The calculated distance (air line) between Najaf and Nāḩiyat al Fuhūd is approximately 158 miles respectively 254 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 Najaf and Nāḩiyat al Fuhūd has been calculated here.
Air line (approximately)
254 kilometers
137 nautical miles