The calculated distance (air line) between Mevasseret Tsiyyon and Rosh Ha‘Ayin is approximately 23 miles respectively 37 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 Mevasseret Tsiyyon and Rosh Ha‘Ayin has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles