
19 Sep - 04 Oct	Air China
19 Sep - 29 Sep	Air China
23 Sep - 04 Oct	Air China
21 Sep - 04 Oct	Air China
02 Sep - 16 Sep	Air China
10 Sep - 20 Sep	Air China
09 Sep - 14 Sep	Air China
17 Sep - 03 Oct	Air China
28 Sep - 04 Oct	Air China
18 Sep - 02 Oct	Air China
27 Sep - 06 Oct	Finnair
23 Sep - 05 Oct	Air China
21 Sep - 10 Oct	Air China
21 Sep - 09 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.

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Cheapest return flights from Seoul to Barcelona in September from $569

Return flights