Samjhauta Express runs only between Attari (India) and Wagah (Pakistan) - a mere 3 km. run on Monday and Thursday.
the 14001-Delhi-Attari Express is the "Indian leg of the Samjhauta Express". It is actually a separate train and its main purpose is to connect with the Samjhauta Express. It will take you from Delhi to Attari in 8 hours, after which you will have to do some immigration clearance before transferring to the Samjhauta Express.
It starts from delhi on Sunday and Wednesday - reaching attari on monday and thursday...
more... for the connection with Samjhauta Express.
for more informative details about the train ..check the link..
click here