The journey from Munnar to Kolkata covers 2100 km. You must first reach Ernakulam by road. From Ernakulam Junction, the Coromandel Express or other long-distance trains connect to Howrah/Kolkata. The train journey takes about 40-45 hours. Alternatively, fly from Kochi to Kolkata with a layover in Chennai or Hyderabad.
Total Distance: Driving distance 2150 km, Air distance 1750 km.
Direct trains are available; check the IRCTC website.
Connecting flights are the fastest way to reach Kolkata.
October to March for pleasant weather.