Cheapest return flights from Philadelphia to San Juan in December from $153

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

Return flights

11 Dec - 19 Dec Frontier Airlines direct
31 Dec - 07 Jan Frontier Airlines direct
01 Dec - 04 Dec Frontier Airlines
01 Dec - 08 Dec Frontier Airlines
13 Dec - 23 Dec Frontier Airlines direct
15 Dec - 22 Dec Spirit Airlines direct
06 Dec - 08 Dec Frontier Airlines
15 Dec - 20 Dec Spirit Airlines direct
01 Dec - 10 Dec Frontier Airlines direct
01 Dec - 04 Dec Frontier Airlines direct
01 Dec - 05 Dec Frontier Airlines direct
30 Dec - 07 Jan Frontier Airlines
30 Dec - 06 Jan Frontier Airlines
12 Dec - 18 Jan Frontier Airlines direct
13 Dec - 10 Jan Frontier Airlines direct
31 Dec - 08 Jan Spirit Airlines
31 Dec - 16 Jan Spirit Airlines
31 Dec - 15 Jan Spirit Airlines
31 Dec - 17 Jan Spirit Airlines
31 Dec - 06 Jan Spirit Airlines

Also check the deals for one-way flights from Philadelphia to San Juan in December.

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