The calculated distance (air line) between Haskovo and Veliko Tŭrnovo is approximately 79 miles respectively 128 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Haskovo and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
128 kilometers
69 nautical miles