The route from Bettiah to Kolkata spans roughly 650 km. You can take a train from Bettiah to Muzaffarpur or Hajipur and then catch a connecting train to Kolkata. Alternatively, buses run to Patna, from where you can take a long-distance bus or train to Kolkata. The journey takes you through the lush landscapes of North Bihar and the industrial belts of West Bengal.
Total Distance: 650 km by road, 580 km air distance.
Change trains at Barauni or Hajipur for better connectivity to Howrah or Sealdah.
November to February to avoid the humid summer and monsoon rains.