Cheapest one-way flights from Philadelphia to San Juan in January from $58

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

One-Way flights

03 Jan Frontier Airlines direct
11 Jan Spirit Airlines
25 Jan Frontier Airlines direct
13 Jan Frontier Airlines direct
26 Jan Frontier Airlines direct
27 Jan Frontier Airlines direct
28 Jan Frontier Airlines direct
29 Jan Spirit Airlines
24 Jan Spirit Airlines
31 Jan Spirit Airlines

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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