The calculated distance (air line) between Er Regueb and Houmt El Souk is approximately 91 miles respectively 147 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 Er Regueb and Houmt El Souk has been calculated here.
Air line (approximately)
147 kilometers
79 nautical miles