Buying 9 people trian tickets in Itlay

Unfortunately it is 5 and 4. Not sure you can buy FCO to Rome on the internet and there is no point in doing so. From Rome to Florence you may want to wait until you arrive in Italy since arrival and immigration can be a huge variable and hard to predict. If you buy discount tickets on line and miss the train, the ticket is toast. So it may not pay to purchases that ticket in advance. However, if you know your schedule then the tickets to Venice and back can be booked and maybe at a deep discount.

Lori, if you wait until you arrive at FCO, make your way to the airport train station in front of Terminal 3. You will be able to buy all 9 sets of tickets from the agent. He will make all reservations and seat assignments. You will pay full price (45Euro) on the trip from Rome to Florence. You can purchase in advance online and take advantage of lower fares. Frank also points out that you will have to purchase tickets online in groups of 5 and 4. Just make sure your train to Florence from Rome departs about 2.5hrs after your scheduled plane arrival. If you plane is late, your non-refundable tickets could be at risk. From the FCO airport to Rome-Termini, the fare is 14Euro. With 9 people, that's 126Euro. You might line up a mini-bus service at the airport to take you to Rome-Termini. I don't know the fares but it might be less than the Leonardo Express. As for you trips from Florence to Venice and Venice back to Rome, you are quite safe in buying in advance and locking in the train and the nicely discounted fares. You will have to plan quite carefully so that the train departures are carefully integrated into your travel plans. The discounted train fares begin at 19Euro and 29Euro respectively. Regular fares are 45Euro and 80Euro respectively.