The calculated distance (air line) between Omurtag and Gorna Oryahovitsa is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Gorna Oryahovitsa is certainly longer, as only the direct route (as the crow flies) between Omurtag and Gorna Oryahovitsa has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles