The calculated distance (air line) between Glanmire and Droichead Nua is approximately 110 miles respectively 178 kilometers.
By car or train, the actual journey to Droichead Nua is certainly longer, as only the direct route (as the crow flies) between Glanmire and Droichead Nua has been calculated here.
Air line (approximately)
178 kilometers
96 nautical miles