The calculated distance (air line) between Ādīs Zemen and Mek'ele is approximately 149 miles respectively 239 kilometers.
By car or train, the actual journey to Mek'ele is certainly longer, as only the direct route (as the crow flies) between Ādīs Zemen and Mek'ele has been calculated here.
Air line (approximately)
239 kilometers
129 nautical miles