The calculated distance (air line) between Kőszeg and Székesfehérvár is approximately 89 miles respectively 143 kilometers.
By car or train, the actual journey to Székesfehérvár is certainly longer, as only the direct route (as the crow flies) between Kőszeg and Székesfehérvár has been calculated here.
Air line (approximately)
143 kilometers
77 nautical miles