The calculated distance (air line) between Tapolca and Székesfehérvár is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Székesfehérvár is certainly longer, as only the direct route (as the crow flies) between Tapolca and Székesfehérvár has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles