The calculated distance (air line) between Hassi Messaoud and Ghardaïa is approximately 151 miles respectively 243 kilometers.
By car or train, the actual journey to Ghardaïa is certainly longer, as only the direct route (as the crow flies) between Hassi Messaoud and Ghardaïa has been calculated here.
Air line (approximately)
243 kilometers
131 nautical miles