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Cheapest one-way flights from Philadelphia (PHL) to San Juan (SJU), September

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Dates, airline, and price
Dates	Airline	Price
11 Sep	Frontier Airlines Direct Flight
08 Sep	Frontier Airlines Direct Flight
10 Sep	Frontier Airlines
10 Sep	Frontier Airlines Direct Flight

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

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Updated May 23, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Philadelphia (PHL) to San Juan (SJU), September

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