Cheapest return flights from Philadelphia to San Juan in August from $309

Best time to book flights for Philadelphia (PHL) to San Juan (SJU) flights at AirHint

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

Return flights

01 Aug - 05 Aug Frontier Airlines direct
08 Aug - 12 Aug Frontier Airlines direct
09 Aug - 15 Aug Frontier Airlines direct
15 Aug - 18 Aug Frontier Airlines direct
17 Aug - 31 Aug Frontier Airlines
28 Aug - 02 Sep American Airlines
07 Aug - 10 Aug Frontier Airlines direct
22 Aug - 24 Aug jetBlue
04 Aug - 08 Aug Spirit Airlines direct
07 Aug - 11 Aug Spirit Airlines direct
01 Aug - 06 Aug Spirit Airlines direct

Also check the deals for one-way flights from Philadelphia to San Juan in August.

Skyscanner

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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