The calculated distance (air line) between Wiesbaden and Königstein im Taunus is approximately 12 miles respectively 19 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 Wiesbaden and Königstein im Taunus has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles