The calculated distance (air line) between Balatonboglár and Székesfehérvár is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Székesfehérvár is certainly longer, as only the direct route (as the crow flies) between Balatonboglár and Székesfehérvár has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles