Cheapest return flights from Philadelphia to San Juan in August from 252€

Best time to book flights for Philadelphia (PHL) to San Juan (SJU) flights at AirHint

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

Return flights

02 Aug - 12 Aug Frontier Airlines direct
06 Aug - 12 Aug Frontier Airlines direct
05 Aug - 11 Aug Frontier Airlines direct
11 Aug - 14 Aug Frontier Airlines direct
02 Aug - 03 Aug Frontier Airlines direct
03 Aug - 06 Aug Frontier Airlines direct
10 Aug - 13 Aug Frontier Airlines direct
03 Aug - 08 Aug Frontier Airlines direct
07 Aug - 11 Aug Frontier Airlines direct
01 Aug - 11 Aug Frontier Airlines direct
28 Aug - 05 Sep Southwest Airlines
28 Aug - 02 Sep Southwest Airlines
30 Aug - 02 Sep Southwest Airlines

Also check the deals for one-way 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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