The calculated distance (air line) between Sallins and An Muileann gCearr is approximately 34 miles respectively 54 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 Sallins and An Muileann gCearr has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles