Nothing regular. There are some flights from La Isabela airport...have to go there and check them out...might be good to post what you find here..
HB
Try wikipedia to find out which airlines run which routes out of which airports.
La Isabela International Airport - Wikipedia, the free encyclopedia
Then look at the bottom of the page. All the airports, and the pages contain the airlines and routes.
There are domestic carriers, the main ones from La Isabella run to Punta Cana/Samana. SAP run Puerto Plata, but as I understand it they are mainly moving airline personnel to another flight, they're not really a scheduled flight.
Hardly cutting edge, but provides for the wealthy to fly down to Bavaro on the weekend....