The calculated distance (air line) between Balassagyarmat and Angyalföld is approximately 38 miles respectively 61 kilometers.
By car or train, the actual journey to Angyalföld is certainly longer, as only the direct route (as the crow flies) between Balassagyarmat and Angyalföld has been calculated here.
Air line (approximately)
61 kilometers
33 nautical miles