Huntington is ~1 hour from New York City by car or train (Huntington stop on the Long Island Rail Road for the Hampton Inn, if staying at the Four Points you are able to get off at Cold Spring Harbor or Syosset 1-2 stops before Huntington on the same line, respectively, for a slightly shorter drive to hotel).
If flying to New York, we recommend flying in to LaGuardia or JFK airports (Newark Airport is on the other side of NYC and is a longer drive). From JFK it is possible to take an air train to the LIRR. From LaGuardia, we recommend ubering or renting a car to get to Huntington.
There are also direct flights to more local airport Macarthur Airport (ISP) from select cities (Fort Lauderdale, West Palm Beach, Orlando, Tampa, Baltimore, Philadelphia).