The calculated distance (air line) between Hal Gharghur and Marsaxlokk is approximately 8 miles respectively 12 kilometers.
By car or train, the actual journey to Marsaxlokk is certainly longer, as only the direct route (as the crow flies) between Hal Gharghur and Marsaxlokk has been calculated here.
Air line (approximately)
12 kilometers
7 nautical miles