Buses leave from either the central bus station near the train station, or the more central stop on bd Clémenceau; many stop at both. There are three different companies, so for up-to-date timetables consult www.lepilote.com, www.edgard-transport.fr or www.envia.fr. Destinations include the following:
Aix-en-Provence Cartreize Line 18, €11, 1¼ hours, up to nine per day from Arles-Clémenceau
Salon-de-Provence Cartreize Line 29, €4.80, 1¼ hours, up to six per day from the central bus station
Stes-Marie-de-la-Mer Envia Line 20, €2.50, one hour, up to six per day from the central bus station Monday to Saturday
The train station has services to Nîmes (from €7.50, 30 minutes to one hour, hourly), Marseille (€13, one hour, at least hourly) and Avignon (€6, 20 minutes, every one to two hours). The closest TGV stations are in Avignon and Nîmes.