The calculated distance (air line) between Szentgotthárd and Budapest XXI. kerület is approximately 135 miles respectively 218 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 Szentgotthárd and Budapest XXI. kerület has been calculated here.
Air line (approximately)
218 kilometers
118 nautical miles