The calculated distance (air line) between Silistra and Gorna Oryahovitsa is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Gorna Oryahovitsa is certainly longer, as only the direct route (as the crow flies) between Silistra and Gorna Oryahovitsa has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles