There's a dispatch office at the airport; you can also flag down taxis on the street (look for license plates with a "TX" tag). Alternatively, ask at the front desk of any resort to call you a cab. Rates are fixed (i.e., there are no meters; the rates are set by the government and displayed on a chart), though you and the driver should agree on the fare before your ride begins. Add $2 to the fare after midnight and $3 on Sunday and holidays. An hour-long island tour should cost about $45 with up to four people, but agree on a fare before heading out.
Arubas Transfer Tour & Taxi C.A. . Airport, 297/582–2116 ; 297/582–2010; www.airportaruba.com.