The calculated distance (air line) between Yoqne‘am ‘Illit and Modiin Ilit is approximately 50 miles respectively 80 kilometers.
By car or train, the actual journey to Modiin Ilit is certainly longer, as only the direct route (as the crow flies) between Yoqne‘am ‘Illit and Modiin Ilit has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles