Kolkata is located 1900 km from Dombivli. The most efficient way to reach is via the Howrah-Mumbai main line from Kalyan Junction. The drive via NH 16 is very long and requires multiple days. Kolkata is the cultural capital of India.
Total Distance: 1900 km by road, 1650 km air distance.
Long-distance trains are the best option.
October to March for pleasant weather.