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

Return flights

07 Sep - 14 Sep	Vueling Airlines
04 Sep - 14 Sep	easyJet
06 Sep - 14 Sep	Ryanair
01 Sep - 14 Sep	Ryanair
12 Sep - 22 Sep	Air China
13 Sep - 22 Sep	Air China
08 Sep - 21 Sep	Air China
01 Sep - 22 Sep	Air China
10 Sep - 21 Sep	Air China
03 Sep - 21 Sep	Air China
13 Sep - 01 Oct	Air China
30 Sep - 11 Oct	LOT
17 Sep - 01 Oct	easyJet
29 Sep - 19 Oct	LOT
24 Sep - 08 Oct	Air China
15 Sep - 13 Oct	Air France
21 Sep - 12 Oct	Etihad Airways
27 Sep - 07 Oct	LOT
30 Sep - 07 Oct	LOT
29 Sep - 06 Oct	KLM

Also check the deals for one-way flights from Barcelona to Seoul 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 Barcelona to Seoul in September from 546€

Return flights