The journey from Cherthala to Patna is a very long-distance rail trip connecting the southern coast of Kerala to the northern state of Bihar. You will need to take a train from Cherthala or Ernakulam to a major hub like Chennai or Kolkata, and then a connecting train to Patna Junction. The journey takes about 45 to 50 hours, so be prepared for a long and tiring trip.
Total Distance: Driving distance 2600 km, Air distance 2100 km.
Book your tickets well in advance as this is a very long route.
October to March for pleasant weather.