Cheapest return flights from Philadelphia to San Juan in September from 119€

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

Return flights

21 Sep - 02 Oct Spirit Airlines direct
28 Sep - 01 Oct Frontier Airlines direct
21 Sep - 25 Sep Frontier Airlines direct
28 Sep - 04 Oct Frontier Airlines direct
27 Sep - 04 Oct Frontier Airlines direct
22 Sep - 02 Oct Spirit Airlines
21 Sep - 07 Oct Spirit Airlines
28 Sep - 02 Oct Spirit Airlines direct
24 Sep - 29 Sep Frontier Airlines direct
21 Sep - 09 Oct Spirit Airlines direct
21 Sep - 03 Oct Spirit Airlines
30 Sep - 08 Oct Frontier Airlines direct
26 Sep - 28 Sep Frontier Airlines direct
25 Sep - 28 Sep Frontier Airlines direct
20 Sep - 27 Sep Frontier Airlines direct
21 Sep - 29 Sep Spirit Airlines
23 Sep - 24 Sep Frontier Airlines direct
19 Sep - 26 Sep Frontier Airlines direct
20 Sep - 24 Sep Frontier Airlines direct
29 Sep - 30 Sep Frontier Airlines direct

Also check the deals for one-way 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.