Cheapest return flights from Philadelphia to San Juan in December from 122€

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

Return flights

04 Dec - 08 Dec Frontier Airlines direct
05 Dec - 10 Dec Frontier Airlines direct
05 Dec - 09 Dec Frontier Airlines direct
10 Dec - 15 Dec Frontier Airlines direct
08 Dec - 15 Dec Frontier Airlines direct
07 Dec - 14 Dec Frontier Airlines direct
06 Dec - 14 Dec Frontier Airlines direct
12 Dec - 14 Dec Frontier Airlines direct
04 Dec - 07 Dec Frontier Airlines direct
06 Dec - 13 Dec Frontier Airlines direct
31 Dec - 07 Jan Spirit Airlines
30 Dec - 07 Jan Frontier Airlines
29 Dec - 14 Jan Spirit Airlines
29 Dec - 15 Jan Spirit Airlines
29 Dec - 16 Jan Spirit Airlines
29 Dec - 17 Jan Spirit Airlines
29 Dec - 08 Jan Spirit Airlines
30 Dec - 14 Jan Spirit Airlines
30 Dec - 15 Jan Spirit Airlines
30 Dec - 16 Jan Spirit 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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