The journey from Kullu to Kolkata covers 1800 km. You must take a bus to Delhi and then a train to Kolkata. The train journey from Delhi to Kolkata takes about 17-20 hours via the Rajdhani Express. This route connects the Himalayas to the cultural capital of India. Expect a total travel time of 35-40 hours including transfers.
Total Distance: 1800 km by road, 1400 km air distance.
Rajdhani Express is the most comfortable train for this route.
October to March for pleasant weather in Kolkata.