The calculated distance (air line) between Loughrea and Dún Laoghaire is approximately 101 miles respectively 162 kilometers.
By car or train, the actual journey to Dún Laoghaire is certainly longer, as only the direct route (as the crow flies) between Loughrea and Dún Laoghaire has been calculated here.
Air line (approximately)
162 kilometers
87 nautical miles