| Aronai Express | |
| Type: | Superfast Express |
| First: | (Initial run) (extended to)[1] (extended to)[2] |
| Operator: | Northeast Frontier Railway |
| Stops: | 56 |
| Distance: | 3915km (2,433miles) |
| Journey Time: | 74 hrs 5min. |
| Frequency: | Weekly |
| Class: | AC 2 tier, AC 3 tier, Sleeper Class, General Unreserved |
| Seating: | Corridor coach |
| Sleeping: | Couchette car |
| Autorack: | No |
| Catering: | Yes |
| Observation: | Large windows |
| Baggage: | Available |
| Stock: | LHB coach |
| Electrification: | Partial |
| Trainnumber: | 12507 / 12508 |
| Speed: | 55km/h |
The 12507 / 12508 Aronai Express is a Superfast Express train belonging to Indian Railways. It is operated by Northeast Frontier Railway zone that runs between in Kerala and in Assam. It is the 28th longest train service in the world. Initially, Thiruvananthapuram–Silchar Aronai Superfast Express ran between and . On 21 November 2017, it was extended to Silchar.[3] After this extension, it is now the second longest running train in India.
The express train service was started on 14 April 1987. It operates as train number 12507 from Thiruvananthapuram Central to Silchar and as train number 12508 in the reverse direction serving the 8 states of Assam, West Bengal, Bihar, Jharkhand, Odisha, Andhra Pradesh, Tamil Nadu and Kerala.[4] [5]
The 12508 – Aronai Express covers a distance of 3915km (2,433miles), with a total travel time of 74 hours and 44 minutes, travelling at a speed of 52.60 km/h.