The calculated distance (air line) between Chhāgalnāiya and Sonāmura is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Sonāmura is certainly longer, as only the direct route (as the crow flies) between Chhāgalnāiya and Sonāmura has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles