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

Return flights

30 Aug - 08 Sep	Etihad Airways
19 Aug - 10 Sep	Iberia
05 Aug - 26 Aug	Iberia
19 Aug - 05 Sep	Iberia
04 Aug - 15 Aug	Vueling Airlines
01 Aug - 21 Aug	Iberia
04 Aug - 17 Aug	Vueling Airlines
09 Aug - 08 Sep	Vueling Airlines
12 Aug - 23 Aug	Wizz Air Malta
03 Aug - 16 Aug	Vueling Airlines
01 Aug - 29 Aug	Iberia
10 Aug - 17 Aug	Vueling Airlines
11 Aug - 18 Aug	Iberia

Also check the deals for one-way flights from Bilbao 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 Bilbao to Seoul in August from $841

Return flights