The calculated distance (air line) between Esch-sur-Alzette and Grevenmacher is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Grevenmacher is certainly longer, as only the direct route (as the crow flies) between Esch-sur-Alzette and Grevenmacher has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles