The calculated distance (air line) between Karlovo and Gorna Oryahovitsa is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Gorna Oryahovitsa is certainly longer, as only the direct route (as the crow flies) between Karlovo and Gorna Oryahovitsa has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles