Cheapest return flights from Philadelphia to San Juan in December from 318€

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

Return flights

02 Dec - 05 Dec Delta
06 Dec - 09 Dec Southwest Airlines
15 Dec - 20 Dec Southwest Airlines
31 Dec - 10 Jan Southwest Airlines
01 Dec - 05 Dec Southwest Airlines
20 Dec - 28 Dec jetBlue
30 Dec - 02 Jan Southwest Airlines
29 Dec - 05 Jan Southwest Airlines
25 Dec - 02 Jan Southwest Airlines
23 Dec - 31 Dec Southwest Airlines
21 Dec - 28 Dec Southwest Airlines
27 Dec - 03 Jan Southwest Airlines

Also check the deals for one-way 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.

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