The journey from Kulamavu to Patna covers about 2600 km. The most practical way is to take a bus to Ernakulam and then a train to Patna. The train journey takes about 45 to 50 hours. This is a very long journey, so plan accordingly.
Total Distance: Driving distance is 2600 km; straight-line air distance is 2000 km.
Book your train tickets well in advance.
October to March is the best time to visit Patna.