The calculated distance (air line) between Mazkeret Batya and Rosh Ha‘Ayin is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Rosh Ha‘Ayin is certainly longer, as only the direct route (as the crow flies) between Mazkeret Batya and Rosh Ha‘Ayin has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles