The calculated distance (air line) between Carrigaline and Droichead Nua is approximately 116 miles respectively 187 kilometers.
By car or train, the actual journey to Droichead Nua is certainly longer, as only the direct route (as the crow flies) between Carrigaline and Droichead Nua has been calculated here.
Air line (approximately)
187 kilometers
101 nautical miles