The calculated distance (air line) between Szentgotthárd and Kecskemét is approximately 161 miles respectively 260 kilometers.
By car or train, the actual journey to Kecskemét is certainly longer, as only the direct route (as the crow flies) between Szentgotthárd and Kecskemét has been calculated here.
Air line (approximately)
260 kilometers
140 nautical miles