The calculated distance (air line) between Yehud-Monosson and Kfar Saba is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Kfar Saba is certainly longer, as only the direct route (as the crow flies) between Yehud-Monosson and Kfar Saba has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles