Cheapest return flights from Philadelphia to San Juan in December from $154

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

Return flights

08 Dec - 15 Dec Frontier Airlines direct
03 Dec - 14 Dec Spirit Airlines direct
10 Dec - 14 Dec Spirit Airlines direct
03 Dec - 13 Dec Spirit Airlines direct
03 Dec - 08 Dec Spirit Airlines direct
06 Dec - 14 Dec Frontier Airlines direct
06 Dec - 13 Dec Frontier Airlines direct
13 Dec - 16 Dec Frontier Airlines direct
05 Dec - 08 Dec Frontier Airlines direct
05 Dec - 07 Dec Frontier Airlines direct
15 Dec - 15 Jan Frontier Airlines direct
31 Dec - 10 Jan Spirit Airlines direct
31 Dec - 14 Jan Spirit Airlines direct
31 Dec - 16 Jan Spirit Airlines direct
31 Dec - 17 Jan Spirit Airlines direct
31 Dec - 15 Jan Spirit Airlines direct
31 Dec - 21 Jan Spirit Airlines
29 Dec - 10 Jan Spirit Airlines direct
29 Dec - 14 Jan Spirit Airlines direct
29 Dec - 16 Jan Spirit Airlines direct

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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