The calculated distance (air line) between Ksar Hellal and Houmt El Souk is approximately 122 miles respectively 197 kilometers.
By car or train, the actual journey to Houmt El Souk is certainly longer, as only the direct route (as the crow flies) between Ksar Hellal and Houmt El Souk has been calculated here.
Air line (approximately)
197 kilometers
106 nautical miles