The calculated distance (air line) between Carrick-on-Suir and Greystones is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Greystones is certainly longer, as only the direct route (as the crow flies) between Carrick-on-Suir and Greystones has been calculated here.
Air line (approximately)
127 kilometers
68 nautical miles