The calculated distance (air line) between Esch-sur-Alzette and Ettelbruck is approximately 25 miles respectively 40 kilometers.
By car or train, the actual journey to Ettelbruck is certainly longer, as only the direct route (as the crow flies) between Esch-sur-Alzette and Ettelbruck has been calculated here.
Air line (approximately)
40 kilometers
22 nautical miles