If you decide to use a train then you have the following options.
Trains take a considerable (usually) amount of time to get to their destinations. If your starting point is Athens the details you need are:
By train you have to ask for a ticket to Patras-Kiato. The train travels the route Athens-Patras but the final stop is Kiato and then you are taken to Patras by bus.
Your starting station will be: “Stathmos Peloponnisou” which means Peloponnese station.
If you want more information please call (0030) 1110 or click the following link: More train information