yes, let me know how you do that leaving from north america.
The train connections are London England, Paris France, Bologna Italy,
Bari Italy, Patras Greece and Athens Greece (see
http://www.seat61.com/Greece.htm )
I found direct flights for each except on expedia from ether JFK or EWR
in New York except for GPA-Patras-Araxos
JFK <> London Heathrow LHR
JFK <> Paris (CDG or ORY) France
JFK <> Guglielmo Marconi, Bologna, Italy
JFK <> Bari (BRI), Italy
EWR <> Athens, Greece
**I only started looking into it today, so you have all the info I have