Cheapest return flights from Philadelphia to San Juan in January from $191

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

Return flights

04 Jan - 10 Jan Frontier Airlines direct
05 Jan - 11 Jan Frontier Airlines
11 Jan - 16 Jan Frontier Airlines
04 Jan - 09 Jan Frontier Airlines direct
11 Jan - 21 Jan Frontier Airlines
05 Jan - 11 Jan Frontier Airlines direct
05 Jan - 12 Jan Frontier Airlines
05 Jan - 09 Jan Frontier Airlines direct
05 Jan - 12 Jan Frontier Airlines direct
04 Jan - 08 Jan Frontier Airlines
27 Jan - 20 Feb Frontier Airlines direct
25 Jan - 11 Feb Spirit Airlines
31 Jan - 11 Feb Spirit Airlines
24 Jan - 11 Feb Spirit Airlines
22 Jan - 11 Feb Spirit Airlines
29 Jan - 11 Feb Spirit Airlines
25 Jan - 01 Feb Frontier Airlines direct
24 Jan - 01 Feb Spirit Airlines
26 Jan - 11 Feb Spirit Airlines
04 Jan - 15 Feb Frontier Airlines

Also check the deals for one-way flights from Philadelphia to San Juan in January.

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