The calculated distance (air line) between Debre Sīna and Addis Ababa is approximately 89 miles respectively 144 kilometers.
By car or train, the actual journey to Addis Ababa is certainly longer, as only the direct route (as the crow flies) between Debre Sīna and Addis Ababa has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles