The calculated distance (air line) between Bnei Brak and Modiin Ilit is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Modiin Ilit is certainly longer, as only the direct route (as the crow flies) between Bnei Brak and Modiin Ilit has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles