The area of the expo is comprised of 110 hectares and is built in the style of a Roman city. The Exposition Site of Expo Milano 2015 is a few kilometers from the center of Milan, in an area directly connected by three main city airports and by principal public transport lines. The Site is easily accessible by international and local travelers alike through a highly connected transportation system.
For more information visit:
http://www.expo2015.org/en/explore/exhibition-site/how-to-reach-the-expo-site