https://www.palmbeachpost.com/news/20200...xcluded-for-now

Something that hadn't occurred to me, that South Florida has a lot of residents and travelers from New York. Clearly the first outbreak cases in South Florida came from the Tri-county New York/New Jersey/Connecticut area, by airline passengers. The first was about 10 days ago (one of whom will be prosecuted for reckless endangerment, because he knew he has Covid-19 infection and still got on a plane to West Palm Beach). It was made clear early on that those who test positive and do not quarantine will be jailed. As of today there are about 100 Palm Beach County Covid-19 cases, out of a 1.5 million population.

To me the logical thing to do is shut down all flights to Palm Beach County and the rest of Florida out of the New York area, common sense. But as the above linked article makes clear, there are legal problems with implementing that.
More improtant to me is enforcement of quarantine/isolation of known cases, and testing their contacts to weed out clusters of potential spread.