There are no trains on Aruba.
Car and bus
The airport is situated southeast of Oranjestad, Aruba's capital. The airport is easily accessible by rental car, as it lies directly off the island's main road.
There's a bus station nearby the terminal. Arubus (Tel. +297 5827 089) has several services connecting the airport with other places on Aruba.
Car rental Aruba Airport
Opposite the Arrivals Hall there's a row of offices of car rental companies. At Aruba Airport you can rent a car with no less than ten companies, including some local and international providers such as Avis, Budget, Hertz and National. You can also book a rental car in advance using the services provided by EasyTerra; they compare the rates of several providers in a single quote.
Taxis (Tel. +297 5875 900) can be found outside the Arrivals Hall. There are fixed rates to several destinations. Prices are clearly indicated on signs.
There's a parking lot outside the terminal. There are no separate short or long-term parking places. You pay 3 Aruban florins per hour. The day rate is 30 florins for the first two days, followed by 15 florins per day.