Bus Service in Arquillos
There are various bus services from Arquillos to Jaén, Bailén, Castellar, Chiclana de Segura, Linares, Mengíbar, Navas de San Juan, Santisteban del Puerto, Sorihuela de Guadalimar and Vadollano using the company, Empresa Castillo.
http://www.empresacastillo.com/index.php
The bus station in Arquillos is on Avenida de Vilches.