The calculated distance (air line) between Kibre Mengist and Arba Minch is approximately 99 miles respectively 159 kilometers.
By car or train, the actual journey to Arba Minch is certainly longer, as only the direct route (as the crow flies) between Kibre Mengist and Arba Minch has been calculated here.
Air line (approximately)
159 kilometers
86 nautical miles