The journey from Thiruthuraipoondi to Patna covers about 2400 km. You should travel to Chennai to catch a direct train to Patna Junction. The journey takes approximately 45 to 50 hours. Patna is one of the oldest continuously inhabited places in the world.
Total Distance: Driving distance 2450 km, straight-line air distance 1900 km.
This is a very long journey; carry enough food and water.
October to March, when the weather is cool and pleasant.