The calculated distance (air line) between Dhamār and Dhī as Sufāl is approximately 53 miles respectively 85 kilometers.
By car or train, the actual journey to Dhī as Sufāl is certainly longer, as only the direct route (as the crow flies) between Dhamār and Dhī as Sufāl has been calculated here.
Air line (approximately)
85 kilometers
46 nautical miles