The calculated distance (air line) between Fonyód and Székesfehérvár is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Székesfehérvár is certainly longer, as only the direct route (as the crow flies) between Fonyód and Székesfehérvár has been calculated here.
Air line (approximately)
79 kilometers
43 nautical miles