The calculated distance (air line) between Sandwīp and Chhāgalnāiya is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Chhāgalnāiya is certainly longer, as only the direct route (as the crow flies) between Sandwīp and Chhāgalnāiya has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles