Cheapest return JAX–PHL flights, May

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

Return flights

29 May - 31 May Frontier Airlines direct
29 May - 01 Jun Frontier Airlines direct
24 May - 27 May Frontier Airlines
15 May - 29 May Frontier Airlines
22 May - 25 May Frontier Airlines
16 May - 29 May Southwest Airlines

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

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