The calculated distance (air line) between Barishal and Uttar Char Fasson is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Uttar Char Fasson is certainly longer, as only the direct route (as the crow flies) between Barishal and Uttar Char Fasson has been calculated here.
Air line (approximately)
64 kilometers
34 nautical miles