The calculated distance (air line) between Tápiószecső and Budapest XXI. kerület is approximately 25 miles respectively 41 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 Tápiószecső and Budapest XXI. kerület has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles