Cheapest one-way flights from Philadelphia to San Juan in December from $76

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

One-Way flights

08 Dec Frontier Airlines direct
03 Dec Spirit Airlines direct
05 Dec Frontier Airlines direct
07 Dec Spirit Airlines
07 Dec Frontier Airlines direct
09 Dec Frontier Airlines direct
14 Dec Frontier Airlines direct
31 Dec Spirit Airlines direct
12 Dec Frontier Airlines
04 Dec Frontier Airlines

Also check the deals for return flights from Philadelphia to San Juan in December.

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.