The calculated distance (air line) between Maralal and Ongata Rongai is approximately 172 miles respectively 277 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Maralal and Ongata Rongai has been calculated here.
Air line (approximately)
277 kilometers
150 nautical miles