Cheapest return flights from Islip to Charleston in September from $78

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

Return flights

05 Sep - 10 Sep Breeze Airways direct
03 Sep - 01 Oct Breeze Airways direct
17 Sep - 22 Sep Breeze Airways direct
15 Sep - 22 Sep Breeze Airways direct
19 Sep - 22 Sep Breeze Airways direct
03 Sep - 07 Sep Breeze Airways
12 Sep - 14 Sep Breeze Airways
18 Sep - 21 Sep Breeze Airways
11 Sep - 14 Sep Breeze Airways
16 Sep - 22 Sep Cape Air

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

Skyscanner

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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