Cheapest one-way flights from Philadelphia to San Juan in September from 58€

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

One-Way flights

21 Sep Spirit Airlines direct
28 Sep Spirit Airlines direct
27 Sep Frontier Airlines direct
22 Sep Spirit Airlines
22 Sep Frontier Airlines direct
24 Sep Frontier Airlines direct
26 Sep Frontier Airlines
20 Sep Frontier Airlines
19 Sep Frontier Airlines
18 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.

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