Looking at the first chart herein, one can see that among U.S. states Florida exports the most to Cuba in the most recent year (2015), albeit with less margin versus number two ranked Georgia that one might guess. Florida’s near $35 million in exports, presumably much of which originates from Miami, represents 18.8% of a total of $180 million in exports by the USA as a whole.
There are a number of interesting charts in the full post by the Americas Center of the Federal Reserve Bank of Atlanta, such as this second one breaking down the product and commodity mix of exports to Cuba. View all the charts and read their full post here.