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

Return flights

24 Aug - 01 Sep	Lufthansa
21 Aug - 26 Aug	Lufthansa
25 Aug - 17 Sep	China Southern
20 Aug - 26 Aug	Lufthansa
20 Aug - 29 Aug	Lufthansa
21 Aug - 28 Aug	Shenzhen Airlines
21 Aug - 01 Sep	Shenzhen Airlines
24 Aug - 25 Aug	Lufthansa
20 Aug - 21 Aug	Lufthansa
22 Aug - 29 Aug	T'way Air	direct
21 Aug - 02 Sep	Lufthansa
20 Aug - 22 Aug	SWISS
20 Aug - 23 Aug	SWISS
25 Aug - 01 Sep	China Southern
26 Aug - 03 Sep	Lufthansa
24 Aug - 02 Sep	Lufthansa
21 Aug - 31 Aug	Air China
26 Aug - 07 Sep	Air China
26 Aug - 18 Sep	Air China
27 Aug - 04 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 $636

Return flights