A very common and preferably old beach destination in West Bengal is Digha. This place is well connected from Kolkata, as I live in Kolkata. Anyone can avail bus from salt lake or Esplanade. And avail train from Howrah station. This beach destination is located in West Midnapore district of West Bengal. I went to Digha with my friends. I booked train ticket through irctc app, and hotel in new digha. There are 3 trains available to go digha from howrah. First one is in the morning almost 6:30 am, 2nd one is super first which departs around 11am and the last one is almost at 3 pm.
We booked ticket for howrah digha super fast train. It provides lunch on the way. This train took almost 3 hours and 30 minutes to reach digha.