Cheapest return flights from Philadelphia to San Juan in May from $137

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

Return flights

16 May - 19 May Frontier Airlines direct
07 May - 11 May Frontier Airlines direct
09 May - 12 May Frontier Airlines direct
05 May - 12 May Frontier Airlines direct
09 May - 13 May Spirit Airlines direct
20 May - 27 May Spirit Airlines direct
04 May - 11 May Spirit Airlines direct
19 May - 27 May Spirit Airlines direct
03 May - 05 May Spirit Airlines direct
03 May - 14 May Spirit Airlines direct
26 May - 03 Jun Spirit Airlines direct
27 May - 02 Jun Spirit Airlines direct
19 May - 02 Jun Spirit Airlines direct
12 May - 02 Jun Spirit Airlines direct
26 May - 02 Jun Spirit Airlines direct
13 May - 02 Jun Spirit Airlines direct
18 May - 03 Jun Spirit Airlines direct
18 May - 02 Jun Spirit Airlines direct
17 May - 03 Jun Spirit Airlines direct
17 May - 02 Jun Spirit 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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