Buses run hourly trips between the beach resorts & hotels and Oranjestad (totaling 13 lines), and are operated by Arubus N.V. – the major public transportation service on the island (https://arubus.com).. One-way fare is US$2.30, and exact change is preferred (if you are paying in U.S. currency, you should keep some U.S. change handy). Arubus’ main office is located a few blocks away from Queen Beatrix Airport.
There are also minibuses that will pick you up at the same stops for the same price; just be sure to look for the “ATA approved” sign. Buses also go up and down the coast between Oranjestad and San Nicolas for the same fare.
NOTE ON SEA TRANSPORTATION: despite Aruba’s proximity to the Venezuelan coast and fellow Dutch possession Curaçao, there is no ferry service that operates to and from Aruba and these locations. Travelers interested in visiting these destinations must do so via air (unless one is able to hire a privately-owned boat). Also, Aruba has no railways, so taxis, buses and privately-rented cars are the only means of transportation within the island.