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

Return flights

23 Aug - 30 Aug	Avelo Airlines
03 Aug - 11 Aug	Avelo Airlines
23 Aug - 30 Aug	Avelo Airlines	direct
02 Aug - 06 Aug	Avelo Airlines
24 Aug - 26 Aug	Avelo Airlines
23 Aug - 25 Aug	Avelo Airlines
23 Aug - 25 Aug	Avelo Airlines	direct
04 Aug - 13 Aug	Avelo Airlines
02 Aug - 06 Aug	Avelo Airlines	direct

Also check the deals for one-way flights from New Haven 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 New Haven to San Juan in August from $336

Return flights