From PARIS to ISTANBUL by train.
How to buy point to point train tickets - online shop. Interrail and Eurail pass travel information. Route from Paris (France) to Istanbul (Turkey).
Train connection from Paris to Istanbul. The journey will take several days, but is easy to do with only some changes.
Paris - Istanbul: https://en.rail.cc/train-connection/par ... turkey/298
Istanbul - Paris: https://en.rail.cc/train-connection/ist ... france/299
Update: Jan 2015