By foot from Piraeus to Piraeus (city)
From cruise terminal A and B you can easily reach the center and the rest of the Piraeus port on foot. Walk to Miaoulis Avenue. There you are close to the ferry port and the town center. And you can also find public transport to Athens.
When you leave cruise terminal A, it may seem rather difficult to walk to the city center. There is a tunnel, a parking lot with buses and taxis and a viaduct to the roof of the terminal. Just stay on the left side under the covered parking lot. Just past the gate of the port you will see another large outdoor parking (not always in use) on your left side. Cross it and you arrive at Miaoulis Avenue.