The calculated distance (air line) between Uttar Char Fasson and Sātkhira is approximately 110 miles respectively 177 kilometers.
By car or train, the actual journey to Sātkhira is certainly longer, as only the direct route (as the crow flies) between Uttar Char Fasson and Sātkhira has been calculated here.
Air line (approximately)
177 kilometers
95 nautical miles