It runs between Lokmanya Tilak Terminus in Mumbai, Maharashtra and Patliputra Junction in Patna, Bihar.

On 1 January 2016, service from Patna side was shifted from Rajendra Nagar Terminal to Patliputra Junction, which is the current iteration of this train.

12141 service starts from Lokmanya Tilak Terminus at 11:35 PM and arrives Patliputra Junction railway station at 03:50 AM on the third day.

12142 service starts from Patliputra Junction at 11:05 AM and arrives Lokmanya Tilak Terminus at 02:10 PM on the next day.

A head on generation equipped WAP-7 locomotive from Kalyan Electric Loco Shed hauls the service from Lokmanya Tilak Terminus to Patliputra Junction.