It is advisable to leave for the plateau early to reach the site before noon. Because of the altitude, the plateau is often covered in mist by early afternoon.
By public transport, you can take a bus from Yogya to Magelang and change for Wonosobo. From Wonosobo, take a minibus to the village of Dieng. The sites on the plateau can be reached on foot from the village of Dieng. If you are driving, parking is available near the main sites.