Cheapest return flights from Philadelphia to San Juan in May from 112€

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

05 May - 20 May Frontier Airlines
13 May - 17 May Frontier Airlines
03 May - 05 May Frontier Airlines
05 May - 12 May Frontier Airlines
06 May - 13 May Frontier Airlines
05 May - 10 May Frontier Airlines
10 May - 12 May Frontier Airlines
03 May - 07 May Frontier Airlines
14 May - 17 May Frontier Airlines
06 May - 10 May Frontier Airlines
20 May - 03 Jun Frontier Airlines
29 May - 03 Jun Frontier Airlines direct
30 May - 03 Jun Frontier Airlines direct
29 May - 01 Jun Frontier Airlines direct
30 May - 07 Jun Frontier Airlines direct
24 May - 02 Jun Frontier Airlines direct
23 May - 02 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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