KISP is the ICAO code for Long Island Mac Arthur Airport (IATA ISP), located in Islip, NY.
Long Island MacArthur Airport, formerly known as Islip Airport, is a public airport located in Ronkonkoma, New York, within the Town of Islip in Suffolk County, on Long Island. Covering 1,311 acres (531 ha), the airport was established in 1942, activated in 1943, and began operating as a commercial airport in 1960. It has three runways and two helipads.
Excerpted from Wikipedia, available under the Creative Commons Attribution-ShareAlike License.