Cheapest one-way flights from Philadelphia to San Juan in September from $86

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

One-Way flights

14 Sep Spirit Airlines direct
07 Sep Spirit Airlines
06 Sep Spirit Airlines
30 Sep Spirit Airlines
24 Sep Spirit Airlines
16 Sep Spirit Airlines
18 Sep Frontier Airlines direct
17 Sep Spirit Airlines
22 Sep Frontier Airlines
08 Sep Frontier Airlines

Also check the deals for return flights from Philadelphia to San Juan in September.

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Feel free to contact us with any feedback or request another flight research.