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

Return flights

25 Aug - 28 Aug	Allegiant Air
01 Aug - 07 Aug	Allegiant Air
11 Aug - 15 Aug	Allegiant Air
22 Aug - 25 Aug	Allegiant Air
10 Aug - 14 Aug	Allegiant Air
04 Aug - 08 Aug	Allegiant Air
11 Aug - 31 Aug	Allegiant Air
22 Aug - 31 Aug	Allegiant Air
11 Aug - 02 Sep	Allegiant Air
25 Aug - 31 Aug	Allegiant Air
22 Aug - 26 Aug	Allegiant Air
29 Aug - 02 Sep	Allegiant Air
29 Aug - 01 Sep	Allegiant Air

Also check the deals for one-way flights from Newburgh 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 Newburgh to San Juan in August from $283

Return flights