The calculated distance (air line) between Haz-Zebbug and San Lawrenz is approximately 18 miles respectively 30 kilometers.
By car or train, the actual journey to San Lawrenz is certainly longer, as only the direct route (as the crow flies) between Haz-Zebbug and San Lawrenz has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles