The calculated distance (air line) between Uttar Char Fasson and Khagrachhari is approximately 101 miles respectively 162 kilometers.
By car or train, the actual journey to Khagrachhari is certainly longer, as only the direct route (as the crow flies) between Uttar Char Fasson and Khagrachhari has been calculated here.
Air line (approximately)
162 kilometers
87 nautical miles