AirHint found the following cheapest return flights from Philadelphia (PHL) to Naples (NAP) in August 2025 (see full year).

Return flights

25 Aug - 12 Sep	Frontier Airlines
24 Aug - 09 Sep	Frontier Airlines
26 Aug - 20 Sep	Spirit Airlines
24 Aug - 13 Sep	Spirit Airlines
23 Aug - 02 Sep	Spirit Airlines
23 Aug - 28 Aug	Spirit Airlines
31 Aug - 01 Sep	Frontier Airlines
25 Aug - 10 Sep	jetBlue
19 Aug - 26 Aug	jetBlue
27 Aug - 10 Sep	jetBlue
28 Aug - 07 Sep	Delta
19 Aug - 26 Aug	British Airways	direct
25 Aug - 10 Sep	British Airways	direct
23 Aug - 28 Aug	British Airways	direct

Also check the deals for one-way flights from Philadelphia to Naples in August.

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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Cheapest return flights from Philadelphia to Naples in August from 665€

Return flights