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

Return flights

17 Aug - 02 Sep	United
17 Aug - 28 Aug	Virgin Atlantic
20 Aug - 02 Sep	United
20 Aug - 27 Aug	United
14 Aug - 21 Aug	United
18 Aug - 25 Aug	United
22 Aug - 29 Aug	United
20 Aug - 01 Sep	Iberia
24 Aug - 31 Aug	United
27 Aug - 03 Sep	United
06 Aug - 13 Aug	United
16 Aug - 23 Aug	United
08 Aug - 15 Aug	United
04 Aug - 11 Aug	United
30 Aug - 06 Sep	United

Also check the deals for one-way flights from San Juan 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 San Juan to Barcelona in August from $452

Return flights