Cheapest one-way flights from Philadelphia to San Juan in January from 73€

AirHint found the following cheapest one-way flights from Philadelphia (PHL) to San Juan (SJU) in January 2026 (see full year).

One-Way flights

11 Jan Spirit Airlines
22 Jan Spirit Airlines
07 Jan Frontier Airlines direct
11 Jan Frontier Airlines direct
18 Jan Frontier Airlines direct
20 Jan Frontier Airlines direct
21 Jan Frontier Airlines direct
25 Jan Frontier Airlines direct
09 Jan Spirit Airlines
26 Jan Frontier Airlines direct

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

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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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