Cheapest return flights from Philadelphia to San Juan in May from $129

Best time to book flights for Philadelphia (PHL) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest return flights from Philadelphia (PHL) to San Juan (SJU) in May 2025 (see full year).

Return flights

06 May - 09 May Spirit Airlines
06 May - 10 May Spirit Airlines
09 May - 16 May Spirit Airlines direct
04 May - 14 May Frontier Airlines direct
03 May - 04 May Spirit Airlines direct
08 May - 15 May Spirit Airlines direct
03 May - 08 May Spirit Airlines direct
04 May - 06 May Frontier Airlines direct
11 May - 16 May Spirit Airlines direct
05 May - 11 May Spirit Airlines direct
21 May - 17 Jun Spirit Airlines direct
26 May - 02 Jun Frontier Airlines direct
29 May - 03 Jun Frontier Airlines direct
30 May - 03 Jun Frontier Airlines direct
25 May - 15 Jun Frontier Airlines
29 May - 02 Jun Frontier Airlines direct
29 May - 04 Jun Frontier Airlines direct
29 May - 01 Jun Frontier Airlines direct
30 May - 01 Jun Frontier Airlines direct
25 May - 15 Jun Frontier Airlines direct

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

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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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