The calculated distance (air line) between Wad Medani and As Sūkī is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to As Sūkī is certainly longer, as only the direct route (as the crow flies) between Wad Medani and As Sūkī has been calculated here.
Air line (approximately)
127 kilometers
68 nautical miles