Tambaram–Nagercoil Antyodaya Express
The 20691 / 20692 Tambaram–Nagercoil Antyodaya Express (via Kumbakonam, Thanjavur Jn, Tiruchchirappalli Jn, Madurai Jn) is an express train of the Indian Railways connecting Chennai  and  in Tamil Nadu. It is operated daily from Chennai Tambaram to Nagercoil Junction as train number 20691, and from Nagercoil Junction to Chennai Tambaram as train number 20692. Announced in 2017, the train started its operations on 9 June 2018 from Tirunelveli Junction and on 10 June 2018 from Tambaram. This train was previously running only up to  but recently this train has been extended up to  by Indian Railways. Coach composition

Schedule

Service

20691/Tambaram–Nagercoil Antyodaya Express has an average speed of 59 km/h and covers 764 km in 13 hrs 50 mins. 20692/Nagercoil–Tambaram Antyodaya Express has an average speed of 55 km/h and covers 764 km in 14 hrs 00 mins. 