Schedules:

• train (LIRR)
• bus
• ferries:
  • Bridgeport-Port Jeff.
  • New London-Orient Point

AirTrain:

• JFK
• Newark

Limos:

• Spartan Limousine Service (631-928-5454)
• Lindy's (631-265-2500)
• Winston Limousine Service (631-924-1200; outside NY toll-free 1-888-444-4425)
• Classic (631-567-5100)
• Travellers Transport (631-751-6633)

Note that Long Island MacArthur (Islip) Airport is much closer, and often much cheaper (in terms of ground connections), than New York City airports.