The calculated distance (air line) between Az̧ Z̧āhirīyah and Bethlehem is approximately 25 miles respectively 39 kilometers.
By car or train, the actual journey to Bethlehem is certainly longer, as only the direct route (as the crow flies) between Az̧ Z̧āhirīyah and Bethlehem has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles