The calculated distance (air line) between Deir Ḥannā and Kfar Saba is approximately 54 miles respectively 88 kilometers.
By car or train, the actual journey to Kfar Saba is certainly longer, as only the direct route (as the crow flies) between Deir Ḥannā and Kfar Saba has been calculated here.
Air line (approximately)
88 kilometers
47 nautical miles