The calculated distance (air line) between Nāḩiyat al Fuhūd and Nasiriyah is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to Nasiriyah is certainly longer, as only the direct route (as the crow flies) between Nāḩiyat al Fuhūd and Nasiriyah has been calculated here.
Air line (approximately)
45 kilometers
25 nautical miles