The calculated distance (air line) between Bou Hadjar and Houmt Souk is approximately 125 miles respectively 201 kilometers.
By car or train, the actual journey to Houmt Souk is certainly longer, as only the direct route (as the crow flies) between Bou Hadjar and Houmt Souk has been calculated here.
Air line (approximately)
201 kilometers
108 nautical miles