The calculated distance (air line) between Sandanski and Gorna Oryahovitsa is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to Gorna Oryahovitsa is certainly longer, as only the direct route (as the crow flies) between Sandanski and Gorna Oryahovitsa has been calculated here.
Air line (approximately)
264 kilometers
142 nautical miles