The distance from the port a Piraeus is about 165 miles, though you can reach Chios by air in less than 40 minutes.
The island has an area of about 840 sq. kilometers, and it is the fifth largest island in Greece, after Crete, Evoia, Rhodes, and Lesvos. The length of the coastline is more than 200 kms. The Prefecture of Chios (905 sq. kms) includes also two smaller inhabited islands, Psara and Innousses.
Chios can be reached either by sea or by air. The main connections are with Athens and Piraeus, and the islands of Samos and Lesvos. There are also regular connections with some other major Greek cities, including Salonika, Kavala, Alexandroupolis, and the islands of Kos, Rhodes, Patmos, Lemnos etc. Most connections are served by both sea and air.