The calculated distance (air line) between Garba Tula and Ongata Rongai is approximately 180 miles respectively 290 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Garba Tula and Ongata Rongai has been calculated here.
Air line (approximately)
290 kilometers
156 nautical miles