The journey from Chhatna to Kalimpong covers about 600 km. The most practical way is to take a train to New Jalpaiguri and then a taxi to Kalimpong. Driving is also an option via NH 12. Expect a total travel time of 16 to 18 hours by train.
Total Distance: 600 km by road, 500 km straight-line air distance.
Book your train from Kolkata to New Jalpaiguri well in advance.
October to March for pleasant weather.