Cheapest one-way flights from Philadelphia to San Juan in August from $91

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

One-Way flights

20 Aug Frontier Airlines
21 Aug Frontier Airlines
05 Aug Frontier Airlines
09 Aug Frontier Airlines
27 Aug Frontier Airlines
16 Aug Frontier Airlines
17 Aug Frontier Airlines direct
19 Aug Frontier Airlines
21 Aug Spirit Airlines direct
20 Aug Spirit Airlines direct

Also check the deals for return 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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