The calculated distance (air line) between Rosh Ha‘Ayin and Ramat HaSharon is approximately 8 miles respectively 12 kilometers.
By car or train, the actual journey to Ramat HaSharon is certainly longer, as only the direct route (as the crow flies) between Rosh Ha‘Ayin and Ramat HaSharon has been calculated here.
Air line (approximately)
12 kilometers
7 nautical miles