The calculated distance (air line) between Sayhāt and Dār Kulayb is approximately 40 miles respectively 65 kilometers.
By car or train, the actual journey to Dār Kulayb is certainly longer, as only the direct route (as the crow flies) between Sayhāt and Dār Kulayb has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles