Rome has two airports - Leonardo da Vinci (at Fiumicino) and Ciampino. The former is used by the major carriers while the latter has become a hub for the budget airlines Ryanair and EasyJet.
Leonardo da Vinci airport lies near the sea, 32km from the city. The most direct way to get into Rome is by train on the Leonardo Express to the Stazione Termini (Rome's main train station). Services run every 30 minutes throughout the day with one-way tickets costing €11. Coach transfers are also available costing around €12 return. Taxis are more expensive, at €40 between the airport and city centre.
Like many airports served by the budget airlines Ciampino's facilities are basic but functionary. The easiest way to get into Rome is by coach transfer, but full transport options can be found at http://www.italyheaven.co.uk/rome/ciampino.html.
Rome has an extensive Metro system.