The calculated distance (air line) between Gorna Oryahovitsa and Kyustendil is approximately 164 miles respectively 263 kilometers.
By car or train, the actual journey to Kyustendil is certainly longer, as only the direct route (as the crow flies) between Gorna Oryahovitsa and Kyustendil has been calculated here.
Air line (approximately)
263 kilometers
142 nautical miles