The calculated distance (air line) between Al ‘Amārah and Nāḩiyat al Fuhūd is approximately 65 miles respectively 104 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 Al ‘Amārah and Nāḩiyat al Fuhūd has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles