The calculated distance (air line) between Sankt Georgen im Schwarzwald and Wiesbaden is approximately 135 miles respectively 218 kilometers.
By car or train, the actual journey to Wiesbaden is certainly longer, as only the direct route (as the crow flies) between Sankt Georgen im Schwarzwald and Wiesbaden has been calculated here.
Air line (approximately)
218 kilometers
117 nautical miles