The calculated distance (air line) between Baniachang and Nārāyanganj is approximately 83 miles respectively 133 kilometers.
By car or train, the actual journey to Nārāyanganj is certainly longer, as only the direct route (as the crow flies) between Baniachang and Nārāyanganj has been calculated here.
Air line (approximately)
133 kilometers
72 nautical miles