The journey from Nakur to Kochi is a massive 2600 km trip. You must reach Saharanpur Junction to catch a train to Kochi. The route takes you across the entire length of India. Road travel is not practical. Kochi is a major port city in Kerala.
Total Distance: 2600 km by road, 2100 km air distance.
This is a very long journey, prepare for multiple days on the train.
October to March.