AirHint found the following cheapest return flights from Islip (ISP) to Charleston (CHS) in July 2025 (see full year).

Return flights

31 Jul - 04 Aug	Breeze Airways
23 Jul - 28 Jul	Breeze Airways	direct
25 Jul - 28 Jul	Breeze Airways	direct
22 Jul - 25 Jul	Breeze Airways
17 Jul - 21 Jul	Breeze Airways
15 Jul - 22 Jul	Breeze Airways
18 Jul - 22 Jul	Breeze Airways
23 Jul - 25 Jul	Breeze Airways	direct
23 Jul - 26 Jul	Breeze Airways	direct
21 Jul - 24 Jul	Breeze Airways
31 Jul - 03 Aug	Breeze Airways
23 Jul - 24 Jul	Breeze Airways

Also check the deals for one-way flights from Islip to Charleston in July.

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 Islip to Charleston in July from $123

Return flights