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