The calculated distance (air line) between Bizerte and Medjez el Bab is approximately 46 miles respectively 73 kilometers.
By car or train, the actual journey to Medjez el Bab is certainly longer, as only the direct route (as the crow flies) between Bizerte and Medjez el Bab has been calculated here.
Air line (approximately)
73 kilometers
40 nautical miles