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

Return flights

30 Aug - 08 Sep	Air Europa
28 Aug - 08 Sep	Air Europa
01 Aug - 12 Aug	United
15 Aug - 30 Aug	Vueling Airlines
10 Aug - 14 Aug	Air Europa
15 Aug - 24 Aug	Vueling Airlines
14 Aug - 31 Aug	Vueling Airlines
03 Aug - 16 Aug	Vueling Airlines
08 Aug - 24 Aug	Vueling Airlines
12 Aug - 25 Aug	Iberia
15 Aug - 31 Aug	Vueling Airlines
05 Aug - 06 Aug	Vueling Airlines

Also check the deals for one-way flights from Bilbao to San Juan 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 San Juan in August from 751€

Return flights