Southwest has announced that they will fly nonstop from Houston to Aruba, starting March 7, 2015, on Saturdays (only).  This is earlier than previously announced because Aruba has pre-clearance of passengers by U.S. border patrol.  Thus the incoming passengers can come into the domestic terminal.  SW is building a new terminal in Houston which is expected to handle international flights from several destinations.  The new terminal is expected to be finished by the end of next year.