Cheapest return flights from Philadelphia to San Juan in January from $114

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

Return flights

17 Jan - 24 Jan Frontier Airlines
10 Jan - 15 Jan Frontier Airlines
22 Jan - 29 Jan Frontier Airlines
24 Jan - 29 Jan Frontier Airlines
08 Jan - 12 Jan Frontier Airlines
08 Jan - 15 Jan Frontier Airlines
10 Jan - 13 Jan Frontier Airlines
06 Jan - 14 Jan Frontier Airlines
22 Jan - 24 Jan Frontier Airlines
08 Jan - 16 Jan Frontier Airlines
28 Jan - 01 Feb Frontier Airlines direct
31 Jan - 07 Feb Frontier Airlines
28 Jan - 02 Feb Frontier Airlines direct
31 Jan - 07 Feb Frontier Airlines direct
29 Jan - 01 Feb Frontier Airlines direct
16 Jan - 19 Feb Spirit Airlines
30 Jan - 01 Feb Frontier Airlines direct
04 Jan - 15 Feb Frontier Airlines direct
29 Jan - 06 Feb Spirit Airlines direct
29 Jan - 10 Feb Spirit Airlines direct

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

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