| Train | Source | Destination | Days Run from Chennai Egmore |
| 12631 - Nellai Sf Express | Chennai Egmore (MS) | Tirunelveli Jn (TEN) | Mon Tue Wed Fri Sat Sun |
| # | Station | Arrival | Departure | Halt | Distance | Day |
| 1 | Chennai Egmore (MS) | Source | 08:50 PM | 0 Mins | 0 KMs | 1 |
| 2 | Mambalam (MBM) | 09:03 PM | 09:05 PM | 2 Mins | 7 KMs | 1 |
| 3 | Tambaram (TBM) | 09:15 PM | 09:17 PM | 2 Mins | 25 KMs | 1 |
| 4 | Chengalpattu Jn. (CGL) | 09:43 PM | 09:45 PM | 2 Mins | 56 KMs | 1 |
| 5 | Melmaruvathur (MLMR) | 10:08 PM | 10:10 PM | 2 Mins | 91 KMs | 1 |
| 6 | Tindivanam (TMV) | 10:33 PM | 10:35 PM | 2 Mins | 121 KMs | 1 |
| 7 | Villupuram Jn (VM) | 11:28 PM | 11:30 PM | 2 Mins | 158 KMs | 1 |
| 8 | Vriddhachalam Jn (VRI) | 12:12 AM | 12:14 AM | 2 Mins | 213 KMs | 2 |
| 9 | Tiruchchirappalli Jn. (TPJ) | 02:05 AM | 02:10 AM | 5 Mins | 336 KMs | 2 |
| 10 | Dindigul Jn (DG) | 03:07 AM | 03:10 AM | 3 Mins | 429 KMs | 2 |
| 11 | Sholavandan (SDN) | 03:39 AM | 03:40 AM | 1 Mins | 475 KMs | 2 |
| 12 | Madurai Jn (MDU) | 04:00 AM | 04:05 AM | 5 Mins | 496 KMs | 2 |
| 13 | Virudunagar Jn (VPT) | 04:43 AM | 04:45 AM | 2 Mins | 539 KMs | 2 |
| 14 | Satur (SRT) | 05:03 AM | 05:05 AM | 2 Mins | 566 KMs | 2 |
| 15 | Kovilpatti (CVP) | 05:23 AM | 05:25 AM | 2 Mins | 588 KMs | 2 |
| 16 | Tirunelveli Jn (TEN) | 07:00 AM | Destination | 0 Mins | 653 KMs | 2 |