The calculated distance (air line) between Wiesbaden and Schwalbach am Taunus is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Schwalbach am Taunus is certainly longer, as only the direct route (as the crow flies) between Wiesbaden and Schwalbach am Taunus has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles