The journey from Munnar to Patna covers 2400 km. You must first reach Ernakulam by road. From Ernakulam Junction, trains like the Patna Express connect to Patna Junction. The train journey takes about 48-52 hours. Alternatively, fly from Kochi to Patna with a layover in Delhi or Kolkata.
Total Distance: Driving distance 2450 km, Air distance 2000 km.
Direct trains are available; check the IRCTC website.
Connecting flights are the fastest way to reach Patna.
October to March for pleasant weather.