All big cities are connected through a network of buses with set timetables known as KTEL(Here’s the official site for all KTEL bus lines). They fall in line with all modern requirements and specifications, ensuring a safe, quick and enjoyable trip through the biggest cities of this beautiful country.
If you have an inquiry about the bus network 14 505 is the phone number to call. By calling you can find out all sorts of information about the itinerary of buses, scheduled routes and costs. It is advisable that you call after arriving in Greece. Landline and mobile phones will get you through.
In addition, if you just arrived in Athens by plane and are looking for buses, you can also call 2105124910 which is the landline phone number for Attica bus station information.