The calculated distance (air line) between Veľký Krtíš and Petržalka is approximately 103 miles respectively 165 kilometers.
By car or train, the actual journey to Petržalka is certainly longer, as only the direct route (as the crow flies) between Veľký Krtíš and Petržalka has been calculated here.
Air line (approximately)
165 kilometers
89 nautical miles