The calculated distance (air line) between Port el Kantaoui and Houmt El Souk is approximately 140 miles respectively 226 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 Port el Kantaoui and Houmt El Souk has been calculated here.
Air line (approximately)
226 kilometers
122 nautical miles