From SOFIA to ISTANBUL by train.
How to buy point to point train tickets - online shop. Interrail and Eurail pass travel information. Route from Sofia (Bulgaria) to Istanbul (Turkey).[/size]
Train connection from Sofia to Istanbul.
Sofia - Istanbul: https://en.rail.cc/train-connection/sof ... turkey/295
Istanbul - Sofia: https://en.rail.cc/train-connection/ist ... lgaria/297
Update: Jan 2015