The calculated distance (air line) between Uttar Char Fasson and Sonārgaon is approximately 99 miles respectively 159 kilometers.
By car or train, the actual journey to Sonārgaon is certainly longer, as only the direct route (as the crow flies) between Uttar Char Fasson and Sonārgaon has been calculated here.
Air line (approximately)
159 kilometers
86 nautical miles