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

Return flights

28 Aug - 02 Sep	Air China
24 Aug - 31 Aug	Shenzhen Airlines
05 Aug - 26 Aug	Air France
05 Aug - 19 Aug	Air France
03 Aug - 19 Aug	KLM
18 Aug - 20 Aug	Air China
18 Aug - 24 Aug	Air China
18 Aug - 26 Aug	Air China
18 Aug - 27 Aug	Air China
18 Aug - 31 Aug	Air China
18 Aug - 21 Aug	Air China
27 Aug - 06 Sep	Air China
18 Aug - 02 Sep	Air China
25 Aug - 09 Sep	Air China
25 Aug - 01 Sep	Air China
25 Aug - 05 Sep	Air China
27 Aug - 24 Sep	Air China
27 Aug - 03 Sep	Air China
27 Aug - 05 Sep	Air China
25 Aug - 02 Sep	Air China

Also check the deals for one-way flights from Seoul to Barcelona in August.

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 August from 528€

Return flights