Airline Travel to Florence, Italy
Galileo Galilei Airport
This airport is in Pisa and is the closest International airport to Florence, approximately 60 miles away. There are no direct flights to Pisa from the U.S., but connections can be made in most of the major European cities. From Pisa you can go to Florence by train, bus, rental car or by small commuter plane.
Amerigo Vespucci Airport
This is the small (non-international) airport in Florence. It is recently expanded and many European Airlines now have flights into Florence.

A parial list of International airlines that fly to Italy: Air France, Alitalia, British Airways, Delta Airlines and Lufthansa.
A partial list of airlines that fly into Florence's Amerigo Vespucci Airport: Air France, Alitalia, Meridiana, Sterling Blue.