Nagaon Express [1](earlier Tambaram–Silghat Town Express), is a weekly Express train belonging to Northeast Frontier Railway zone of Indian Railways that connects Silghat Town of Assam and Tambaram in the South Indian metropolis of Chennai, Tamil Nadu.

The train leaves Tambaram (TBM) on every Monday at 9:45 P.M. and arrives Silghat Town (SHTT) on Thursday at 9:45 A.M. traversing a distance of 2965 kilometers in 60 hours.

The train leaves Silghat Town (SHTT) on every Friday at 8:30 A.M. and arrives Tambaram (TBM) on Sunday at 20:50 P.M. traversing a distance of 2965 kilometres in 60 hours & 20 minutes.

The train is hauled by WAP-7 Locomotive of Electric Loco Shed, Erode from Tambaram to Visakhapatnam.

Finally from Durgapur to Silghat Town the train is hauled by WAP-4 Locomotive of Electric Loco Shed, Howrah and vice versa.