Cheapest one-way flights from Philadelphia to San Juan in December from 92€

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

One-Way flights

08 Dec Frontier Airlines direct
03 Dec Frontier Airlines direct
07 Dec Spirit Airlines direct
05 Dec Spirit Airlines direct
11 Dec Spirit Airlines direct
04 Dec Frontier Airlines direct
13 Dec Frontier Airlines direct
14 Dec Spirit Airlines direct
31 Dec Spirit Airlines direct
15 Dec Spirit Airlines

Also check the deals for return flights from Philadelphia to San Juan in December.

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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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