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

Return flights

01 Aug - 04 Aug	Frontier Airlines
09 Aug - 16 Aug	Frontier Airlines	direct
04 Aug - 08 Aug	Frontier Airlines
17 Aug - 20 Aug	Spirit Airlines
02 Aug - 06 Aug	Frontier Airlines
03 Aug - 10 Aug	Frontier Airlines	direct
28 Aug - 31 Aug	Frontier Airlines
24 Aug - 31 Aug	Frontier Airlines
19 Aug - 26 Aug	Southwest Airlines
09 Aug - 17 Aug	Spirit Airlines

Also check the deals for one-way flights from Windsor Locks 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 Windsor Locks to San Juan in August from $245

Return flights