Find Your Cruise
Either hire a private van transfer which will be around €200. Or take the Leonardo Exprress train fronm the airport to Roma Termini for €13pp and then take the train to Civitavecchia for €9pp. At Civitavecchia walk 10 mins along the shore front to the port walls and there you will find the free shuttle bus that takes you to the ship.
Thank you very much for your replies, it is very useful.