The journey from Nakur to Thiruvananthapuram is a massive 2800 km trip. You must reach Saharanpur Junction to catch a train to Thiruvananthapuram. The route takes you across the entire length of India. Road travel is not practical. Thiruvananthapuram is the capital of Kerala.
Total Distance: 2800 km by road, 2300 km air distance.
This is a very long journey, prepare for multiple days on the train.
October to March.