The calculated distance (air line) between Frankfurt am Main and Villingen-Schwenningen is approximately 142 miles respectively 229 kilometers.
By car or train, the actual journey to Villingen-Schwenningen is certainly longer, as only the direct route (as the crow flies) between Frankfurt am Main and Villingen-Schwenningen has been calculated here.
Air line (approximately)
229 kilometers
123 nautical miles