The calculated distance (air line) between Wexford and An Muileann gCearr is approximately 90 miles respectively 145 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 Wexford and An Muileann gCearr has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles