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

Return flights

22 Aug - 24 Aug	Frontier Airlines
12 Aug - 15 Aug	Delta
23 Aug - 31 Aug	Spirit Airlines
07 Aug - 11 Aug	Spirit Airlines
23 Aug - 11 Sep	Spirit Airlines
22 Aug - 11 Sep	Spirit Airlines
12 Aug - 17 Aug	Spirit Airlines
12 Aug - 16 Aug	Spirit Airlines
12 Aug - 24 Aug	Spirit Airlines
23 Aug - 24 Aug	Spirit Airlines
07 Aug - 15 Aug	Spirit Airlines
07 Aug - 16 Aug	Spirit Airlines

Also check the deals for one-way flights from Nashville 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 Nashville to San Juan in August from $195

Return flights