Airport to ferry port in 50 minutes, without changing trains! Although the Athens Metro (subway) has connected the two since the 2004 Olympics the trip involved a transfer in central Athens that was difficult to manage with luggage. The Express busses were still the best option. In another two months that will be changing.
The Proastiakos or suburban railway has already had its test run carrying the Transport Minister and members of the press. Although the route looks very round about on a map the trains are capable of 160 km per hour (100 mph) .
The train also connects to other popular destinations out of Athens such as the Corinth canal and the historical capital of Naplion on the Peloponese.
I am really impressed with the continual improvements to transportation in and around Athens. If they would only do something about the parked cars blocking the sidewalks!