The calculated distance (air line) between Hatvan and Székesfehérvár is approximately 68 miles respectively 109 kilometers.
By car or train, the actual journey to Székesfehérvár is certainly longer, as only the direct route (as the crow flies) between Hatvan and Székesfehérvár has been calculated here.
Air line (approximately)
109 kilometers
59 nautical miles