The calculated distance (air line) between Balatonboglár and Angyalföld is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Angyalföld is certainly longer, as only the direct route (as the crow flies) between Balatonboglár and Angyalföld has been calculated here.
Air line (approximately)
138 kilometers
75 nautical miles