Cheapest one-way flights from Philadelphia to San Juan in March from $57

AirHint found the following cheapest one-way flights from Philadelphia (PHL) to San Juan (SJU) in March 2026 (see full year).

One-Way flights

04 Mar Frontier Airlines
02 Mar Frontier Airlines
04 Mar Frontier Airlines direct
02 Mar Frontier Airlines direct
17 Mar Frontier Airlines direct
18 Mar Spirit Airlines direct
25 Mar Frontier Airlines direct
31 Mar Frontier Airlines direct
09 Mar Frontier Airlines
12 Mar Frontier Airlines

Also check the deals for return flights from Philadelphia to San Juan in March.

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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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