In the DR, buses do not go to the airports. They are controlled by the taxi driver's union, and the government has never been able to get past this, even though it is so clearly in the best interest of both Dominicans and tourists to be able to take a bus directly from the airport to their destination. You have to take a taxi from the airport to a bus station. Metro and Caribe tours do not operate in that part of the country. The biggest carrier is Bavaro Express. From La Romana airport to Boca Chica is about an hour and 15 minute drive.