The calculated distance (air line) between Sidi Bou Ali and Houmt El Souk is approximately 145 miles respectively 234 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 Sidi Bou Ali and Houmt El Souk has been calculated here.
Air line (approximately)
234 kilometers
126 nautical miles