The calculated distance (air line) between Hammam Sousse and Houmt El Souk is approximately 138 miles respectively 222 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 Hammam Sousse and Houmt El Souk has been calculated here.
Air line (approximately)
222 kilometers
120 nautical miles