The calculated distance (air line) between Cill Airne and An Muileann gCearr is approximately 136 miles respectively 219 kilometers.
By car or train, the actual journey to An Muileann gCearr is certainly longer, as only the direct route (as the crow flies) between Cill Airne and An Muileann gCearr has been calculated here.
Air line (approximately)
219 kilometers
118 nautical miles