The calculated distance (air line) between Bat H̱efer and Rosh Ha‘Ayin is approximately 17 miles respectively 27 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 Bat H̱efer and Rosh Ha‘Ayin has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles