Cheapest one-way flights from Philadelphia to San Juan in September from 83€

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

One-Way flights

29 Sep Frontier Airlines
15 Sep Frontier Airlines
28 Sep Spirit Airlines direct
21 Sep Spirit Airlines direct
18 Sep Spirit Airlines direct
03 Sep Spirit Airlines direct
11 Sep Spirit Airlines direct
07 Sep Spirit Airlines direct
02 Sep Southwest Airlines
05 Sep Southwest 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.

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