The calculated distance (air line) between Balatonalmádi and Budapest XXI. kerület is approximately 56 miles respectively 91 kilometers.
By car or train, the actual journey to Budapest XXI. kerület is certainly longer, as only the direct route (as the crow flies) between Balatonalmádi and Budapest XXI. kerület has been calculated here.
Air line (approximately)
91 kilometers
49 nautical miles