The calculated distance (air line) between Nāḩiyat al Fuhūd and As Sālimīyah is approximately 139 miles respectively 224 kilometers.
By car or train, the actual journey to As Sālimīyah is certainly longer, as only the direct route (as the crow flies) between Nāḩiyat al Fuhūd and As Sālimīyah has been calculated here.
Air line (approximately)
224 kilometers
121 nautical miles