Cheapest return flights from Philadelphia to San Juan in December from 181€

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

Return flights

08 Dec - 11 Dec Frontier Airlines direct
08 Dec - 12 Dec Frontier Airlines direct
01 Dec - 05 Dec Frontier Airlines direct
05 Dec - 09 Dec Frontier Airlines direct
05 Dec - 11 Dec Frontier Airlines direct
04 Dec - 09 Dec Frontier Airlines direct
05 Dec - 08 Dec Frontier Airlines direct
02 Dec - 03 Dec Spirit Airlines direct
03 Dec - 10 Dec Frontier Airlines direct
08 Dec - 15 Dec Frontier Airlines direct
31 Dec - 14 Jan Spirit Airlines direct
12 Dec - 18 Jan Frontier Airlines direct
31 Dec - 07 Jan Frontier Airlines
31 Dec - 10 Jan Spirit Airlines direct
31 Dec - 16 Jan Spirit Airlines direct
31 Dec - 11 Jan Spirit Airlines direct
31 Dec - 15 Jan Spirit Airlines direct
31 Dec - 17 Jan Spirit Airlines direct
31 Dec - 13 Jan Spirit Airlines
31 Dec - 21 Jan Spirit Airlines

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

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