It is very easy to take the train from
Termini to the port. Cheap too. Under five euros per person. But bear in mind that there is no elevator when you get the the train station Civitevvicha. You can definitely break your back first going down the stairs and then up the stairs with heavy luggage. So keep that in mind. Then, you really cannot walk to the pier unless you are superman or superwoman. The pier is a good 1/2 hour walk. Cab will cost you $20 euros if they take you. A lot of time they are simply lazy and will say no. We would definitely not do it again. We would prefer to pay for the luxury of a bus transfer from the airport. Why start your trip with a sore back. Cheers.