The calculated distance (air line) between Wülflingen (Kreis 6) and Sankt Gallen is approximately 33 miles respectively 53 kilometers.
By car or train, the actual journey to Sankt Gallen is certainly longer, as only the direct route (as the crow flies) between Wülflingen (Kreis 6) and Sankt Gallen has been calculated here.
Air line (approximately)
53 kilometers
29 nautical miles