The calculated distance (air line) between Kapsabet and Ongata Rongai is approximately 159 miles respectively 256 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Kapsabet and Ongata Rongai has been calculated here.
Air line (approximately)
256 kilometers
138 nautical miles