The calculated distance (air line) between Cox’s Bāzār and Nārāyanganj is approximately 178 miles respectively 287 kilometers.
By car or train, the actual journey to Nārāyanganj is certainly longer, as only the direct route (as the crow flies) between Cox’s Bāzār and Nārāyanganj has been calculated here.
Air line (approximately)
287 kilometers
155 nautical miles