The calculated distance (air line) between Ballincollig and Droichead Nua is approximately 117 miles respectively 188 kilometers.
By car or train, the actual journey to Droichead Nua is certainly longer, as only the direct route (as the crow flies) between Ballincollig and Droichead Nua has been calculated here.
Air line (approximately)
188 kilometers
102 nautical miles