| Box Width: | 27em |
| Color: | 00ced1 |
| Nellai Express | |
| Type: | Superfast |
| Status: | Active |
| Locale: | Tamil Nadu |
| Operator: | Southern Railway zone |
| Start: | (MS) |
| Stops: | 12 |
| End: | (TEN) |
| Distance: | 650km (400miles) |
| Journeytime: | 10 hours, 40 minutes |
| Frequency: | Daily |
| Trainnumber: |
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| Line Used: |
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| Class: |
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| Seating: | Yes |
| Sleeping: | Yes |
| Autorack: | No |
| Catering: | On-board catering E-catering |
| Observation: | Large windows in all carriages |
| Entertainment: | No |
| Baggage: | Overhead racks |
| Otherfacilities: | CCTV Cameras in all coaches |
| Stock: | WAP-7 locomotive from (RPM) Electric Loco Shed, Royapuram |
| El: | 25 kV AC, 50 Hz |
| Trainlength: | 22 coaches |
| Owners: | Southern Railway zone |
| Routenumber: | 21/21A |
| Sharing: | Pothigai Superfast Express |
Nellai Express is a Superfast train operated by the Southern Railway zone of the Indian Railways. It runs on all days connecting with via Villupuram Junction, Tiruchirappalli Junction and Madurai Junction through the chord line.
The town is also called 'Nellai' after the Nellaiyappar temple in Tirunelveli. Hence, this train from Nellai is named Nellai Express
The service has all class of coaches in Indian railways like 1 AC First cum Second AC Coach, 2 AC Two-tier coaches, 6 AC Three-tier coaches, 8 Sleeper Coaches,3 Unreserved and 2 luggage, brake cum generator van. It runs with LHB (Linke Hoffman Busch) coaches and is maintained at Tirunelveli Junction.