The calculated distance (air line) between Xewkija and Birżebbuġa is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Birżebbuġa is certainly longer, as only the direct route (as the crow flies) between Xewkija and Birżebbuġa has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles