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

Return flights

25 Aug - 04 Sep	Delta
20 Aug - 27 Aug	KLM
14 Aug - 18 Aug	Ryanair
15 Aug - 18 Aug	United
11 Aug - 23 Aug	KLM
18 Aug - 24 Aug	KLM
16 Aug - 24 Aug	British Airways
14 Aug - 23 Aug	Ryanair
12 Aug - 19 Aug	Delta
15 Aug - 26 Aug	Air France
15 Aug - 22 Aug	United

Also check the deals for one-way flights from Naples 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 Naples to San Juan in August from $814

Return flights