Cheapest one-way flights from Philadelphia to San Juan in January from 59€

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

One-Way flights

18 Jan Frontier Airlines
20 Jan Frontier Airlines
21 Jan Frontier Airlines
09 Jan Frontier Airlines
06 Jan Frontier Airlines direct
08 Jan Spirit Airlines
05 Jan Frontier Airlines
13 Jan Spirit Airlines
17 Jan Spirit Airlines
29 Jan Spirit 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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