The calculated distance (air line) between Áyios Konstandínos and Khalándrion is approximately 137 miles respectively 220 kilometers.
By car or train, the actual journey to Khalándrion is certainly longer, as only the direct route (as the crow flies) between Áyios Konstandínos and Khalándrion has been calculated here.
Air line (approximately)
220 kilometers
119 nautical miles