The calculated distance (air line) between Kfar Saba and Modi‘in Makkabbim Re‘ut is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Modi‘in Makkabbim Re‘ut is certainly longer, as only the direct route (as the crow flies) between Kfar Saba and Modi‘in Makkabbim Re‘ut has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles