The calculated distance (air line) between Veľký Krtíš and Komárno is approximately 65 miles respectively 104 kilometers.
By car or train, the actual journey to Komárno is certainly longer, as only the direct route (as the crow flies) between Veľký Krtíš and Komárno has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles