The calculated distance (air line) between Ambohitrolomahitsy and Antananarivo is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to Antananarivo is certainly longer, as only the direct route (as the crow flies) between Ambohitrolomahitsy and Antananarivo has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles