The calculated distance (air line) between Eppstein and Königstein im Taunus is approximately 4 miles respectively 7 kilometers.
By car or train, the actual journey to Königstein im Taunus is certainly longer, as only the direct route (as the crow flies) between Eppstein and Königstein im Taunus has been calculated here.
Air line (approximately)
7 kilometers
4 nautical miles