The calculated distance (air line) between Svilengrad and Veliko Tŭrnovo is approximately 95 miles respectively 154 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Svilengrad and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
154 kilometers
83 nautical miles