The calculated distance (air line) between An Nāşirīyah and Sohag is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Sohag is certainly longer, as only the direct route (as the crow flies) between An Nāşirīyah and Sohag has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles