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

Return flights

20 Aug - 13 Sep	T'way Air
27 Aug - 13 Sep	T'way Air
30 Aug - 05 Sep	T'way Air
25 Aug - 07 Sep	T'way Air
30 Aug - 13 Sep	T'way Air
30 Aug - 08 Sep	T'way Air
20 Aug - 02 Sep	T'way Air
20 Aug - 03 Sep	T'way Air
30 Aug - 06 Sep	T'way Air
25 Aug - 10 Sep	T'way Air
20 Aug - 27 Aug	T'way Air
20 Aug - 27 Aug	T'way Air	direct
22 Aug - 29 Aug	T'way Air
23 Aug - 25 Aug	T'way Air
18 Aug - 25 Aug	T'way Air
20 Aug - 22 Aug	T'way Air
25 Aug - 31 Aug	T'way Air
20 Aug - 31 Aug	T'way Air
19 Aug - 29 Aug	Vueling Airlines
24 Aug - 31 Aug	Etihad Airways

Also check the deals for one-way flights from Barcelona to Seoul 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 Barcelona to Seoul in August from 589€

Return flights