The calculated distance (air line) between Tryavna and Gorna Oryahovitsa is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Gorna Oryahovitsa is certainly longer, as only the direct route (as the crow flies) between Tryavna and Gorna Oryahovitsa has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles