The calculated distance (air line) between Eldoret and Ongata Rongai is approximately 168 miles respectively 270 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Eldoret and Ongata Rongai has been calculated here.
Air line (approximately)
270 kilometers
146 nautical miles