Does Southwest fly into JFK or LaGuardia (LGA)?

Does Southwest fly into JFK or LaGuardia (LGA)? Southwest Airlines does not operate flights into New York City's LaGuardia (LGA) or JFK airports. Alternatively Southwest offers handy options for travellers visiting the New York metropolitan area with flights to and from the neighbouring Long Island MacArthur Airport (ISP) and Newark Liberty International Airport (EWR).