The calculated distance (air line) between Tápiószentmárton and Budapest IV. kerület is approximately 34 miles respectively 55 kilometers.
By car or train, the actual journey to Budapest IV. kerület is certainly longer, as only the direct route (as the crow flies) between Tápiószentmárton and Budapest IV. kerület has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles